A paper machine press dewatering device

Abstract

The utility model relates to papermaking technical field, concretely discloses a kind of paper machine squeezing dewatering device, including two left and right distribution's vertical plate, the opposite side of two vertical plate is rotatably connected with first rotating shaft by the bearing of embedding installation, upper press roll is fixedly connected between two first rotating shaft, the opposite side of two vertical plate is all perforated with rectangular slot, the inside of two rectangular slots is all provided with support block;Paper web is rotated to reduce conveying friction force by press roll, to automatically adapt the squeezing requirement of different thickness paper web, improve the process flexibility and production adaptability of device, increase the number or weight of counterweight disc can increase pressure, prevent insufficient dehydration, reduce the number or use lightweight counterweight disc of counterweight disc can reduce pressure, avoid paper web to be crushed, limit rod prevent counterweight disc from falling to guarantee safety.This mode can accurately control the pressure between upper press roll and lower press roll, effectively guarantee the stability of squeezing process and paper quality.

Description

Technical Field

[0001] This utility model relates to the field of papermaking technology, and specifically discloses a papermaking machine press dewatering device. Background Technology

[0002] In papermaking, pressing and dewatering are crucial processes that determine paper quality and production efficiency. The wet paper web formed after papermaking needs to undergo a pressing process to remove most of the free water, thereby improving paper dryness, fiber bonding, and reducing energy consumption in subsequent drying stages. The core of pressing and dewatering is applying pressure to the wet paper web using pressure rollers to separate water from it. This process directly affects the paper's thickness, density, strength, and other physical properties, thus placing extremely high demands on the structural design of the pressing equipment and the precision of pressure control.

[0003] In existing technologies, paper machine press dewatering devices generally employ a combination of upper and lower pressure rollers to squeeze and dewater the wet paper web. Some traditional devices use a fixed spacing design for structural simplicity, making it difficult to dynamically adjust the spacing according to paper web thickness, resulting in poor flexibility and adaptability. Other devices, while equipped with spacing adjustment functions, often rely on manual screw mechanisms, making it difficult to control the clamping force between the rollers. This can easily lead to insufficient dewatering due to insufficient pressure, or paper web crushing due to excessive pressure, severely impacting paper quality and production stability.

[0004] Therefore, a paper machine press dewatering device is needed to solve the above problems. Utility Model Content

[0005] This invention proposes a paper machine pressing and dewatering device that can adapt to the pressing needs of paper webs of different thicknesses, significantly improving the device's process flexibility and production adaptability. Furthermore, it can control the clamping force between the upper and lower pressure rollers according to the paper web thickness and actual production needs, which can avoid insufficient dewatering caused by insufficient pressure and prevent paper web crushing caused by excessive pressure, effectively ensuring the stability of the pressing process and the quality of the paper.

[0006] This utility model is implemented as follows: a paper machine pressing and dewatering device includes two vertical plates distributed on the left and right. Each of the two vertical plates is rotatably connected to a first rotating shaft via an embedded bearing on its opposite side. An upper pressure roller is fixedly connected between the two first rotating shafts. Each of the two vertical plates has a rectangular groove through it on its opposite side. A support block is provided inside each of the two rectangular grooves. Each of the two support blocks is rotatably connected to a second rotating shaft via an embedded bearing on its opposite side. A lower pressure roller is fixedly connected between the two second rotating shafts. A pressure applying mechanism is provided on the opposite side of each of the two vertical plates.

[0007] The pressure-applying mechanism includes a U-shaped frame fixedly connected to the outer wall of the upright plate. Two left and right support wheels are rotatably connected inside the U-shaped frame. A connecting lug is fixedly connected to the outer wall of the support block. A steel wire rope that abuts against the two support wheels is fixedly connected to the upper end of the connecting lug. Two discs are arranged below the U-shaped frame. An arc-shaped fixing plate is fixedly connected between the outer walls of the two discs. The other end of the steel wire rope is fixedly connected to the upper disc. A limit rod is fixedly connected to the upper end of the lower disc. Multiple counterweight discs are arranged between the two discs and sleeved on the outside of the limit rod.

