Vacuum couch vacuum box

Abstract

This utility model relates to the field of papermaking equipment technology and discloses a vacuum box for a vacuum roll, including an outer roll. Fixed rings are fixedly connected to both sides of the outer roll, and a vacuum box is fixedly connected inside the outer roll. Multiple partition plates are fixedly connected to the outside of the vacuum box, and a flow-blocking plate is fixedly connected to one side of each partition plate. A sealing end block is fixedly connected inside one of the fixed rings, and a conducting end block is fixedly connected inside the other fixed ring. A central shaft is rotatably connected between the sealing end block and the conducting end block, and the central shaft also passes through the outer roll. Multiple mounting grooves are opened on the inner side of the outer roll, and multiple through holes are also opened between two mounting grooves. By optimizing the structure of components such as the vacuum chamber and the suction hole, the vacuum box divides the outer roll and the vacuum box into multiple chambers, resulting in a more uniform negative pressure distribution. Combined with the efficient water guiding through the suction hole, this reduces paper web wrinkles or damage caused by local pressure imbalance, improves forming quality, and simplifies the overall structure, thus improving subsequent maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, and in particular to a vacuum roll vacuum box. Background Technology

[0002] The vacuum coil roll is installed at the end of the wire section and consists of a hollow roll body, roll shell and internal vacuum chamber or vacuum box. During operation, the vacuum system generates negative pressure to adsorb the wet paper web on the forming wire onto the roll surface, realizing the smooth transfer of the paper web from the wire section to the press section. At the same time, the vacuum suction can further remove moisture from the wet paper, improve the dryness and strength of the paper web, and reduce the risk of breakage during transfer.

[0003] Existing single-chamber vacuum rolls include a Chinese utility model patent disclosed in announcement number CN209411447U: A Vacuum Roller. This application includes a coaxial outer roller and an inner roller. Its features include: air holes on the outer roller; two partitions between the inner wall of the outer roller and the outer wall of the inner roller; one end of each partition is connected to the outer wall of the inner roller at intervals along the axial direction of the inner roller; the other end of each partition is connected to the inner wall of the outer roller; and the two partitions and the side wall of the inner roller form a V-shaped area. Vacuum adjustment is singular, making it impossible to precisely control suction for different areas of the wet paper web. This easily leads to excessively dry edges or insufficient dehydration in the middle of the paper web, affecting paper uniformity. Furthermore, the single-chamber design concentrates the load on the vacuum system; when there is local blockage or leakage, the overall vacuum effect drops sharply, resulting in unstable paper web transfer, increased breakage rate, and poor adaptability. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum box for vacuum rolls, which optimizes components such as the chamber and liquid suction hole to achieve uniform negative pressure and reduce paper web damage, thereby effectively solving the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A vacuum box for a vacuum roll includes an outer roll, with fixed rings fixedly connected to both sides of the outer roll. A vacuum box is fixedly connected inside the outer roll, and multiple partition plates are fixedly connected to the outside of the vacuum box. A flow-blocking plate is fixedly connected to one side of each partition plate. A sealing end block is fixedly connected inside one of the fixed rings, and a conducting end block is fixedly connected inside the other fixed ring. A central shaft is rotatably connected between the sealing end block and the conducting end block, and the central shaft also passes through the outer roll.

[0007] As a further preferred embodiment of this utility model, the outer roller has multiple mounting grooves on its inner side, and the outer roller located between two mounting grooves also has multiple through holes. The multiple mounting grooves on the inner side of the outer roller provide conditions for the assembly and disassembly of the vacuum box.

[0008] As a further preferred embodiment of this utility model, the vacuum box is inserted into the outer roller, and one side of the partition plate is inserted into the corresponding mounting groove. A guide groove is provided between two adjacent partition plates. The guide groove can guide water droplets that are vacuum-adsorbed onto the outer surface of the vacuum box to the flow-blocking plate by the centrifugal force of the vacuum box rotation.

[0009] As a further preferred embodiment of this utility model, the longitudinal section of the flow-blocking plate is arc-shaped, and multiple liquid-binding grooves are provided on one side of the flow-blocking plate relative to the vacuum box. When the rotating vacuum box throws the adsorbed water droplets onto the flow-blocking plate through the vacuum negative pressure, the water droplets are quickly sucked away by the multiple liquid-binding grooves due to the directional suction force formed in the liquid-binding grooves by the vacuum negative pressure.

