Tensioning device for flat filament dry net of paper machine

Abstract

The utility model relates to the technical field of tensioning devices, and discloses a paper machine flat filament dry net tensioning device which comprises a conveying device and a tension detection roller, first square bearing seats are fixedly connected to roller cores at the front end and the rear end of the tension detection roller in a sleeved mode, and tensioning grooves are formed in the middles of the front end and the rear end of the conveying device. The first square bearing seats penetrate through and are slidably connected into the tensioning grooves, the positions, close to the outer sides, of roller cores of the front end and the rear end of the tension detection roller are fixedly sleeved with second square bearing seats, the positions, on the left sides of the tensioning grooves, of the front end and the rear end of the conveying equipment are fixedly provided with rotating seats, and the rotating seats are fixedly sleeved with transmission levers. An adjusting groove is formed in the middle of each transmission lever. According to the device, the resolution ratio and the sensitivity of tension degree adjustment are improved, the separation efficiency can be remarkably improved through the separation roller, the defects of paper wrinkles, paper tearing and the like are reduced, the overall rigidity of a dry net is enhanced through multi-point limiting, and the form stability of the dry net under high-speed operation is ensured.

Description

A paper machine flat wire tensioning device Technical Field

[0001] This utility model relates to the field of tensioning device technology, and in particular to a tensioning device for flat wire dry wire of a papermaking machine. Background Technology

[0002] In the papermaking industry, flat wire dryer, as a key transmission component in the drying section, requires precise tension control for paper quality, production efficiency, and equipment stability. Existing technologies, such as traditional manual adjustment or screw-driven tensioning devices, have gradually revealed limitations in practical applications. For example, manual adjustment relies on operator experience and is difficult to achieve dynamic real-time control. In high-speed papermaking machines or production environments with significant humidity and temperature fluctuations, tension adjustment may be delayed or uneven. While some screw-driven structures can achieve a degree of automation, their fixed transmission ratio limits their ability to amplify minute displacements, potentially leading to insufficient adjustment precision in scenarios requiring high-precision fine-tuning.

[0003] Furthermore, in the separation process between the flat wire and the dried paper, the separation effect of traditional peeling rollers is greatly affected by the uniformity of the wire tension and the adhesion between the paper and the wire. Insufficiently precise control of wire tension can lead to wrinkles, tears, or residue on the paper during separation, affecting the quality of the finished product. Moreover, the paper remains in its previous adhesive state before passing through the peeling rollers; direct separation may cause some fibers on the freshly dried paper to break, also impacting the quality of the finished product. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a paper machine flat wire tensioning device, which has the advantages of precise adjustment, optimized separation, and more stable transportation, and solves some of the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a paper machine flat wire tensioning device, including a conveying device and a tension detection roller. A square bearing seat is fixedly sleeved at both ends of the tension detection roller. A tensioning groove is provided at the middle of both ends of the conveying device. The square bearing seat passes through and is slidably connected inside the tensioning groove. A second square bearing seat is fixedly sleeved near the outer side of both ends of the tension detection roller. A rotating seat is fixedly installed on the left side of the tensioning groove at both ends of the conveying device. A transmission lever is fixedly sleeved on each rotating seat. An adjusting groove is provided at the middle of each transmission lever. The second square bearing seat passes through and is slidably connected inside the adjusting groove. A sliding rod is rotatably installed between the two sets of transmission levers at the middle of the right end. A sliding groove is provided near the right side of both ends of the conveying device. The sliding rod passes through and is slidably connected inside the sliding groove.

[0006] Furthermore, a servo electric push rod is fixedly installed at the middle of the upper end of the square bearing seat, and a base plate is fixedly installed between the upper ends of the servo electric push rod. The front and rear ends of the base plate are slidably connected to the tension groove. A separating roller is rotatably installed on the upper end of the base plate. The rotating installation of the separating roller reduces the friction between it and the flat wire dry mesh belt.

[0007] Furthermore, the conveying equipment has main conveyor rollers rotatably installed inside, near the left and right sides, and flat wire mesh belts are arranged between the main conveyor rollers. The main conveyor rollers are connected by the flat wire mesh belts.

[0008] Furthermore, the conveying equipment has a limit roller 1 rotatably installed inside near the main conveying roller, and a limit roller 2 rotatably installed inside the conveying equipment on both the left and right sides near the separating roller. The lower end of the flat wire dry mesh belt passes around the limit roller 1, the limit roller 2 and the tension detection roller in sequence from both sides to the middle. The tension detection roller can not only detect data in real time, but also act as a tensioning roller.

[0009] Furthermore, a second servo electric push rod is rotatably mounted on the outer side of the slide rod at the middle position. The lower cylinder of the second servo electric push rod is rotatably mounted between the cylinder and the conveying equipment. The tension detection roller, the first servo electric push rod, and the second servo electric push rod are all electrically connected to a matching PLC control system, which enables intelligent automated control.

