Alloy cast iron drying cylinder for papermaking production

Abstract

The utility model discloses an alloy cast iron drying cylinder for papermaking production, which relates to the technical field of alloy cast iron drying cylinders, and comprises a drying cylinder body, a rotary joint is connected outside the drying cylinder body, a steam pipe is communicated inside the rotary joint, a support is arranged outside the drying cylinder body, a fixed shaft is fixedly mounted inside the support, and the steam pipe is communicated with the steam pipe. A connecting plate is fixedly mounted on the outer surface of the fixing shaft, through cooperation of a spring, a control plate and a scraper blade, the scraper blade can be pushed to be tightly attached to the inner wall of the drying cylinder body under the action of the spring, the stability of contact between the scraper blade and the inner wall of the drying cylinder body is improved, the position of one end of the spring can be adjusted through movement of the control plate, and the stability of the drying cylinder body is improved. The pushing force applied to the scraping plate by the spring can be adjusted, various using pressure requirements of the scraping plate are met, the function that the scraping plate in the drying cylinder body is dynamically attached to the inner wall is achieved, and the stability when a condensate water film is removed is improved.

Description

Technical Field

[0001] This utility model relates to the field of alloy cast iron drying cylinder technology, specifically to an alloy cast iron drying cylinder used in papermaking production. Background Technology

[0002] Alloy cast iron drying cylinders are a type of drying device, mainly used in papermaking for drying paper. They have a hollow internal structure, and steam is introduced into the hollow cylinder through an external steam pipe during operation. The paper is dried as it moves outside the drying cylinder.

[0003] Steam heats the drying cylinder and condenses into condensate. The condensate flows to the lower part of the cylinder. A siphon pipe is installed inside the cylinder to drain the condensate. When the condensate comes into contact with the inner wall of the cylinder, it forms a condensate film. This film affects heat transfer efficiency. Therefore, existing technologies use fixed scrapers inside the cylinder to remove the condensate film. The contact between the scraper and the inner wall breaks down the film. However, this fixed scraper structure does not allow for pressure adjustment. The scraper wears down with prolonged use, and the inner wall of the cylinder may have slight ellipticity during manufacturing. In such cases, the fixed-pressure scraper may not provide sufficient pressure, leading to condensate residue.

[0004] To address these issues, we offer alloy cast iron drying cylinders for paper production. Utility Model Content

[0005] 1) Technical problems to be solved

[0006] This invention proposes an alloy cast iron drying cylinder for papermaking production. Through the cooperation between the spring, control plate, and scraper, it solves the problem that the fixed scraper structure cannot adjust the scraper pressure.

[0007] (ii) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an alloy cast iron drying cylinder for papermaking production, comprising a drying cylinder body, wherein a rotary joint is externally connected to the drying cylinder body, and a steam pipe is internally connected to the rotary joint;

[0009] The drying cylinder body is provided with a support inside, and a fixed shaft is rotatably connected inside the support. A connecting plate is fixedly installed on the outer surface of the fixed shaft. A fixed ring is detachably connected to the outside of the connecting plate. A fixed rod is slidably connected inside the fixed ring. A movable rod is slidably connected inside the fixed rod. A scraper is fixedly installed at one end of the movable rod.

[0010] A spring is mounted on the outside of the moving rod, and a control plate is fixedly mounted on one end of the spring.

[0011] Furthermore, a fixed cylinder is fixedly installed on the outer surface of the control panel, the outer surface of the moving rod is slidably connected to the inner wall of the fixed cylinder, and the spring is disposed inside the fixed cylinder.

[0012] Furthermore, a U-shaped plate is fixedly installed on the outer surface of the connecting plate, and a positioning plate is detachably connected to the inside of the control plate, with the outer surface of the positioning plate slidingly connected to the inside of the U-shaped plate.

