Steam-saving paper machine drying cylinder

Abstract

The utility model discloses a steam-saving type paper machine drying cylinder, which relates to the technical field of paper making equipment, and comprises a rack, a drying cylinder is arranged on the inner side of the rack, and end covers are detachably arranged at the two ends of the drying cylinder. The drying cylinder can be heated, the steam condensation process is located in the heating box, the drying cylinder is kept at the high temperature all the time, and therefore paper can be better dried, steam flowing through the drying cylinder can be condensed in the heating box, waste heat is transmitted to heat air above the heat conduction plate and then discharged through the air blowing pipe, and therefore the lower surface of the paper is dried. The two faces of paper are dried at the same time, the drying effect is improved, heat loss is reduced, steam consumption is reduced, and practicability is higher; through the adjusting assembly, the height position of the pressing roller can be adjusted so that the pressing roller can extrude paper to be tightly attached to the outer wall face of the drying cylinder, and therefore the paper can be better dried.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically a steam-saving papermaking machine drying cylinder. Background Technology

[0002] Papermaking machinery encompasses raw material preparation, pulping, papermaking, and the production of finished rolls or sheets, as well as the processing of paper and paperboard. Drying cylinders are common equipment in the papermaking process, used for example in pressing kraft paper (also known as high-temperature hot-pressed kraft paper, a special industrial technical paper mainly used to ensure quality during PCB circuit board production) and fire-resistant paperboard. A drying cylinder is a hollow cylinder made of cast iron with lids at both ends, consisting of a cylinder body and lids at both ends. Its outer diameter is typically 1000-3000 mm. During operation, steam is circulated inside to dry and calender the conveyed paper. Saturated steam is introduced into the drying cylinder; as the steam condenses inside, it releases heat, raising the cylinder temperature and thus heating the paper sheet traveling on the roller surface. Heat is transferred to the paper through contact with the drying cylinder surface, causing the moisture in the paper to evaporate.

[0003] Currently, most drying cylinders used in papermaking processes typically involve continuously pressurizing and supplying high-temperature steam into the cylinder's interior to heat the cylinder surface, which then condenses into water. Most drying cylinders use siphons to drain this condensate. However, in actual production, siphon component malfunctions, cylinder rotation speed variations, and other factors can cause condensate residue inside the cylinder. As the cylinder rotates, this condensate cools the cylinder surface, leading to wasted heat energy, increased steam consumption, and inconvenience. Furthermore, traditional equipment often only dries one side, resulting in relatively low drying efficiency and poor practicality. Utility Model Content

[0004] The purpose of this invention is to provide a steam-saving paper machine drying cylinder to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steam-saving paper machine drying cylinder, including a frame, with a drying cylinder located inside the frame. Both ends of the drying cylinder are detachably fitted with end caps. A hollow shaft passing through the end cap is connected to one side of each end cap. The hollow shaft is rotatably connected to the frame via a bearing seat. A drying mechanism is connected to one side of the frame and is connected to one end of the left hollow shaft. A pressure roller is located below the drying cylinder and is connected to the frame via an adjusting assembly. The drying mechanism includes a heating box, which is fixedly installed on one side of the frame. A heat-conducting plate is located inside the heating box. A blower pipe connected to the heating box is located between the frames and between the drying cylinder and the heat-conducting plate. Several blower heads are located at the top of the blower pipe.

[0006] Furthermore, the drying mechanism also includes several partitions, which are equidistantly arranged on the top of the heat-conducting plate. Each partition has a through groove on one side. Several partitions are equidistantly installed on the bottom of the heat-conducting plate, and these partitions are staggered in front of and behind. A discharge pipe communicating with the heating chamber is located on one side of the lower part of each partition. The heating chamber is rotatably connected to one end of a hollow shaft located on the left side via a conduit, with the lower end of the conduit located below the heat-conducting plate. This arrangement of the drying mechanism allows the steam passing through the drying cylinder to quickly reach the heating chamber. After the drying cylinder transfers heat, the steam carrying some heat is transferred to the heating chamber and then flows through the channel formed between the heat-conducting plate and the second partition, extending its residence time in the heating chamber. This allows for better heat transfer through the heat-conducting plate to the space above, heating the air in the space above and blowing it out through the blower pipe. This, in conjunction with the drying cylinder, allows for simultaneous drying of both sides of the paper, improving the drying effect. Meanwhile, the water generated by the condensation of steam in the heating chamber is discharged through the drain pipe for collection, so that the water can be reused, saving resources.

