Paper machine net changing device for clean papermaking

Abstract

The utility model discloses a papermaking machine screen changing device for clean papermaking in the technical field of papermaking machines, which comprises a bearing table, moving plates are mounted at two ends of the top of the bearing table, moving plate adjusting mechanisms are arranged between the two moving plates and the bearing table, and rotating shafts are rotatably connected to one sides, close to the center of the bearing table, of the two moving plates. A motor used for driving the rotating shafts to rotate is installed on the outer side of the moving plate at the left end, connecting mechanisms are arranged at the ends, away from the moving plates, of the two rotating shafts, a net cylinder is installed between the two connecting mechanisms, a dry net is wound around the outer side of the net cylinder, and a net cylinder lifting mechanism is arranged in the middle of the bearing table. According to the utility model, the net cylinder can be supported and lifted through the matched arrangement of the net cylinder lifting mechanism, and after the net cylinder is moved to the required height, the net cylinder is mounted through the matched arrangement of the movable plate adjusting mechanism, the connecting mechanism and the movable plate, so that the manpower required for replacing the net cylinder is saved, and a dry net is prevented from hurting a worker.

Description

Technical Field

[0001] This utility model relates to the technical field of papermaking machines, and in particular to a screen changing device for a clean papermaking machine. Background Technology

[0002] A paper machine is a collective term for a complete set of interconnected equipment that forms paper webs from pulp. The paper wire is an accessory on the paper machine, serving as the most important medium for paper web formation and dewatering, playing a crucial role in the quality of the finished paper. It is generally made of woven materials such as copper wire, stainless steel wire, polyester monofilament, or nylon filament, and is a consumable item used in the paper industry for dewatering. During the operation of the paper machine, the paper wire supports and transfers the paper sheets. Running on various rollers, the paper wire experiences friction with the rollers during operation, leading to wear and tear over time. As it carries the paper sheets, pulp and dirt also accumulate on the paper wire, necessitating timely replacement to prevent affecting paper web formation.

[0003] Patent publication number CN221480412U discloses a paper machine wire changing device, including a base with supports on both sides of the upper end. A control box is bolted to the support on the right side of the upper end of the base, and a rotating device that penetrates the support is located inside the control box. A limiting device with a through structure is installed on the support on the left side of the upper end of the base. A detachable cylinder is installed inside the rotating device and the limiting device, and a detachable dry wire is installed on the cylinder. This invention facilitates the installation and removal of the cylinder by installing it inside the rotating device and the limiting device, and allows the dry wire to be changed inside the support without placing the cylinder on the ground, thus protecting the cylinder. However, the above device requires manual support of the cylinder during wire changing. Because the cylinder is large and heavy, wire changing is laborious, and the cylinder can easily injure the operator, resulting in low safety. Utility Model Content

[0004] To address the issues raised by the aforementioned devices, which require manual support of the screen cylinder during screen changing, making the process laborious and potentially dangerous as the cylinder can easily injure operators, this invention provides a screen changing device for a clean papermaking machine.

[0005] This utility model provides a screen changing device for a clean papermaking machine, which adopts the following technical solution:

[0006] A paper machine screen changing device for clean papermaking includes a support platform. Movable plates are installed at both ends of the top of the support platform. Movable plate adjustment mechanisms are provided between the two sets of movable plates and the support platform. Rotary shafts are rotatably connected to the side of the two sets of movable plates near the center of the support platform. A motor for driving the rotation of the rotating shaft is installed on the outer side of the left movable plate. A connecting mechanism is provided at the end of the two sets of rotating shafts away from the movable plates. A screen cylinder is installed between the two sets of connecting mechanisms. Dry wire is wound around the outer side of the screen cylinder. A screen cylinder lifting mechanism is provided in the middle of the support platform.

[0007] The net cylinder lifting mechanism includes a longitudinal electric telescopic rod, which is inserted in the middle of the support platform. A lifting plate is installed on the top of the longitudinal electric telescopic rod, and arc-shaped support plates are installed at both ends of the top of the lifting plate.