[0008] In a preferred embodiment of the paper machine pressing and dewatering device of this utility model, a flat plate is fixedly connected to one side of each of the two vertical plates facing away from each other, and a guide block is fixedly connected to one side of each of the two arc-shaped fixed plates facing away from each other. A slide rod is fixedly connected to the upper end of the flat plate, passing through the guide block and slidably connected to the guide block.

[0009] As a preferred embodiment of the paper machine pressing and dewatering device of this utility model, slide rails are installed on both the front and rear sides of the inner walls of the two rectangular grooves, and the support block is slidably connected to the inside of the rectangular grooves through the two slide rails.

[0010] As a preferred embodiment of the paper machine pressing and dewatering device of this utility model, a connecting plate is fixedly connected between the upper sides of the two opposing sides of the two vertical plates, and a connecting block is fixedly connected between the lower sides of the two opposing sides of the two vertical plates. A conical groove is opened through the upper end of the connecting block, and a drainage frame communicating with the conical groove is fixedly connected to the lower end of the connecting block.

[0011] As a preferred embodiment of the paper machine pressing and dewatering device of this utility model, both the upper and lower pressure rollers are hollow structures.

[0012] In a preferred embodiment of the paper machine pressing and dewatering device of this utility model, the distance between the upper end of the limiting rod and the lower end of the upper disc is greater than the thickness of the counterweight disc.

[0013] As a preferred embodiment of the paper machine pressing and dewatering device of this utility model, the lower ends of the two flat plates are fixedly connected to a mounting bracket with multiple mounting holes.

[0014] The beneficial effects of this utility model are:

[0015] 1. During the wet paper web conveying process, the paper web contacts the upper pressure roller. The weight of the counterweight plate is transmitted to the steel wire rope through the disc. After the steel wire rope is turned by the support wheel, it is pulled upward, providing an upward pulling force to the lower pressure roller. This causes the lower pressure roller to cooperate with the upper pressure roller to form a pressing force. During this process, the pressure roller rotates with the paper web, reducing the conveying friction, thereby automatically adapting to the pressing requirements of paper webs of different thicknesses, significantly improving the process flexibility and production adaptability of the equipment.

[0016] 2. Pressure can be adjusted by increasing or decreasing the number of counterweights on the limit rod or by replacing them with counterweights of different weights. Increasing the number or weight of counterweights increases the clamping force, preventing insufficient dewatering; decreasing the number of counterweights or using lighter counterweights decreases the clamping force, preventing paper web crushing. During operation, ensure that the weight of the counterweights on both sides is equal, and use the limit rod to prevent the counterweights from slipping, ensuring safety. This method can precisely control the clamping force between the upper and lower pressure rollers, effectively ensuring the stability of the pressing process and paper quality. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front sectional view of the overall structure of a paper machine pressing and dewatering device according to the present invention.

[0019] Figure 2 This is an external structural diagram of the disc portion of this utility model;

[0020] Figure 3 This is a diagram showing the external structure of the support wheel of this utility model;

[0021] Figure 4 This is an external structural diagram of the connecting block and drainage frame of this utility model.

[0022] The markings in the diagram are: 1. Vertical plate; 2. First rotating shaft; 3. Upper pressure roller; 4. Rectangular groove; 5. Support block; 6. Second rotating shaft; 7. Lower pressure roller; 8. U-shaped frame; 9. Support wheel; 10. Connecting ear plate; 11. Steel wire rope; 12. Disc; 13. Arc-shaped fixing plate; 14. Limiting rod; 15. Counterweight plate; 16. Guide block; 17. Sliding rod; 18. Connecting block; 19. Drainage frame; 20. Flat plate; 21. Connecting plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4A paper machine pressing and dewatering device includes two vertical plates 1 distributed on the left and right. The two vertical plates 1 are rotatably connected to a first rotating shaft 2 through an embedded bearing on their opposite sides. An upper pressure roller 3 is fixedly connected between the two first rotating shafts 2. A rectangular groove 4 is opened through the two vertical plates 1 on their opposite sides. A support block 5 is provided inside the two rectangular grooves 4. A second rotating shaft 6 is rotatably connected to the two support blocks 5 on their opposite sides through an embedded bearing. A lower pressure roller 7 is fixedly connected between the two second rotating shafts 6. A pressure application mechanism is provided on the opposite sides of the two vertical plates 1.