[0007] Furthermore, the adjusting component includes a stud, and the inner wall of the frame is symmetrically provided with a sliding groove and a receiving groove, with the receiving groove located below the sliding groove. The stud is rotatably installed at the bottom of the sliding groove, and the lower end of the stud is connected to a drive handle in the receiving groove. A threaded cylinder with a threaded connection is fitted on the outer side of the stud, and a top block is connected to the top of the threaded cylinder. The top of the top block is connected to a slider through a spring. The inner wall of the frame is symmetrically provided with rail grooves communicating with the sliding groove. The two ends of the pressure roller are rotatably connected to the sliders on both sides. The setting of the adjusting component can easily adjust the position of the pressure roller so that the pressure roller squeezes the paper and makes it fit tightly against the outer wall of the drying cylinder, thereby better drying it.

[0008] Furthermore, a number of ventilation holes are provided on one side wall of the upper part of the heating box. A fan cover is fixedly installed on the inner wall of the heating box near the frame. A fan is fixedly installed inside the fan cover. A filter screen is provided at the opening of the fan cover. One end of the air blowing pipe is fixedly connected to the fan cover so that the heated air can be drawn to the air blowing pipe by the fan.

[0009] Furthermore, the through slots opened on the partition plate one are arranged in a staggered manner from bottom to top, and the partition plate one is fixedly connected to the heat-conducting plate and the inner wall of the heating box, and the partition plate two is fixedly connected to the inner wall of the heating box and the heat-conducting plate, so as to form a meandering channel, thereby prolonging the air residence time, and thus heating it and increasing its temperature.

[0010] Furthermore, the stud is rotatably connected to the frame via a bearing, the structure of the slider is adapted to the combined structure of the slide groove and the rail groove, and the slider is slidably connected to the inner wall of the slide groove and the rail groove respectively. The two ends of the spring are fixedly connected to the top block and the slider respectively, so as to limit and guide the slider.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, through the cooperation of the drying cylinder and the drying mechanism, allows steam to flow rapidly through the drying cylinder under high pressure and enter the heating box, which heats the drying cylinder. The steam condensation process takes place inside the heating box, keeping the drying cylinder at a high temperature for better paper drying. The steam flowing through the drying cylinder will condense in the heating box and transfer its residual heat. It will also heat the air above the heat-conducting plate and be discharged through the blower pipe, thus drying the lower surface of the paper. This achieves simultaneous drying of both sides of the paper, improving the drying effect, reducing heat loss, reducing steam consumption, and making it convenient and practical.

[0013] 2. This utility model allows for adjustment of the height and position of the pressure roller via an adjustment component, so that the pressure roller can squeeze the paper into close contact with the outer wall of the drying cylinder, thereby improving the drying process. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram of the structure between the heat-conducting plate, partition one, and partition two of this utility model;

[0016] Figure 3 This is a partial structural diagram of the frame, pressure roller, and slider of this utility model;

[0017] Figure 4 This utility model Figure 3 A schematic diagram of the side section structure.