[0008] By adopting the above technical solution, the dry net is wound around the surface of the net cylinder. Then, the net cylinder with the dry net wound is placed on top of two sets of arc-shaped support plates. Then, by controlling the extension of the longitudinal electric telescopic rod, the lifting plate is moved upward, which in turn moves the net cylinder upward. When the net cylinder moves to a suitable height, the two sets of moving plates are moved and brought closer to each other by the moving plate adjustment mechanism. The net cylinder is fixedly installed by the connecting mechanism, which saves the manpower required when replacing the net cylinder, thereby avoiding the dry net from injuring the staff and improving the safety of the net replacement device. Then, by starting the motor, the rotating shaft is driven to rotate. The rotation of the rotating shaft drives the net cylinder to rotate through the connecting mechanism, thus enabling the continuous release of the dry net.

[0009] Optionally, a guide mechanism is provided between the lifting plate and the support platform. The guide mechanism includes two sets of guide rods, which are respectively installed at both ends of the bottom of the lifting plate. The bottom of both sets of guide rods extends out of the support platform, and the surface of the support platform is provided with guide holes that match the guide rods.

[0010] By adopting the above technical solution, when the lifting plate is raised or lowered, it can drive the guide rod to slide inside the guide hole, thereby making the lifting plate more stable during the lifting process.

[0011] Optionally, the movable plate adjustment mechanism includes two sets of vertical plates, which are respectively installed at both ends of the top of the support platform. A horizontal electric telescopic rod is inserted through the middle of each set of vertical plates, and the output ends of the two sets of horizontal electric telescopic rods are fixedly connected to the outside of the movable plate.

[0012] By adopting the above technical solution, the horizontal electric telescopic rod can be controlled to extend and retract, thereby driving the two sets of moving plates to move left and right, which facilitates the adjustment of the distance between the two sets of moving plates.

[0013] Optionally, a sliding mechanism is provided between the two sets of movable plates and the support platform. The sliding mechanism includes two sets of pulleys, which are rotatably installed on the bottom of the two sets of movable plates. Slide rails are provided at both ends of the top of the support platform, and the slide rails are slidably connected to the pulleys.

[0014] By adopting the above technical solution, when the moving plate moves left and right, it can drive the pulley to slide inside the slide rail, thereby making the moving plate move more smoothly.

[0015] Optionally, the connecting mechanism includes two sets of connecting brackets, which are respectively installed at one end of the two sets of rotating shafts away from the moving plate. Both ends of the mesh cylinder are connected to connecting blocks that engage with the connecting brackets, and the top of both sets of connecting brackets is provided with a connecting block locking mechanism.

[0016] By adopting the above technical solution, the mesh cylinder can be easily disassembled and assembled through the snap-fit ​​connection of the connecting block and the connecting bracket.

[0017] Optionally, the connecting block locking mechanism includes two sets of fixing rods, which are respectively installed at both ends of the top of the connecting card seat. A fixing plate is installed on the top of the two sets of fixing rods. A spring and a sliding plate are respectively sleeved on the outer side of the two sets of fixing rods, and the spring is located between the fixing plate and the sliding plate. A pin is connected to the bottom of the sliding plate, and a socket is opened on the top of the connecting block to engage with the pin.

[0018] By adopting the above technical solution, when it is necessary to release the fixing effect of the pin on the connecting block, push the slide plate upward. The slide plate slides along the fixed rod and compresses the spring. When the slide plate moves upward, it drives the pin to move upward until the pin separates from the socket.