[0013] Furthermore, a double-ended screw is rotatably connected inside the fixed shaft, and a movable ring is threadedly connected to the outer surface of the double-ended screw and arranged symmetrically. The outer surface of the movable ring is slidably connected to the inside of the fixed shaft.

[0014] Furthermore, a connecting block one is fixedly installed on the outer surface of the moving ring, a support rod is hinged inside the connecting block one, and a connecting block two is hinged to the other end of the support rod. The outer surface of the connecting block two is fixedly installed with the outer surface of the control board.

[0015] Furthermore, the outer surface of the scraper is slidably connected to the inner wall of the drying cylinder body, and a maintenance pipe is connected inside the steam pipe.

[0016] (iii) Beneficial effects:

[0017] Compared with existing technologies, this alloy cast iron drying cylinder for papermaking production has the following advantages:

[0018] I. This alloy cast iron drying cylinder for papermaking production, through the cooperation of springs, control plates, and scrapers, allows the drying cylinder body to rotate during operation. At this time, the scraper will contact the inner wall of the drying cylinder body. The relative rotation of the drying cylinder body and the scraper can remove the condensate film. Under the action of the spring, the scraper can be pushed to fit tightly against the inner wall of the drying cylinder body, improving the stability of the contact between the scraper and the inner wall of the drying cylinder body. The position of one end of the spring can be adjusted by moving the control plate, which can adjust the thrust applied by the spring to the scraper to meet the various pressure requirements of the scraper. This realizes the function of dynamic contact between the scraper and the inner wall of the drying cylinder body, which is beneficial to improving the stability of condensate film removal.

[0019] II. This alloy cast iron drying cylinder for papermaking production, by setting up components such as a U-shaped plate and a double-headed screw, can provide auxiliary limit to the control plate through the connection of the U-shaped plate and the positioning plate, preventing the control plate from shifting to both sides and increasing the stability of the control plate during operation. The rotation of the double-headed screw can control the movement of connecting block one. At this time, connecting block one can push the control plate to move through connecting block two and the support rod. The compression of the two ends of the spring can be controlled by adjusting the distance between the control plate and the fixed rod, which facilitates the rapid adjustment of the spring force on the scraper. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a structural diagram of the present utility model;

[0022] Figure 2 This is a diagram showing the overall internal structure of this utility model;

[0023] Figure 3 This is a structural diagram of the fixed shaft component of this utility model;

[0024] Figure 4 This is a structural diagram of the control board component of this utility model;

[0025] Figure 5 This utility model Figure 4 A magnified view of a portion of the image.

[0026] In the diagram: 1. Drying cylinder body; 2. Rotary joint; 3. Steam pipe; 4. Support; 5. Fixed shaft; 6. Connecting plate; 7. Fixed ring; 8. Fixed rod; 9. Moving rod; 10. Scraper; 11. Spring; 12. Control panel; 13. Fixed cylinder; 14. U-shaped plate; 15. Positioning plate; 16. Double-ended screw; 17. Moving ring; 18. Connecting block one; 19. Support rod; 20. Connecting block two; 21. Maintenance pipe. Detailed Implementation

[0027] 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.

[0028] like Figure 1 - Figure 5 As shown, this utility model provides a technical solution: an alloy cast iron drying cylinder for papermaking production, including a drying cylinder body 1, a rotary joint 2 connected to the outside of the drying cylinder body 1, a steam pipe 3 connected inside the rotary joint 2, the two sides of the drying cylinder body 1 are sealed by fixed end caps and bolts, a through hole is opened inside the fixed end cap, the through hole can assist the fixed shaft 5 to pass through and the steam to pass through, a siphon pipe can also be installed on one side of the fixed end cap, the condensate formed can be discharged through the siphon pipe, when the paper is dried, the steam heats the inner wall inside the drying cylinder body 1, at this time the paper slides outside the drying cylinder body 1, the high heat of the drying cylinder body 1 can be used to dry the paper.