[0025] The pressure-applying mechanism includes a U-shaped frame 8 fixedly connected to the outer wall of the upright plate 1. Two left and right support wheels 9 are rotatably connected inside the U-shaped frame 8. A connecting ear plate 10 is fixedly connected to the outer wall of the support block 5. A steel wire rope 11 that abuts against the two support wheels 9 is fixedly connected to the upper end of the connecting ear plate 10. Two discs 12 are arranged below the U-shaped frame 8. An arc-shaped fixing plate 13 is fixedly connected between the outer walls of the two discs 12. The other end of the steel wire rope 11 is fixedly connected to the upper disc 12. A limit rod 14 is fixedly connected to the upper end of the lower disc 12. Multiple counterweight discs 15 are arranged between the two discs 12 and sleeved on the outside of the limit rod 14.

[0026] In this embodiment: the two support wheels 9 inside the U-shaped frame 8 serve as the turning fulcrum of the wire rope 11, and the arc-shaped fixing plate 13 connects the upper and lower discs 12, thereby bearing the weight of the counterweight disc 15. Since the support wheels 9 are rotatably connected to the U-shaped frame 8, the friction force when the wire rope 11 is pulled can be reduced.

[0027] During the conveying of the wet paper web with the blanket or mesh belt, it comes into contact with the lower side of the outer wall of the upper pressure roller 3. The weight of the counterweight plate 15 is transmitted to the wire rope 11 through the upper disc 12. The weights of the left and right counterweight plates 15 are equal. After the wire rope 11 is turned by the support wheel 9, it is pulled upward to connect the ear plate 10, thereby providing an upward pulling force to the support block 5. The second rotating shaft 6 causes the lower pressure roller 7 to come into close contact with the paper web, forming the pressing force required for pressing with the upper pressure roller 3. During the conveying process, the friction causes the upper pressure roller 3 to rotate with the two first rotating shafts 2, while the lower pressure roller 7 rotates with the two second rotating shafts 6, thereby reducing the friction of the paper web conveying and pressing the moisture of the wet paper web. In this way, it can automatically adapt to the pressing requirements of paper webs of different thicknesses, significantly improving the process flexibility and production adaptability of the device.

[0028] Depending on the paper web thickness and dewatering requirements, pressure can be adjusted by increasing or decreasing the number of counterweights 15 on the limit rod 14 or by replacing them with counterweights 15 of different weights. To increase the clamping force, increase the number of counterweights 15 or replace them with heavier counterweights 15 to prevent insufficient squeezing pressure. The limit rod 14 also limits the counterweights 15, preventing them from slipping and improving safety. To decrease the clamping force, reduce the number of counterweights 15 or replace them with lighter counterweights 15 to avoid paper web crushing due to excessive pressure. When removing the counterweight plate 15, simply lift the upper counterweight plate 15 upwards to disengage it from the limiting rod 14. If it is necessary to increase the number of counterweight plates 15, simply place the counterweight plates 15 onto the outer wall of the limiting rod 14. During this process, it is necessary to ensure that the weight of the counterweight plates 15 on both sides is equal. In this way, the pressing force between the upper pressure roller 3 and the lower pressure roller 7 can be controlled according to the paper web thickness and actual production needs. This can avoid the problem of insufficient dewatering caused by insufficient pressure, and also prevent the paper web from being crushed due to excessive pressure, effectively ensuring the stability of the pressing process and the paper quality.

[0029] As a technical optimization of this utility model, a flat plate 20 is fixedly connected to one side of each of the two upright plates 1 facing away from each other, and a guide block 16 is fixedly connected to one side of each of the two arc-shaped fixed plates 13 facing away from each other. A slide rod 17 is fixedly connected to the upper end of the flat plate 20, passing through the guide block 16 and slidingly connected to the guide block 16.

