Vacuum roller sealing strip limiting device in papermaking equipment

Abstract

The utility model relates to the technical field of papermaking equipment, in particular to a vacuum roller sealing strip limiting device in papermaking equipment, which comprises a vacuum box and two limiting blocks which are arranged in a vacuum roller drum, the two limiting blocks are respectively mounted on two sides of an output end of the vacuum box, and a groove is formed in one side, facing the inner wall of the vacuum roller drum, of each limiting block. A groove is formed in the inner wall of the vacuum roller cylinder, a supporting piece is arranged in the groove, a sealing strip is arranged at the top of the supporting piece, and a plurality of limiting long slotted holes with long circular sections are distributed in the sealing strip, the sealing strip making contact with the inner wall of the vacuum roller cylinder to achieve sealing is subjected to limiting treatment, and long bolts penetrate through the limiting long slotted holes and slide in the limiting long slotted holes in a limiting mode. The sealing strip moves up and down relative to the long bolt, the situation that the vacuum degree of the vacuum roller is too low due to excessive abrasion of the sealing strip is prevented, meanwhile, the service life of the sealing strip can be prolonged, the two limiting blocks are connected into a unified overall structure through the long bolt, and deformation of the limiting blocks and the sealing strip under the vacuum condition is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of papermaking equipment, and in particular to a vacuum roller sealing strip limiting device in papermaking equipment. Background Technology

[0002] In the papermaking process, vacuum rolls are widely used in the wire and press sections of paper machines. They are the core equipment of paper machines, and their main function is to use the negative pressure in the vacuum box to adsorb the paper sheet or dewater the wire.

[0003] Vacuum rolls in existing papermaking equipment are usually located in the paper web working section. A vacuum box is installed inside the roll shell, and a sealing structure is formed by the vacuum box and the sealing strip on the inner side of the roll wall. The sealing strip is supported by a support. The sealing strip is in constant contact with the rotating cylinder and wears excessively, requiring regular replacement. Once the sealing strip wears excessively, the vacuum of the vacuum roll will be too low, causing the paper machine to stop. Utility Model Content

[0004] In order to improve the problem of excessive wear of vacuum roll sealing strips in the above-mentioned background art, this utility model provides a vacuum roll sealing strip limiting device in papermaking equipment.

[0005] The present invention provides a vacuum roll sealing strip limiting device for papermaking equipment, which adopts the following technical solution:

[0006] A vacuum roll sealing strip limiting device for papermaking equipment includes a vacuum box and limiting blocks disposed inside the vacuum roll cylinder. Two limiting blocks are provided and respectively installed on both sides of the output end of the vacuum box. A groove is formed on the side of the limiting block facing the inner wall of the vacuum roll cylinder. A support member is disposed in the groove. A sealing strip is provided on the top of the support member. Multiple elongated limiting slots with an elongated cross-section are distributed on the sealing strip. Threaded holes are formed on the side walls of the two limiting blocks corresponding to the elongated limiting slots, and long bolts are provided. The long bolts pass through the elongated limiting slots of the two sealing strips and are tightened and fixed in the threaded holes.

[0007] Preferably, the support includes an air tube filled in the groove, and the air tube is externally connected to an inflation mechanism.

[0008] Preferably, a water film seal is provided between the sealing strip and the inner wall of the vacuum roller.

[0009] Preferably, a water groove is formed along the length of the sealing strip on the side facing the inner wall of the vacuum roller, and a nozzle is provided inside the water groove. The nozzle is connected to a water pipe and extends to the outside of the vacuum roller.

[0010] Preferably, the contact surface between the sealing strip and the inner wall of the vacuum roller is arc-shaped and corresponds to the shape of the inner wall of the vacuum roller.

[0011] Preferably, the width of the limiting slot corresponds to the diameter of the long bolt.

[0012] Preferably, the two limiting blocks, the vacuum box output end, and the inner wall of the vacuum roller form a sealed cavity. A pressure sensor is installed in the sealed cavity, and the pressure sensor is communicatively connected to a controller outside the vacuum roller.