[0010] The advantages of this utility model are as follows:

[0011] 1. By using a servo-electric push rod to drive the transmission lever structure and lever displacement amplification effect, the precise control quantity of the servo system can be converted into a small lifting stroke of the tension detection roller. Compared with the traditional screw drive or manual adjustment method, this effectively improves the resolution and sensitivity of tension adjustment. At the same time, combined with the feedback processing of real-time detection data by the PLC control system, it can dynamically match changes in parameters such as paper machine running speed and paper web humidity, realizing automated closed-loop control of flat wire tension. This avoids uneven tension caused by human experience error or mechanical transmission lag, thereby improving the stability of the paper drying process and the uniformity of finished product quality.

[0012] 2. The separating roller, driven independently by the servo electric push rod, can slightly lift the flat wire dry wire belt, forming a localized micro-arc. During the dry wire transport process, it pre-separates the semi-finished paper, reducing the adhesion between the paper and the dry wire. When used in conjunction with the peeling roller in the drying section, it can significantly improve separation efficiency and reduce defects such as paper wrinkles and tears. In addition, the limiting rollers one and two provide a stable support reference surface for the dry wire by fitting and limiting the upper and lower ends of the dry wire, effectively suppressing lateral deviation or slack fluctuations during the operation of the dry wire. Especially after the tension adjustment is completed, the overall rigidity of the dry wire can be enhanced through multi-point limiting, ensuring its morphological stability under high-speed operation and reducing the risk of paper breakage caused by dry wire shaking. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 is an enlarged structural schematic diagram of point A in Figure 1 of this utility model;

[0016] Figure 4 is a schematic diagram of the internal side view structure of this utility model.

[0017] In the diagram: 1. Conveying equipment; 2. Tension detection roller; 3. Square bearing seat one; 4. Tensioning groove; 5. Square bearing seat two; 6. Transmission lever; 7. Adjusting groove; 8. Slide rod; 9. Slide groove; 10. Servo electric push rod one; 11. Base plate; 12. Separating roller; 13. Main conveyor roller; 14. Flat wire dry mesh belt; 15. Limiting roller one; 16. Limiting roller two; 17. Servo electric push rod two; 18. Rotating seat. Detailed Implementation

[0018] 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.

[0019] Please refer to Figures 1-4. A tensioning device for flat wire dryer of a papermaking machine includes a conveying device 1 and a tension detection roller 2. Square bearing seats 3 are fixedly sleeved at both ends of the roller core of the tension detection roller 2. Tensioning grooves 4 are provided at the middle of both ends of the conveying device 1. The square bearing seats 3 pass through and are slidably connected inside the tensioning grooves 4. Square bearing seats 5 are fixedly sleeved near the outer side of both ends of the roller core of the tension detection roller 2. Rotating seats 18 are fixedly installed on the left side of the tensioning grooves 4 at both ends of the conveying device 1. Transmission levers 6 are fixedly sleeved on each rotating seat 18. Each transmission lever 6 has an adjusting groove 7 at its center. A second square bearing seat 5 passes through and is slidably connected inside the adjusting groove 7. A sliding rod 8 is rotatably mounted between the two sets of transmission levers 6 at the center of their right ends. Slide grooves 9 are provided at both ends of the conveying device 1 near the right side. The sliding rod 8 passes through and is slidably connected inside the slide groove 9. A second servo electric push rod 17 is rotatably mounted on the outer side of the sliding rod 8 at its center. The lower cylinder of the second servo electric push rod 17 is rotatably mounted between it and the conveying device 1. The tension detection roller 2, the first servo electric push rod 10, and the second servo electric push rod 17 are all electrically connected. Equipped with a PLC control system, the output of the servo electric push rod 17 can be activated to drive the slide rod 8 to slide inside the slide groove 9. The sliding of the slide rod 8 drives the transmission lever 6 to rotate around the rotating seat 18. When the transmission lever 6 rotates upwards, the tension detection roller 2 is limited and guided by the square bearing seat 3 and the tension groove 4. Therefore, the square bearing seat 5 will move upwards under the limiting and supporting effect of the adjusting groove 7, ultimately driving the tension detection roller 2 to move upwards. Conversely, the same principle applies when the transmission lever 6 rotates downwards, ultimately driving the tension detection roller... 2. Moves downward and remains stable under the support of structures such as the transmission lever 6. Then, the tension of the flat wire dry mesh belt 14 is adjusted by raising and lowering the tension detection roller 2. Compared with some current manual or screw-driven lifting devices, this device amplifies the displacement of the output end through the design of the transmission lever 6, thereby improving the accuracy of the device when adjusting the tension. Furthermore, the PLC control system can strictly control the output of the servo electric push rod 17 based on the real-time detection data of the tension detection roller 2, ensuring the safety of the device during adjustment.