[0030] In this embodiment: by setting two flat plates 20, the guide block 16 is fixed, and due to the sliding cooperation between the guide block 16 and the slide rod 17, the arc-shaped fixing plate 13, the two discs 12 and the counterweight plate 15 can be prevented from tilting as a whole.

[0031] As a technical optimization of this utility model, slide rails are installed on both the front and rear sides of the inner walls of the two rectangular grooves 4, and the support block 5 is slidably connected to the inside of the rectangular grooves 4 through the two slide rails.

[0032] In this embodiment: Since the support block 5 is slidably connected to the inside of the rectangular groove 4 by two slide rails, the two support blocks 5 can be prevented from tilting or moving horizontally.

[0033] As a technical optimization of this utility model, a connecting plate 21 is fixedly connected between the upper sides of the two opposing sides of the two upright plates 1, and a connecting block 18 is fixedly connected between the lower sides of the two opposing sides of the two upright plates 1. A conical groove is opened through the upper end of the connecting block 18, and a drainage frame 19 communicating with the conical groove is fixedly connected to the lower end of the connecting block 18.

[0034] In this embodiment, the squeezed water enters the conical groove at the upper end of the connecting block 18 and is then discharged through the drainage frame 19 at the lower end.

[0035] As a technical optimization of this utility model, both the upper pressure roller 3 and the lower pressure roller 7 are hollow structures.

[0036] In this embodiment: Since both the upper pressure roller 3 and the lower pressure roller 7 are hollow structures, the weight of the upper pressure roller 3 and the lower pressure roller 7 can be reduced. In particular, it is necessary to reduce the weight of the lower pressure roller 7 so that the lower pressure roller 7 can be lifted up through the counterweight effect.

[0037] As a technical optimization of this utility model, the distance between the upper end of the limiting rod 14 and the lower end of the upper disk 12 is greater than the thickness of the counterweight disk 15.

[0038] In this embodiment: Since the distance between the upper end of the limiting rod 14 and the lower end of the upper disk 12 is greater than the thickness of the counterweight disk 15, it is convenient to pick up and put down the counterweight disk 15 when increasing or decreasing the number of counterweight disks 15.

[0039] As a technical optimization of this utility model, the lower ends of both flat plates 20 are fixedly connected to a mounting bracket with multiple mounting holes.

[0040] In this embodiment: by providing a mounting bracket with multiple mounting holes, the device can be mounted on the frame using fasteners.

[0041] The working principle and usage process of this utility model: The two support wheels 9 inside the U-shaped frame 8 serve as the turning fulcrum of the wire rope 11. The arc-shaped fixing plate 13 connects the upper and lower discs 12, thereby bearing the weight of the counterweight disc 15. Since the support wheels 9 are rotatably connected to the U-shaped frame 8, the friction force when the wire rope 11 is pulled can be reduced.

[0042] During the conveying of the wet paper web with the blanket or mesh belt, it will come into contact with the lower side of the outer wall of the upper pressure roller 3. The weight of the counterweight plate 15 is transmitted to the steel wire rope 11 through the upper disc 12. The weights of the left and right counterweight plates 15 are equal. After the steel wire rope 11 is turned by the support wheel 9, it pulls the connecting ear plate 10 upward, thereby providing an upward pulling force to the support block 5. The second rotating shaft 6 causes the lower pressure roller 7 to come into close contact with the paper web, forming the pressing force required for pressing with the upper pressure roller 3. During the conveying process, the friction will cause the upper pressure roller 3 to rotate with the two first rotating shafts 2, and at the same time cause the lower pressure roller 7 to rotate with the two second rotating shafts 6, thereby reducing the friction of the paper web conveying and pressing the moisture of the wet paper web. The pressed moisture will enter the conical groove at the upper end of the connecting block 18 and then be discharged through the drainage frame 19 at the lower end. In this way, it can automatically adapt to the pressing requirements of paper webs of different thicknesses, significantly improving the process flexibility and production adaptability of the device.