[0019] Optionally, a dry net flattening mechanism is provided at the top of the support platform near the end of the net cylinder. The dry net flattening mechanism includes two sets of mounting cylinders, which are respectively installed at both ends of the top of the support platform. A screw is screwed to the top of each set of mounting cylinders, and a rocker wheel is installed on the top of each set of screws. A movable block is rotatably connected to the bottom of each set of screws. A mounting block is fixed to the side of each set of movable blocks near the center of the support platform. A limiting groove is opened at the upper end of each set of mounting cylinders near the center of the support platform. A flattening roller is rotatably connected between the two sets of mounting blocks. A fixed roller is rotatably connected to the end of each set of mounting cylinders near the flattening roller, and the fixed roller is located directly below the flattening roller.

[0020] By adopting the above technical solution, after the dry net passes between the flattening roller and the fixed roller, the rocker wheel is rotated. The rotation of the rocker wheel drives the screw to rotate. The rotation of the screw pushes the movable block to move downward. The movement of the movable block drives the mounting block to move downward. The movement of the mounting block drives the flattening roller to move downward, so that the bottom of the flattening roller contacts the top of the dry net. The flattening roller and the fixed roller press against each other to flatten the dry net.

[0021] In summary, this utility model has at least one of the following beneficial effects:

[0022] With the help of the net cylinder lifting mechanism, the net cylinder can be supported and raised and lowered. After the net cylinder is moved to the required height, it can be installed through the coordination of the moving plate adjustment mechanism, the connecting mechanism and the moving plate. This saves manpower required when replacing the net cylinder, thereby avoiding the dry net from injuring the staff and improving the safety of the net replacement device.

[0023] By using a combination of rollers, screws, limit grooves, movable blocks, mounting blocks, flattening rollers, fixed rollers, and mounting cylinders, and by adjusting the distance between the flattening rollers and the fixed rollers, the dry net can be flattened, thereby preventing wrinkles from appearing on the surface of the dry net. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0026] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0027] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point B;

[0028] Figure 4 This is a side view of the pallet structure of this utility model;

[0029] Figure 5 This is a top view of the structure of this utility model.

[0030] In the diagram: 1. Supporting platform; 2. Net cylinder lifting mechanism; 201. Arc-shaped support plate; 202. Lifting plate; 203. Longitudinal electric telescopic rod; 3. Guiding mechanism; 301. Guide rod; 302. Guide hole; 4. Dry net flattening mechanism; 401. Rocker wheel; 402. Screw; 403. Limiting groove; 404. Movable block; 405. Mounting block; 406. Flattening roller; 407. Fixed roller; 408. Mounting cylinder; 5. Sliding mechanism; 501. Sliding... 502. Rail; 6. Pulley; 7. Moving plate adjustment mechanism; 8. Horizontal electric telescopic rod; 9. Vertical plate; 10. Rotating shaft; 11. Dry net; 12. Net cylinder; 13. Connecting mechanism; 14. Connecting block; 15. Connecting bracket; 16. Moving plate; 17. Motor; 18. Connecting block locking mechanism; 19. Fixing plate; 10. Spring; 11. Slide plate; 12. Fixing rod; 13. Pin; 14. Socket. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0032] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 5 This utility model provides an embodiment of a paper machine wire changing device for clean papermaking, comprising a support platform 1. Movable plates 11 are slidably mounted at both ends of the top of the support platform 1. A moving plate adjustment mechanism 6 is provided between each of the two sets of moving plates 11 and the support platform 1. The moving plate adjustment mechanism 6 includes two sets of vertical plates 602, which are respectively fixedly mounted at both ends of the top of the support platform 1. A transverse electric telescopic rod 601 is fixedly inserted through the middle of each set of vertical plates 602. The output ends of both sets of transverse electric telescopic rods 601 are fixedly connected to the outer side of the moving plates 11. By controlling the extension and retraction of the transverse electric telescopic rods 601, the two sets of moving plates 11 can be moved left and right, thereby facilitating the adjustment of the distance between the two sets of moving plates 11.