[0013] In summary, this utility model has the following beneficial technical effects:

[0014] 1. This utility model provides a vacuum roller sealing strip limiting device, which limits the sealing strip that contacts the inner wall of the vacuum roller to achieve sealing. A long bolt is used to pass through the limiting long slot and slide within the limiting long slot, so that the sealing strip can move up and down relative to the long bolt. This prevents the vacuum of the vacuum roller from being too low due to excessive wear of the sealing strip, improves the vacuum holding capacity of the vacuum roller, and can extend the service life of the sealing strip, reduce the frequency and cost of replacing the sealing strip, thereby improving the working efficiency and quality of the entire system.

[0015] 2. Long bolts pass through the limiting slots of the two sealing strips to constrain the two sealing strips, and are connected and fixed to the side walls of the two limiting blocks to support the two limiting blocks, connecting the two limiting blocks into a unified whole structure, reducing the deformation of the limiting blocks and sealing strips under vacuum conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of a vacuum roll sealing strip limiting device in a papermaking equipment according to an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of the vacuum roller according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the sealing strip according to an embodiment of the present invention;

[0020] Figure 5 It is along Figure 4 A partial sectional view of the BB line.

[0021] Explanation of reference numerals in the attached drawings: 1. Vacuum roller; 2. Vacuum box; 3. Limiting block; 4. Groove; 5. Support; 6. Sealing strip; 7. Limiting long slot; 8. Threaded hole; 9. Long bolt; 10. Air tire; 11. Water tank; 12. Nozzle; 13. Water pipe; 14. Sealing cavity; 15. Air pressure sensor; 16. Controller. Detailed Implementation

[0022] The following combination Figures 1-5 The present invention will be described in further detail below.

[0023] This utility model discloses a vacuum roller sealing strip limiting device in a papermaking equipment.

[0024] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 A vacuum roll sealing strip limiting device for papermaking equipment includes a vacuum chamber 2 and limiting blocks 3 disposed inside the vacuum roll cylinder 1. Two limiting blocks 3 are provided and respectively installed on both sides of the output end of the vacuum chamber 2. A groove 4 is formed on the side of the limiting block 3 facing the inner wall of the vacuum roll cylinder 1. A support member 5 is disposed within the groove 4. A sealing strip 6 is provided on the top of the support member 5. Multiple elongated limiting slots 7 with oblong cross-sections are distributed on the sealing strip 6. Threaded holes 8 are formed on the sidewalls of the two limiting blocks 3 corresponding to the elongated limiting slots 7, and long bolts 9 are provided. The long bolts 9 are made of stainless steel. While maintaining high strength, it also has corrosion resistance. The long bolt 9 passes through the limiting long slot 7 of the two sealing strips 6 and is tightened and fixed in the threaded hole 8. The long bolt 9 slides relative to the limiting long slot 7 and is relatively fixed. Therefore, the sealing strip 5 with the limiting long slot 7 can move up and down a certain distance relative to the long bolt 9. The movement distance is limited by the structural boundary of the limiting long slot 7. The long bolt 9 is connected and fixed to the side wall of the two limiting blocks 3 to support the two limiting blocks 3, connecting the two limiting blocks 3 into a unified whole structure, so that the two limiting blocks 3 are firmly installed.

[0025] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 The limiting long slot 7 is an elongated oval hole with a cross-section of semicircles at both ends and a rectangle in the middle. In this embodiment, the length direction of the limiting long slot 7 allows bolts, screws and other connecting parts to move freely vertically within the limiting long slot 7, thereby realizing the adjustment of the installation position or compensating for the relative displacement between the parts.

[0026] Reference Figure 1 , Figure 2 The support member 5 includes an air tire 10 filled in the groove 4, and the air tire 10 is externally connected to an inflation mechanism.

[0027] Reference Figure 1 , Figure 2 , Figure 4 A water film seal is provided between the sealing strip 6 and the inner wall of the vacuum roller 1. A water groove 11 is provided along the length of the sealing strip 6 facing the inner wall of the vacuum roller 1. A nozzle 12 is provided inside the water groove 11. The nozzle 12 is connected to a water pipe 13 and extends to the outside of the vacuum roller 1, forming a water film between the sealing strip 6 and the inner wall of the vacuum roller 1.

[0028] Reference Figure 1 , Figure 2 , Figure 4 The contact surface between the sealing strip 6 and the inner wall of the vacuum roller 1 is arc-shaped and corresponds to the shape of the inner wall of the vacuum roller 1. The sealing strip 6 is made of high molecular weight polyethylene.