[0010] As a further preferred embodiment of this utility model, a positioning block is fixedly connected to one side of the conductive end block, and multiple air inlets are opened on one side of the conductive end block near the positioning block. An air guiding cavity is opened inside the positioning block and the conductive end block, and one side of the air guiding cavity communicates with the multiple air inlets. A sealing ring is fixedly connected to the outside of the conductive end block, and the conductive end block is fixedly connected in the corresponding fixing ring. The positioning block is inserted into the vacuum chamber.

[0011] As a further preferred embodiment of this utility model, the central shaft has a hollow structure. The central shaft located in the positioning block is also provided with multiple air guide holes. The inner cavity of the central shaft is connected to the inner cavity of the air guide chamber through the air guide holes. One end of the central shaft is also connected to an external vacuum negative pressure device through an air pipe. After the conducting end block is rotated by an external power device, the conducting end block and the sealing end block can drive the outer roller to rotate, while the central shaft does not rotate. This allows the moisture in the paper to be sucked into the vacuum box, the partition plate, and the flow barrier plate through multiple through holes on the inner side of the outer roller, and then sucked out through the air inlet, the air guide chamber, the air guide holes, and the central shaft by the vacuum negative pressure.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, the vacuum box optimizes the structure of components such as the vacuum chamber and the liquid suction hole, dividing the outer roller and the vacuum box into multiple chambers. This allows for a more uniform distribution of negative pressure, and the liquid suction hole efficiently guides water, reducing paper web wrinkles or damage caused by local pressure imbalance, thus improving forming quality. The overall structure is also more streamlined, improving the efficiency of later maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the central axis and the conductive end block of this utility model;

[0016] Figure 3 This is a schematic diagram of the outer roller structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the vacuum chamber structure of this utility model.

[0018] In the diagram: 1. Outer roller; 2. Central shaft; 3. Sealing end block; 4. Conducting end block; 5. Fixing ring; 6. Vacuum box; 7. Partition plate; 8. Baffle plate; 9. Mounting groove; 10. Air guide hole; 11. Air inlet hole; 12. Positioning block; 13. Air guide cavity; 14. Sealing ring; 15. Liquid jet groove; 16. Flow guide groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-4 As shown, the present invention provides a vacuum vaulting vacuum box, including an outer roller 1, with fixed rings 5 ​​fixedly connected to both sides of the outer roller 1, a vacuum box 6 fixedly connected inside the outer roller 1, and multiple partition plates 7 fixedly connected to the outside of the vacuum box 6. A flow-blocking plate 8 is fixedly connected to one side of the partition plate 7. A sealing end block 3 is fixedly connected inside one of the fixed rings 5, and a conducting end block 4 is fixedly connected inside the other fixed ring 5. A central shaft 2 is rotatably connected between the sealing end block 3 and the conducting end block 4, and the central shaft 2 also passes through the outer roller 1.

[0021] like Figure 1 , Figure 3 As shown, the outer roller 1 has multiple mounting grooves 9 on its inner side, and the outer roller 1 located between two mounting grooves 9 also has multiple through holes. The multiple mounting grooves 9 on the inner side of the outer roller 1 provide conditions for the disassembly and assembly of the vacuum box 6.

[0022] like Figures 1-4As shown, the vacuum box 6 is inserted into the outer roller 1, and one side of the partition plate 7 is inserted into the corresponding mounting groove 9. A guide groove 16 is provided between two adjacent partition plates 7. The guide groove 16 can guide water droplets adsorbed by vacuum onto the outer surface of the vacuum box 6 to the baffle plate 8 by the centrifugal force of the rotating vacuum box 6. The baffle plate 8 has an arc-shaped longitudinal section. Multiple liquid-binding grooves 15 are provided on one side of the baffle plate 8 opposite to the vacuum box 6. When the rotating vacuum box 6 throws the adsorbed water droplets onto the baffle plate 8 through the vacuum negative pressure, the water droplets are quickly sucked away by the multiple liquid-binding grooves 15. The liquid-binding grooves 15 form a directional suction force due to the vacuum negative pressure. A positioning block 12 is fixedly connected to one side of the connecting end block 4. Multiple air inlets 11 are provided on one side of the connecting end block 4 near the positioning block 12. Air guiding chambers 13 are provided in the positioning block 12 and the connecting end block 4. One side of the 13 is connected to multiple air inlets 11. A sealing ring 14 is fixedly connected to the outside of the guide end block 4. The guide end block 4 is fixedly connected to the corresponding fixing ring 5. The positioning block 12 is inserted into the vacuum box 6. The central shaft 2 has a hollow structure. The central shaft 2 located in the positioning block 12 also has multiple air guide holes 10. The inner cavity of the central shaft 2 is connected to the inner cavity of the air guide cavity 13 through the air guide holes 10. One end of the central shaft 2 is also connected to the external vacuum negative pressure equipment through the air pipe. After the guide end block 4 is rotated by the external power equipment, the guide end block 4 and the sealing end block 3 can drive the outer roller 1 to rotate, while the central shaft 2 does not rotate. This allows the moisture of the paper to be sucked into the vacuum box 6, the partition plate 7, and the baffle plate 8 through multiple through holes on the inner side of the outer roller 1, and then sucked out through the air inlet 11, the air guide cavity 13, the air guide holes 10, and the central shaft 2 through the vacuum negative pressure.