[0020] Please refer to Figures 2-4. Servo electric push rods 10 are fixedly installed at the upper center of the square bearing seat 3. A base plate 11 is fixedly installed between the upper ends of the servo electric push rods 10. Both ends of the base plate 11 are slidably connected to the tensioning groove 4. A separating roller 12 is rotatably installed on the upper end of the base plate 11. Main conveyor rollers 13 are rotatably installed near the left and right sides inside the conveying device 1. Flat wire mesh belts 14 are arranged between the main conveyor rollers 13, and the main conveyor rollers 13 are connected by the flat wire mesh belts 14. Limit rollers 15 are rotatably installed near the main conveyor rollers 13 inside the conveying device 1. Limit rollers 16 are rotatably installed near the left and right sides of the separating roller 12 inside the conveying device 1. The lower end of the flat wire mesh belt 14 is arranged sequentially from the sides to the middle. By bypassing the first limiting roller 15, the second limiting roller 16, and the tension detection roller 2, the servo electric push rod 10 can drive the base plate 11 to raise the separating roller 12. This allows the upper end of the separating roller 12 to lift the flat wire dry wire belt 14 by a slight arc. As the flat wire dry wire belt 14 and the semi-finished paper on it pass through the separating roller 12, the semi-finished paper can be pre-separated, thereby improving the separation effect and paper quality when separated by the peeling roller in the drying section of the paper machine. In addition, the limiting action of the first limiting roller 15 and the second limiting roller 16 allows the lower end of the flat wire dry wire belt 14 to fit with its upper end, providing a certain degree of support. After adjusting the tension, the stability of the flat wire dry wire belt 14 can be further improved.

[0021] Working principle: By opening the servo electric push rod 17, its output end drives the slide rod 8 to slide inside the slide groove 9. The sliding of the slide rod 8 drives the transmission lever 6 to rotate around the rotating seat 18. When the transmission lever 6 rotates upward, the tension detection roller 2 is limited and guided by the square bearing seat 3 and the tension groove 4. Therefore, the square bearing seat 5 will move upward under the limiting and supporting effect of the adjusting groove 7, thus ultimately driving the tension detection roller 2 to move upward. Conversely, the same principle applies when the transmission lever 6 rotates downward, which will ultimately drive the tension detection roller 2 to move downward. Under the support of the transmission lever 6 and other structures, it remains stable, and thus the tension detection roller 2 is lifted. The tension of the flat wire dry mesh belt 14 can be adjusted. Furthermore, by opening the servo electric push rod 10, the base plate 11 can be driven to raise the separation roller 12, so that the upper end of the separation roller 12 can lift the flat wire dry mesh belt 14 by a small arc. Thus, when the flat wire dry mesh belt 14 and the semi-finished paper on it pass through the separation roller 12, the semi-finished paper can be pre-separated. In addition, the limiting action of the limiting roller 15 and the limiting roller 2 16 can make the lower end of the flat wire dry mesh belt 14 fit with its upper end, providing a certain support. After adjusting the tension, the stability of the flat wire dry mesh belt 14 can be better improved.

Claims

1. A paper machine flat wire tensioning device, comprising a conveying device (1) and a tension detection roller (2), characterized in that: Square bearing seat 1 (3) is fixedly sleeved at the front and rear ends of the tension detection roller (2). Tension groove (4) is provided at the middle of the front and rear ends of the conveying device (1). Square bearing seat 1 (3) is slidably connected inside the tension groove (4). Square bearing seat 2 (5) is fixedly sleeved at the front and rear ends of the tension detection roller (2) near the outer side. Rotating seat (18) is fixedly installed at the left side of the tension groove (4) at the front and rear ends of the conveying device (1). Transmission lever (6) is fixedly sleeved on the rotating seat (18). Adjustment groove (7) is provided at the middle of the transmission lever (6). Square bearing seat 2 (5) is slidably connected inside the adjustment groove (7). A sliding rod (8) is rotatably installed between the two sets of transmission levers (6) at the middle of the right end. Sliding groove (9) is provided at the front and rear ends of the conveying device (1) near the right side. Sliding rod (8) is slidably connected inside the sliding groove (9).

2. A wire drawing machine flat wire net tensioning device according to claim 1, characterized in that: Servo electric push rods (10) are fixedly installed at the middle of the upper end of the square bearing seat (3). A base plate (11) is fixedly installed between the upper ends of the servo electric push rods (10). The front and rear ends of the base plate (11) are slidably connected to the tension groove (4). A separation roller (12) is rotatably installed on the upper end of the base plate (11).

3. A flat wire dryer fabric tensioning device according to claim 1 wherein: The conveying device (1) has main conveyor rollers (13) rotatably installed inside near the left and right sides. Flat wire dry mesh belts (14) are arranged between the main conveyor rollers (13), and the main conveyor rollers (13) are connected by the flat wire dry mesh belts (14).

4. A flat wire dryer fabric tensioning device according to claim 3 wherein: Inside the conveying device (1), a limiting roller one (15) is rotatably installed near the main conveying roller (13). Inside the conveying device (1), a limiting roller two (16) is rotatably installed on both the left and right sides near the separating roller (12). The lower end of the flat wire dry mesh belt (14) passes around the limiting roller one (15), the limiting roller two (16) and the tension detection roller (2) in sequence from both sides to the middle.

5. The paper machine flat wire tensioning device according to claim 1, characterized in that: A servo electric push rod two (17) is rotatably installed on the outer side of the slide rod (8) at the middle. The lower cylinder of the servo electric push rod two (17) is rotatably installed between the conveying equipment (1). The tension detection roller (2), the servo electric push rod one (10) and the servo electric push rod two (17) are all electrically connected to a matching PLC control system.

Images