[0018] The following are the labels in the diagram: 1. Frame; 2. Hollow shaft; 3. End cover; 4. Drying cylinder; 5. Pressure roller; 6. Air blower; 7. Heating box; 8. Heat-conducting plate; 9. Partition 1; 10. Partition 2; 11. Fan cover; 12. Fan; 13. Stud; 14. Drive handle; 15. Threaded cylinder; 16. Top block; 17. Spring; 18. Slider; 19. Slide groove; 20. Receiving groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Figure 1 - Figure 4As shown, this utility model provides a technical solution: a steam-saving paper machine drying cylinder, including a frame 1, a drying cylinder 4 disposed inside the frame 1, end caps 3 detachably mounted on both ends of the drying cylinder 4, a hollow shaft 2 penetrating the end cap 3 connected to one side of the end cap 3, the hollow shaft 2 being rotatably connected to the frame 1 via a bearing seat, a drying mechanism connected to one side of the frame 1, and the drying mechanism being connected to one end of the left hollow shaft 2, a pressure roller 5 disposed below the drying cylinder 4. In this example, the hollow shaft 2 located on the right side of the drying cylinder 4 is connected to an external driving device, which can be a synchronous pulley driven by a motor, a synchronous belt drive, or a sprocket driven by a motor. The chain drive is not an existing technology, so it will not be described in detail. In addition, one end of the hollow shaft 2 located on the right side of the drying cylinder 4 is connected to the external steam conveying equipment pipeline. The pressure roller 5 is connected to the frame 1 through the adjustment component. The drying mechanism includes a heating box 7, which is fixedly installed on one side of the frame 1. The heating box 7 is provided with a heat-conducting plate 8. There is a blower pipe 6 connected to the heating box 7 between the frames 1. The blower pipe 6 is located between the drying cylinder 4 and the heat-conducting plate 8. In this example, the bottom surface of the heating box 7 is a slope with the left side higher than the right side. The heat-conducting plate 8 is set parallel to the bottom surface of the heating box 7. The top of the blower pipe 6 is provided with several blower heads. In this example, the drying mechanism also includes partition 9, and several partitions 9 are provided. These partitions 9 are equidistantly arranged on the top of the heat-conducting plate 8, and each partition 9 has a through groove on one side. Several partitions 10 are equidistantly installed at the bottom of the heat-conducting plate 8, and these partitions 10 are arranged in a staggered manner. A discharge pipe communicating with the heating box 7 is provided on one side of the lower part of each partition 10. The heating box 7 is rotatably connected to one end of the hollow shaft 2 located on the left side via a conduit, and the lower end of the conduit is located below the heat-conducting plate 8. This arrangement of the drying mechanism allows the steam passing through the drying cylinder 4 to quickly reach the drying cylinder. 4. After heating, the steam carrying some heat is transferred to the heating chamber 7, and then flows through the channel formed between the heat-conducting plate 8 and the partition 10, prolonging its residence time in the heating chamber 7. This allows the heat to be better transferred to the space above through the heat-conducting plate 8, thereby heating the air in the space above and blowing it out through the blower pipe 6. This works in conjunction with the drying cylinder 4 to simultaneously dry both sides of the paper, improving the drying effect. At the same time, the water generated by the condensation of steam in the heating chamber 7 is discharged through the discharge pipe for collection, so as to reuse the water and save resources.In this example, the adjustment component includes a stud 13. The inner wall of the frame 1 is symmetrically provided with a slide groove 19 and a receiving groove 20, with the receiving groove 20 located below the slide groove 19. The stud 13 is rotatably installed at the bottom of the slide groove 19. The lower end of the stud 13 is connected to a drive handle 14 in the receiving groove 20. A threaded sleeve 15 is fitted on the outside of the stud 13. A top block 16 is connected to the top of the threaded sleeve 15. The top of the top block 16 is connected to a slider 18 via a spring 17. The inner wall of the frame 1 is symmetrically provided with rail grooves communicating with the slide groove 19. The two ends of the pressure roller 5 are rotatably connected to the sliders 18 on both sides. The setting of the adjustment component can easily adjust the position of the pressure roller 5 so that the pressure roller 5 can squeeze the paper and make it fit tightly against the outer wall of the drying cylinder 4, thereby better drying it. In this example, several ventilation holes are provided on one side wall of the upper part of the heating box 7. A fan cover 11 is fixedly installed on the inner wall of the heating box 7 near the frame 1. A fan 12 is fixedly installed inside the fan cover 11. A filter screen is provided at the opening of the fan cover 11. One end of the air blowing pipe 6 is fixedly connected to the fan cover 11 so that the heated air can be drawn to the air blowing pipe 6 by the fan.

[0021] In this example, the slots on several partition plates 9 are arranged in a staggered manner, and partition plates 9 are fixedly connected to the heat-conducting plate 8 and the inner wall of the heating box 7. Partition plates 10 are also fixedly connected to the inner wall of the heating box 7 and the heat-conducting plate 8 to form a meandering channel, thereby extending the air residence time and heating it to increase its temperature. In this example, the stud 13 is rotatably connected to the frame 1 via bearings. The structure of the slider 18 is adapted to the combined structure of the slide groove 19 and the rail groove, and the slider 18 is slidably connected to the inner wall of the slide groove 19 and the rail groove respectively. The two ends of the spring 17 are fixedly connected to the top block 16 and the slider 18 respectively to limit and guide the slider 18.