[0023] It should be noted that this utility model is a vacuum box for a vacuum roll. During operation, an external power device drives the conductive end block 4 to rotate, which in turn causes the fixed ring 5 and the outer roll 1 to rotate. The two ends of the central shaft 2 are kept stationary by fixing parts. The wet paper web contacts the surface of the outer roll 1, and the through holes on the outer roll 1, in conjunction with the vacuum negative pressure, draw the moisture on the paper web into the interior. The partition plate 7 on the outside of the vacuum box 6 divides the space into multiple areas, which, together with the mounting groove 9 on the inner side of the outer roll 1, allow each area to form an independent negative pressure space. In this way, the centrifugal force generated by the rotation of the vacuum box 6 and the vacuum negative pressure... Under the action of the liquid, the water will be thrown into the guide channel 16. The guide channel 16 guides the water flow to the baffle plate 8. The baffle plate 8 is arc-shaped, and the liquid-binding groove 15 on its surface can use centrifugal force to restrict the water droplets in the groove, preventing the water droplets from splashing randomly. Then, the central shaft 2 is connected to the external vacuum negative pressure equipment through the air pipe. The air guide hole 10 in the central shaft 2 is connected to the air guide cavity 13 in the guide end block 4. The air guide cavity 13 is connected to the air inlet hole 11. Under the action of vacuum negative pressure, the water droplets in the liquid-binding groove 15 enter the central shaft 2 in sequence through the air inlet hole 11, the air guide cavity 13, and the air guide hole 10, and are finally discharged from the equipment.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum vaulting box, characterized in that: The device includes an outer roller (1), with fixed rings (5) fixedly connected to both sides of the outer roller (1), a vacuum box (6) fixedly connected inside the outer roller (1), and multiple partition plates (7) fixedly connected to the outside of the vacuum box (6). A flow-blocking plate (8) is fixedly connected to one side of the partition plate (7). A sealing end block (3) is fixedly connected inside one of the fixed rings (5), and a conducting end block (4) is fixedly connected inside the other fixed ring (5). A central shaft (2) is rotatably connected between the sealing end block (3) and the conducting end block (4), and the central shaft (2) also passes through the outer roller (1).

2. The vacuum vaulting vacuum box according to claim 1, characterized in that: The outer roller (1) has multiple mounting grooves (9) on its inner side, and the outer roller (1) located between two mounting grooves (9) also has multiple through holes.

3. A vacuum vaulting box according to claim 2, characterized in that: The vacuum box (6) is inserted into the outer roller (1), and one side of the partition plate (7) is inserted into the corresponding mounting groove (9). A guide groove (16) is provided between two adjacent partition plates (7).

4. A vacuum vaulting box according to claim 3, characterized in that: The flow baffle (8) has an arc-shaped longitudinal section, and multiple liquid streams (15) are provided on one side of the flow baffle (8) relative to the vacuum box (6).

5. A vacuum vaulting box according to claim 1, characterized in that: One side of the conductive end block (4) is fixedly connected to a positioning block (12). Multiple air inlets (11) are opened on one side of the conductive end block (4) near the positioning block (12). An air guiding cavity (13) is opened in the positioning block (12) and the conductive end block (4). One side of the air guiding cavity (13) is connected to multiple air inlets (11). A sealing ring (14) is fixedly connected to the outside of the conductive end block (4). The conductive end block (4) is fixedly connected in the corresponding fixing ring (5). The positioning block (12) is inserted into the vacuum box (6).

6. A vacuum vaulting vacuum box according to claim 5, characterized in that: The central shaft (2) has a hollow structure. The central shaft (2) located in the positioning block (12) is also provided with multiple air guide holes (10). The inner cavity of the central shaft (2) is connected to the inner cavity of the air guide cavity (13) through the air guide holes (10). One end of the central shaft (2) is also connected to an external vacuum negative pressure device through an air pipe.

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