[0029] The drying cylinder body 1 has a support 4 inside, and a fixed shaft 5 is rotatably connected inside the support 4. The steam pipe 3 is connected to a maintenance pipe 21. The maintenance pipe 21 mainly includes a threaded sealing head and a support seat. The support seat is installed inside the maintenance pipe 21. One end of the fixed shaft 5 is welded and fixed through the support seat. The support seat has a through groove to facilitate the entry of steam. The support 4 is fixedly installed on one side inside the drying cylinder body 1. Sealing components such as sealing plates are installed at the contact positions of the fixed shaft 5 and the fixed end cover. The drying cylinder body 1 and the fixed shaft 5 can rotate relative to each other, while the fixed shaft 5 is fixed.

[0030] A connecting plate 6 is fixedly installed on the outer surface of the fixed shaft 5. A fixing ring 7 is detachably connected to the outside of the connecting plate 6. A fixing rod 8 is slidably connected inside the fixing ring 7. The fixing ring 7 is installed on the outside of the connecting plate 6 by multiple sets of fixing bolts. The fixing rod 8 can be removed and fixed by the detachable fixing ring 7. The modular design of the fixing ring 7 facilitates the removal and maintenance of the fixing rod 8.

[0031] A U-shaped plate 14 is fixedly installed on the outer surface of the connecting plate 6. A positioning plate 15 is detachably connected to the inside of the control plate 12. The outer surface of the positioning plate 15 is slidably connected to the inside of the U-shaped plate 14. The positioning plate 15 is installed inside the control plate 12 by fixing bolts. The contact between the positioning plate 15 and the U-shaped plate 14 can limit the control plate 12. At this time, the control plate 12 is limited by the U-shaped plate 14 and cannot sway left and right. It can only move vertically, which increases the stability of the control plate 12 when supported.

[0032] A movable rod 9 is slidably connected inside the fixed rod 8. A scraper 10 is fixedly installed at one end of the movable rod 9. The outer surface of the scraper 10 is slidably connected to the inner wall of the drying cylinder body 1. The scraper 10 will contact the inner wall of the drying cylinder body 1. At this time, when the drying cylinder body 1 rotates, the scraper 10 can scrape off the condensate film formed on the inner wall.

[0033] A spring 11 is installed on the outside of the moving rod 9. A control plate 12 is fixedly installed on one end of the spring 11. A fixed cylinder 13 is fixedly installed on the outer surface of the control plate 12. The outer surface of the moving rod 9 is slidably connected to the inner wall of the fixed cylinder 13. The spring 11 is located inside the fixed cylinder 13. The contact between the fixed cylinder 13 and the moving rod 9 can provide a sealing and protection function for the spring 11. Both the spring 11 and the aforementioned fixing bolt are coated with a coating, which enables the spring 11 and the fixing bolt to have good working stability in a humid environment. The spring 11 can push the moving rod 9 to move. At this time, the scraper 10 can be tightly attached to the inner wall of the drying cylinder body 1 and can conform to the shape of the drying cylinder. In order to ensure the working stability of the spring 11 in a high-temperature environment, the spring 11 can be a high-temperature alloy spring 11 and the surface treatment of the outer ceramic coating can be applied, which improves the stability of the spring 11 when used in a high-temperature environment.

[0034] A double-ended screw 16 is rotatably connected inside the fixed shaft 5. A movable ring 17 is threadedly connected to the outer surface of the double-ended screw 16 and arranged symmetrically. The outer surface of the movable ring 17 is slidably connected to the inside of the fixed shaft 5. One end of the double-ended screw 16 protrudes outside the fixed shaft 5. A reverse thread is provided on the outside of the double-ended screw 16. When controlling the rotation of the double-ended screw 16, a tool can be used to clamp one end of the double-ended screw 16 to rotate. The outside of the double-ended screw 16 should be coated with an anti-corrosion coating or other surface treatments to increase the stability of the double-ended screw 16 during operation.