[0022] The working principle of this utility model is as follows: During use, steam is delivered to the connected hollow shaft 2 via an external steam supply device, and then guided into the drying cylinder 4. This heats the drying cylinder 4, which in turn dries the paper passing below. Under high pressure, the steam flows rapidly through the drying cylinder 4, and then through a conduit to the space below the heat-conducting plate 8 inside the heating chamber 7. It then flows through a meandering curved channel formed by several partitions 10, the heating chamber 7, and the heat-conducting plate 8, thus extending the residence time of the steam in the heating chamber 7. This allows the steam to contact the heat-conducting plate 8, transferring its heat to the space above it, thereby heating the air above. Simultaneously, the fan 12 draws in surrounding air, causing it to flow between multiple partitions 9, further extending the air residence time and resulting in a longer heating time. The heated air is then drawn into the blower pipe 6 and blown out through the blower head, drying the paper passing through. This process, combined with the drying cylinder 4, allows for simultaneous drying of both sides of the paper. This design improves drying efficiency and effect while reducing heat utilization, heat loss, and steam consumption. Steam flowing below the heat-conducting plate 8 condenses into water after transferring heat, and the water converges to one side and is discharged through the discharge pipe for collection and reuse. When adjusting the height of the pressure roller 5, the drive handle 14 rotates to drive the connected stud 13 to rotate synchronously. The stud 13 drives the threaded cylinder 15 to move the top block 16 up or down, which in turn drives the spring 17 to move the slider 18 synchronously. This causes the slider 18 to move the connected pressure roller 5 synchronously, thus changing the height of the pressure roller 5. When the pressure roller 5 is adjusted upwards, the spring 17 causes the slider 18 to squeeze the spring 17 when the pressure roller 5 receives downward pressure, thus buffering the force. The spring force of the spring 17 also indirectly acts on the pressure roller 5, ensuring a tight fit between the paper and the outer wall of the drying cylinder 4 for better paper drying. This design is convenient and highly practical.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A steam-saving paper machine drying cylinder, comprising a frame (1), characterized in that: The frame (1) is provided with a drying cylinder (4) inside. Both ends of the drying cylinder (4) are detachably installed with end caps (3). A hollow shaft (2) is connected to one side of the end cap (3) and passes through the end cap (3). The hollow shaft (2) is rotatably connected to the frame (1) through a bearing seat. A drying mechanism is connected to one side of the frame (1) and is connected to one end of the hollow shaft (2) on the left side. A pressure roller (5) is provided below the drying cylinder (4). The pressure roller (5) is connected to the frame (1) through an adjustment component. The drying mechanism includes a heating box (7) and is fixedly installed on one side of the frame (1). A heat-conducting plate (8) is provided inside the heating box (7). A blower pipe (6) connected to the heating box (7) is provided between the frames (1). The blower pipe (6) is located between the drying cylinder (4) and the heat-conducting plate (8). Several blower heads are provided on the top of the blower pipe (6).

2. The steam-saving paper machine drying cylinder according to claim 1, characterized in that: The drying mechanism also includes partition 1 (9), and there are several partition 1 (9). Several partition 1 (9) are equidistantly arranged on the top of the heat-conducting plate (8), and a through groove is opened on one side of each partition 1 (9). Several partition 2 (10) are equidistantly installed at the bottom of the heat-conducting plate (8), and the several partition 2 (10) are arranged in a staggered manner. A discharge pipe communicating with the heating box (7) is provided on the lower side of the partition 2 (10). The heating box (7) is rotatably connected to one end of the hollow shaft (2) located on the left side through a conduit, and the lower end of the conduit is located below the heat-conducting plate (8).

3. The steam-saving paper machine drying cylinder according to claim 1, characterized in that: The adjustment assembly includes a stud (13). The inner wall of the frame (1) is symmetrically provided with a sliding groove (19) and a receiving groove (20), and the receiving groove (20) is located below the sliding groove (19). The stud (13) is rotatably installed at the bottom of the sliding groove (19). The lower end of the stud (13) is connected to a drive handle (14) in the receiving groove (20). The outer side of the stud (13) is fitted with a threaded sleeve (15) with a threaded connection. The top of the threaded sleeve (15) is connected to a top block (16). The top of the top block (16) is connected to a slider (18) through a spring (17). The inner wall of the frame (1) is symmetrically provided with a rail groove communicating with the sliding groove (19). The two ends of the pressure roller (5) are rotatably connected to the sliders (18) on both sides respectively.

4. A steam-saving paper machine drying cylinder according to claim 2, characterized in that: The heating box (7) has several ventilation holes on one side wall at the top. A fan cover (11) is fixedly installed on the inner wall of the heating box (7) near the frame (1). A fan (12) is fixedly installed inside the fan cover (11). A filter screen is provided at the opening of the fan cover (11). One end of the blower pipe (6) is fixedly connected to the fan cover (11).

5. A steam-saving paper machine drying cylinder according to claim 2, characterized in that: The through slots opened on the partition plate one (9) are arranged in a staggered manner from bottom to top, and the partition plate one (9) is fixedly connected to the heat-conducting plate (8) and the inner wall of the heating box (7), and the partition plate two (10) is fixedly connected to the inner wall of the heating box (7) and the heat-conducting plate (8).

6. A steam-saving paper machine drying cylinder according to claim 3, characterized in that: The stud (13) is rotatably connected to the frame (1) via a bearing. The structure of the slider (18) is adapted to the combined structure of the slide groove (19) and the rail groove. The slider (18) is slidably connected to the inner wall of the slide groove (19) and the rail groove respectively. The two ends of the spring (17) are fixedly connected to the top block (16) and the slider (18) respectively.

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