[0033] Please refer to the attached diagram in the instruction manual. Figure 1 A sliding mechanism 5 is provided between the two sets of movable plates 11 and the support platform 1. The sliding mechanism 5 includes two sets of pulleys 502, which are rotatably installed on the bottom of the two sets of movable plates 11. Slide rails 501 are provided at both ends of the top of the support platform 1, and the slide rails 501 are slidably connected to the pulleys 502. When the movable plates 11 move left and right, they can drive the pulleys 502 to slide inside the slide rails 501, thereby making the movement of the movable plates 11 smoother.

[0034] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 3Two sets of movable plates 11 are rotatably connected to a rotating shaft 7 on the side near the center of the support platform 1. A motor 12 for driving the rotating shaft 7 is installed on the outer side of the left movable plate 11. A connecting mechanism 10 is provided at the end of each rotating shaft 7 opposite to the movable plate 11. A mesh cylinder 9 is installed between the two connecting mechanisms 10. The connecting mechanism 10 includes two sets of connecting brackets 1002, which are respectively fixedly installed at the ends of the two rotating shafts 7 opposite to the movable plate 11. Both ends of the mesh cylinder 9 are fixedly connected to connecting blocks 1001 that engage with the connecting brackets 1002. A connecting block locking mechanism 13 is provided on the top of each of the two connecting brackets 1002. The engaging engagement of the connecting blocks 1001 and the connecting brackets 1002 facilitates the assembly and disassembly of the mesh cylinder 9.

[0035] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 3 The connecting block locking mechanism 13 includes two sets of fixing rods 1304, which are respectively fixedly installed at both ends of the top of the connecting bracket 1002. A fixing plate 1301 is fixedly installed on the top of both sets of fixing rods 1304. A spring 1302 and a sliding plate 1303 are respectively sleeved on the outer sides of the two sets of fixing rods 1304, with the spring 1302 located between the fixing plate 1301 and the sliding plate 1303. A pin 1305 is fixedly connected to the bottom of the sliding plate 1303. A socket 1306 is provided on the top of the connecting block 1001 to engage with the pin 1305. When it is necessary to release the fixing effect of the pin 1305 on the connecting block 1001, the sliding plate 1303 is pushed upwards. The sliding plate 1303 slides along the fixing rods 1304 and compresses the spring 1302. As the sliding plate 1303 moves upwards, it drives the pin 1305 upwards until the pin 1305 separates from the socket 1306.

[0036] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 2A dry net 8 is wrapped around the outside of the net cylinder 9. A dry net flattening mechanism 4 is provided at the top of the support platform 1 near the end of the net cylinder 9. The dry net flattening mechanism 4 includes two sets of mounting cylinders 408. The two sets of mounting cylinders 408 are respectively fixedly installed at both ends of the top of the support platform 1. A screw 402 is screwed to the top of each of the two sets of mounting cylinders 408. A rocker wheel 401 is fixedly installed on the top of each of the two sets of screws 402. A movable block 404 is rotatably connected to the bottom of each of the two sets of movable blocks 404. An mounting block 405 is fixed on the side of each of the two sets of movable blocks 404 near the center of the support platform 1. A limiting groove 403 is opened at the upper end of each of the two sets of mounting cylinders 408 near the center of the support platform 1. A flattening roller 406 is rotatably connected between the two sets of mounting blocks 405. A fixed roller 407 is rotatably connected to the end of each of the two sets of mounting cylinders 408 near the flattening roller 406, and the fixed roller 407 is located directly below the flattening roller 406. After the dry web 8 passes between the flattening roller 406 and the fixed roller 407, the rocker wheel 401 is rotated. The rotation of the rocker wheel 401 drives the screw 402 to rotate. The rotation of the screw 402 pushes the movable block 404 to move downward. The downward movement of the movable block 404 drives the mounting block 405 to move downward. The downward movement of the mounting block 405 drives the flattening roller 406 to move downward, so that the bottom of the flattening roller 406 contacts the top of the dry web 8. The dry web 8 is flattened by the mutual squeezing of the flattening roller 406 and the fixed roller 407.