[0035] A connecting block 18 is fixedly installed on the outer surface of the moving ring 17. A support rod 19 is hinged inside the connecting block 18. A connecting block 20 is hinged to the other end of the support rod 19. The outer surface of the connecting block 20 is fixedly installed on the outer surface of the control plate 12. When the double-headed screw 16 rotates, it can adjust the position of the connecting block 18. At this time, the connecting block 18 can control one end of the support rod 19 and support the movement of the connecting block 20. The connecting block 20 can push the control plate 12 to move and push one end of the spring 11 to move. At this time, the distance between the control plate 12 and the fixed rod 8 changes, and the compression of the spring 11 changes. The pressure on the scraper 10 can be adjusted according to the rotation speed of the drying cylinder body 1.

[0036] Working principle: When working, one end of the double-headed screw 16 is rotated. At this time, the double-headed screw 16 can control the movement of the connecting block 18. The movement of the connecting block 18 can adjust one end of the support rod 19 and support the movement of the connecting block 20, which can adjust the movement of the control plate 12. At this time, the distance between the control plate 12 and the fixed rod 8 changes, the compression at both ends of the spring 11 changes, the thrust of the spring 11 on the moving rod 9 changes, and the pressure between the scraper 10 and the inner wall of the drying cylinder body 1 changes. When the drying cylinder body 1 rotates under the action of the external rotary joint 2, the scraper 10 can scrape off the condensate film.

[0037] 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.

[0038] 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. An alloy cast iron drying cylinder for papermaking production, comprising a drying cylinder body (1), characterized in that: The drying cylinder body (1) is externally connected to a rotary joint (2), and the rotary joint (2) is internally connected to a steam pipe (3); The drying cylinder body (1) is provided with a support (4) inside. A fixed shaft (5) is rotatably connected inside the support (4). A connecting plate (6) is fixedly installed on the outer surface of the fixed shaft (5). A fixed ring (7) is detachably connected to the outside of the connecting plate (6). A fixed rod (8) is slidably connected inside the fixed ring (7). A moving rod (9) is slidably connected inside the fixed rod (8). A scraper (10) is fixedly installed at one end of the moving rod (9). A spring (11) is installed on the outside of the moving rod (9), and a control plate (12) is fixedly installed on one end of the spring (11).

2. The alloy cast iron drying cylinder for papermaking production according to claim 1, characterized in that: A fixed cylinder (13) is fixedly installed on the outer surface of the control panel (12), the outer surface of the moving rod (9) is slidably connected to the inner wall of the fixed cylinder (13), and the spring (11) is set inside the fixed cylinder (13).

3. The alloy cast iron drying cylinder for papermaking production according to claim 1, characterized in that: A U-shaped plate (14) is fixedly installed on the outer surface of the connecting plate (6), and a positioning plate (15) is detachably connected inside the control plate (12). The outer surface of the positioning plate (15) is slidably connected to the inside of the U-shaped plate (14).

4. The alloy cast iron drying cylinder for papermaking production according to claim 1, characterized in that: The fixed shaft (5) is internally rotatably connected to a double-ended screw (16), and the outer surface of the double-ended screw (16) is threadedly connected to a movable ring (17) and arranged symmetrically. The outer surface of the movable ring (17) is slidably connected to the inside of the fixed shaft (5).

5. The alloy cast iron drying cylinder for papermaking production according to claim 4, characterized in that: A connecting block one (18) is fixedly installed on the outer surface of the moving ring (17). A support rod (19) is hinged inside the connecting block one (18). A connecting block two (20) is hinged at the other end of the support rod (19). The outer surface of the connecting block two (20) is fixedly installed on the outer surface of the control plate (12).

6. The alloy cast iron drying cylinder for papermaking production according to claim 1, characterized in that: The outer surface of the scraper (10) is slidably connected to the inner wall of the drying cylinder body (1), and the steam pipe (3) is connected to the inside of the maintenance pipe (21).

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