[0029] Reference Figure 1 , Figure 2 , Figure 5 The width of the limiting slot 7 corresponds to the diameter of the long bolt 9.

[0030] Reference Figure 1 , Figure 2 Two limit blocks 3, together with the output end of vacuum box 2 and the inner wall of vacuum roller 1, form a sealed cavity 14. A pressure sensor 15 is installed in the sealed cavity 14, and the pressure sensor 15 is communicatively connected to the controller 16 outside the vacuum roller 1.

[0031] The implementation principle of the vacuum roller sealing strip limiting device in a papermaking equipment according to this utility model embodiment is as follows: two limiting blocks 3 are respectively installed on both sides of the output end of the vacuum box 2, and the air tube 10 set in the groove 4 is inflated. After the air tube 10 is inflated, it generates an expansion force, which pushes up the sealing strip 6 installed on the air tube 10. The sealing strip 6 is tightly attached to one side of the inner wall of the vacuum roller 1, thereby forming a seal and preventing vacuum leakage inside the vacuum roller 1.

[0032] The sealing strip 6 has multiple elongated slots 7 with oblong cross-sections. The long bolt 9 is inserted into the threaded hole 8 on one side of the limiting block 3, and passes through the elongated slot 7, the threaded hole 8, the sealing cavity 14, the threaded hole 8, and the elongated slot 7 in sequence, and is fastened in the threaded hole 8 on the other side of the limiting block 3, connecting the two limiting blocks 3 into a unified whole structure, so that the two limiting blocks 3 are firmly installed. The sealing strip 5 can move up and down a certain distance through the elongated slot 7. At the same time, when the sealing strip 5 moves upward under the expansion force, the movement distance is limited by the structural boundary of the elongated slot 7. When it moves to the maximum position, due to the water film seal between the sealing strip 6 and the inner wall of the vacuum roller 1, the sealing strip 5 contacts the inner wall of the vacuum roller 1 but does not rub, which greatly extends the service life of the sealing strip 5.

[0033] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A vacuum roll sealing strip limiting device in papermaking equipment, characterized in that: The device includes a vacuum box (2) and a limiting block (3) inside the vacuum roller (1). There are two limiting blocks (3) installed on both sides of the output end of the vacuum box (2). The limiting block (3) has a groove (4) on the side facing the inner wall of the vacuum roller (1). A support member (5) is provided in the groove (4). A sealing strip (6) is provided on the top of the support member (5). Multiple long slot holes (7) with an elongated cross section are distributed on the sealing strip (6). Threaded holes (8) are provided on the side walls of the two limiting blocks (3) corresponding to the long slot holes (7), and long bolts (9) are provided. The long bolts (9) pass through the long slot holes (7) of the two sealing strips (6) and are tightened and fixed in the threaded holes (8).

2. The vacuum roll sealing strip limiting device in a papermaking equipment according to claim 1, characterized in that: The support member (5) includes an air tube (10) filled in a groove (4), and the air tube (10) is externally connected to an inflation mechanism.

3. The vacuum roll sealing strip limiting device in a papermaking equipment according to claim 1, characterized in that: A water film seal is provided between the sealing strip (6) and the inner wall of the vacuum roller (1).

4. A vacuum roll sealing strip limiting device in a papermaking equipment according to claim 3, characterized in that: The sealing strip (6) has a water groove (11) along its length on the side facing the inner wall of the vacuum roller (1). A nozzle (12) is provided inside the water groove (11). The nozzle (12) is connected to a water pipe (13) and extends to the outside of the vacuum roller (1).

5. A vacuum roll sealing strip limiting device in a papermaking equipment according to claim 1, characterized in that: The contact surface between the sealing strip (6) and the inner wall of the vacuum roller (1) is arc-shaped and corresponds to the shape of the inner wall of the vacuum roller (1).

6. A vacuum roll sealing strip limiting device in a papermaking equipment according to claim 1, characterized in that: The width of the limiting long slot (7) corresponds to the diameter of the long bolt (9).

7. A vacuum roll sealing strip limiting device in a papermaking equipment according to claim 1, characterized in that: The two limiting blocks (3) together with the output end of the vacuum box (2) and the inner wall of the vacuum roller (1) form a sealed cavity (14). A pressure sensor (15) is installed in the sealed cavity (14). The pressure sensor (15) is connected to the controller (16) outside the vacuum roller (1).

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