[0037] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 4 and Figure 5 A net cylinder lifting mechanism 2 is provided in the middle of the support platform 1. The net cylinder lifting mechanism 2 includes a longitudinal electric telescopic rod 203, which is fixedly inserted in the middle of the support platform 1. A lifting plate 202 is fixedly installed on the top of the longitudinal electric telescopic rod 203. A guide mechanism 3 is provided between the lifting plate 202 and the support platform 1. The guide mechanism 3 includes two sets of guide rods 301, which are respectively fixedly installed at both ends of the bottom of the lifting plate 202. The bottom of both sets of guide rods 301 extends out of the support platform 1. The surface of the support platform 1 is provided with guide holes 302 that match the guide rods 301. When the lifting plate 202 is raised or lowered, it can drive the guide rods 301 to slide inside the guide holes 302, thereby making the lifting plate 202 more stable during the raising and lowering process. Arc-shaped support plates 201 are fixedly installed at both ends of the top of the lifting plate 202.

[0038] Working principle: In use, the dry net 8 is first wound around the surface of the net cylinder 9. Then, the net cylinder 9 with the dry net 8 wound around it is placed on top of the two sets of arc-shaped support plates 201. Then, by controlling the extension of the longitudinal electric telescopic rod 203, the lifting plate 202 is moved upward, which in turn moves the net cylinder 9 upward. When the net cylinder 9 moves to a suitable height, the two sets of transverse electric telescopic rods 601 are controlled to extend, which moves the two sets of moving plates 11 and brings them closer together. When the two sets of moving plates 11 move, they also move the two sets of connecting brackets 1002 and bring them closer together. When the two sets of connecting brackets 1002 are moved, the staff pushes the slide plate 1303 upward. The upward movement of the slide plate 1303 causes the pin 1305 to move upward and compresses the spring 1302 until the connecting bracket 1002 and the connecting block 1001 are engaged with each other. Then the slide plate 1303 is released, and under the elastic force of the spring 1302, the slide plate 1303 is pushed downward, which in turn causes the pin 1305 to be inserted into the socket 1306. The connecting block 1001 is locked by the pin 1305, thereby fixing the mesh cylinder 9 in place.

[0039] Then, the longitudinal electric telescopic rod 203 is controlled to retract, causing the arc-shaped support plate 201 to descend. At the same time, one end of the dry net 8 passes between the flattening roller 406 and the fixed roller 407. At this time, the operator turns the rocker wheel 401. The rotation of the rocker wheel 401 drives the screw 402 to rotate. The rotation of the screw 402 pushes the movable block 404 to move downward. The downward movement of the movable block 404 drives the flattening roller 406 to move downward through the mounting block 405 until the bottom of the flattening roller 406 contacts the top of the dry net 8. The flattening roller 406 and the fixed roller 407 press against each other to flatten the dry net 8. Then, the motor 12 is started. When the motor 12 is working, it drives the rotating shaft 7 to rotate. The rotation of the rotating shaft 7 drives the net cylinder 9 to rotate through the connecting mechanism 10, thus enabling the continuous release of the dry net 8.

[0040] 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 included within the scope of protection of this utility model.

Claims

1. A wire changing device for a clean papermaking machine, comprising a support platform (1), characterized in that: Movable plates (11) are installed at both ends of the top of the support platform (1). Movable plate adjustment mechanism (6) is provided between the two sets of movable plates (11) and the support platform (1). Rotary shaft (7) is rotatably connected to the side of the two sets of movable plates (11) near the center of the support platform (1). A motor (12) for driving the rotating shaft (7) is installed on the outside of the left movable plate (11). A connecting mechanism (10) is provided at the end of the two sets of rotating shafts (7) away from the movable plates (11). A net cylinder (9) is installed between the two sets of connecting mechanisms (10). Dry net (8) is wrapped around the outside of the net cylinder (9). A net cylinder lifting mechanism (2) is provided in the middle of the support platform (1). The net cylinder lifting mechanism (2) includes a longitudinal electric telescopic rod (203), which is inserted in the middle of the support platform (1). A lifting plate (202) is installed on the top of the longitudinal electric telescopic rod (203), and arc-shaped support plates (201) are installed at both ends of the top of the lifting plate (202).