[0043] Depending on the paper web thickness and dewatering requirements, pressure can be adjusted by increasing or decreasing the number of counterweights 15 on the limit rod 14 or by replacing them with counterweights 15 of different weights. To increase the clamping force, increase the number of counterweights 15 or replace them with heavier counterweights 15 to prevent insufficient squeezing pressure. The limit rod 14 also limits the counterweights 15, preventing them from slipping and improving safety. To decrease the clamping force, reduce the number of counterweights 15 or replace them with lighter counterweights 15 to avoid paper web crushing due to excessive pressure. When removing the counterweight plate 15, simply lift the upper counterweight plate 15 upwards to disengage it from the limiting rod 14. If it is necessary to increase the number of counterweight plates 15, simply place the counterweight plates 15 onto the outer wall of the limiting rod 14. During this process, it is necessary to ensure that the weight of the counterweight plates 15 on both sides is equal. In this way, the pressing force between the upper pressure roller 3 and the lower pressure roller 7 can be controlled according to the paper web thickness and actual production needs. This can avoid the problem of insufficient dewatering caused by insufficient pressure, and also prevent the paper web from being crushed due to excessive pressure, effectively ensuring the stability of the pressing process and the paper quality.

[0044] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A paper machine pressing and dewatering device, comprising two vertical plates (1) distributed left and right, characterized in that: Each of the two upright plates (1) is rotatably connected to a first rotating shaft (2) via an embedded bearing on one side. An upper pressure roller (3) is fixedly connected between the two first rotating shafts (2). A rectangular groove (4) is opened through each of the two upright plates (1) on one side. A support block (5) is provided inside each of the two rectangular grooves (4). A second rotating shaft (6) is rotatably connected to each of the two support blocks (5) on one side via an embedded bearing on one side. A lower pressure roller (7) is fixedly connected between the two second rotating shafts (6). A pressure application mechanism is provided on the opposite side of each of the two upright plates (1). The pressure-applying mechanism includes a U-shaped frame (8) fixedly connected to the outer wall of the upright plate (1). The U-shaped frame (8) has two left and right supporting wheels (9) rotatably connected inside. The outer wall of the support block (5) is fixedly connected to a connecting ear plate (10). The upper end of the connecting ear plate (10) is fixedly connected to a steel wire rope (11) that abuts against the two supporting wheels (9). Two discs (12) are arranged below the U-shaped frame (8). An arc-shaped fixing plate (13) is fixedly connected between the outer walls of the two discs (12). The other end of the steel wire rope (11) is fixedly connected to the upper disc (12). The upper end of the lower disc (12) is fixedly connected to a limiting rod (14). Multiple counterweight discs (15) are arranged between the two discs (12) and sleeved on the outside of the limiting rod (14).

2. The paper machine press dewatering device according to claim 1, characterized in that: Each of the two upright plates (1) is fixedly connected to a flat plate (20) on the opposite side, and each of the two arc-shaped fixed plates (13) is fixedly connected to a guide block (16) on the opposite side. The upper end of the flat plate (20) is fixedly connected to a slide rod (17) that passes through the guide block (16) and is slidably connected to the guide block (16).

3. The paper machine press dewatering device according to claim 1, characterized in that: The front and rear sides of the inner walls of the two rectangular grooves (4) are equipped with slide rails, and the support block (5) is slidably connected to the inside of the rectangular grooves (4) through the two slide rails.

4. The paper machine press dewatering device according to claim 1, characterized in that: A connecting plate (21) is fixedly connected between the upper sides of the two opposing sides of the two upright plates (1), and a connecting block (18) is fixedly connected between the lower sides of the two opposing sides of the two upright plates (1). A conical groove is opened through the upper end of the connecting block (18), and a drainage frame (19) communicating with the conical groove is fixedly connected to the lower end of the connecting block (18).

5. The paper machine press dewatering device according to claim 1, characterized in that: Both the upper pressure roller (3) and the lower pressure roller (7) are hollow structures.

6. The paper machine press dewatering device according to claim 1, characterized in that: The distance between the upper end of the limiting rod (14) and the lower end of the upper disk (12) is greater than the thickness of the counterweight disk (15).

7. A paper machine press dewatering device according to claim 2, characterized in that: The lower ends of both of the two flat plates (20) are fixedly connected to a mounting bracket with multiple mounting holes.

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