2. The screen changing device for a clean papermaking machine according to claim 1, characterized in that: A guide mechanism (3) is provided between the lifting plate (202) and the support platform (1). The guide mechanism (3) includes two sets of guide rods (301). The two sets of guide rods (301) are respectively installed at both ends of the bottom of the lifting plate (202). The bottom of the two sets of guide rods (301) extends out of the support platform (1). The surface of the support platform (1) is provided with guide holes (302) that match the guide rods (301).

3. The screen changing device for a clean papermaking machine according to claim 1, characterized in that: The movable plate adjustment mechanism (6) includes two sets of vertical plates (602), which are respectively installed at both ends of the top of the support platform (1). A horizontal electric telescopic rod (601) is inserted in the middle of each of the two sets of vertical plates (602), and the output ends of the two sets of horizontal electric telescopic rods (601) are fixedly connected to the outside of the movable plate (11).

4. The paper machine screen changing device for clean papermaking according to claim 1, characterized in that: A sliding mechanism (5) is provided between the two sets of movable plates (11) and the support platform (1). The sliding mechanism (5) includes two sets of pulleys (502). The two sets of pulleys (502) are rotatably installed on the bottom of the two sets of movable plates (11). Slide rails (501) are provided at both ends of the top of the support platform (1). The slide rails (501) and pulleys (502) are slidably connected.

5. A screen changing device for a clean papermaking machine according to claim 1, characterized in that: The connecting mechanism (10) includes two sets of connecting brackets (1002). The two sets of connecting brackets (1002) are respectively installed on one end of the two sets of rotating shafts (7) away from the moving plate (11). Both ends of the net cylinder (9) are connected to connecting blocks (1001) that engage with the connecting brackets (1002). The top of the two sets of connecting brackets (1002) is provided with a connecting block locking mechanism (13).

6. A screen changing device for a clean papermaking machine according to claim 5, characterized in that: The connecting block locking mechanism (13) includes two sets of fixing rods (1304). The two sets of fixing rods (1304) are respectively installed at both ends of the top of the connecting card seat (1002). The top of the two sets of fixing rods (1304) is jointly installed with a fixing plate (1301). The outer sides of the two sets of fixing rods (1304) are respectively fitted with springs (1302) and sliding plates (1303). The springs (1302) are located between the fixing plates (1301) and the sliding plates (1303). The bottom of the sliding plates (1303) is connected with a pin (1305). The top of the connecting block (1001) is provided with a socket (1306) that is engaged with the pin (1305).

7. A screen changing device for a clean papermaking machine according to claim 1, characterized in that: A dry net flattening mechanism (4) is provided at one end of the top of the support platform (1) near the net cylinder (9). The dry net flattening mechanism (4) includes two sets of mounting cylinders (408). The two sets of mounting cylinders (408) are respectively installed at both ends of the top of the support platform (1). The top of each set of mounting cylinders (408) is screwed with a screw rod (402). The top of each set of screw rods (402) is equipped with a rocker wheel (401). The bottom of each set of screw rods (402) is rotatably connected with a movable block (404). The movable block (404) is fixed with an installation block (405) on the side near the center of the support platform (1). The upper end of the two sets of installation cylinders (408) near the center of the support platform (1) is fitted with a limiting groove (403). The two sets of installation blocks (405) are rotatably connected with a flattening roller (406). The two sets of installation cylinders (408) are rotatably connected with a fixed roller (407) at the end near the flattening roller (406), and the fixed roller (407) is located directly below the flattening roller (406).

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