High efficiency cleaning mechanism for yancee gas hood bellows
By designing a highly efficient cleaning mechanism for the cover, brush, slide, toggle, and latch of the Yankee air hood bellows, the problem of production interruption caused by the need to stop the machine for cleaning in the prior art has been solved, achieving efficient cleaning without stopping the machine, and improving production continuity and paper web drying efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN HUADILAI MACHINERY CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-07-21
AI Technical Summary
The existing cleaning method for Yankee air hoods requires manual cleaning after machine shutdown, which affects production continuity and takes a long time. This can lead to nozzle blockage, affecting paper web drying efficiency and quality.
Design a high-efficiency cleaning mechanism that includes a cover plate, brush plate, slide plate, lever plate and latch. The mechanism achieves automated cleaning without downtime through an articulated structure, removes blockages directly with high-temperature resistant bristles, and ensures efficient cleaning and production continuity by combining a simple locking and sliding guide structure.
It achieves efficient cleaning without downtime, significantly shortens cleaning time, improves production continuity, avoids damage caused by high temperatures, reduces maintenance costs, and ensures stable paper web drying efficiency and quality.
Smart Images
Figure CN224531342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of papermaking machinery technology, specifically to a high-efficiency cleaning mechanism for Yankee air hood bellows. Background Technology
[0002] In the paper industry, Yankee air hoods are core equipment in the drying section of the production process for tissue paper, specialty paper, and other paper types. They use nozzles inside the air hood to spray high-temperature, high-speed airflow onto the paper web for rapid drying. However, during long-term operation, fiber dust generated during paper web drying can easily adhere to the inner wall of the nozzles with the airflow, gradually causing blockages. This can lead to reduced airflow speed and drying efficiency, resulting in uneven moisture content in the paper web; in severe cases, it can cause complete blockage of the nozzles, forming localized "dry spots" or "wet spots," affecting paper quality and even requiring machine shutdown for maintenance.
[0003] The existing cleaning method for Yanke air hood bellows requires the machine to be stopped and the side cover of the air hood to be removed. Operators then use a brush or compressed air gun to clean each nozzle one by one. For wide bellows (such as 6-10m), a single cleaning takes 2-4 hours, which seriously affects the continuity of production. Therefore, there is an urgent need to design a Yankee air hood cleaning mechanism that is simple in structure, easy to operate, resistant to high temperatures, and capable of efficient cleaning, in order to solve the above problems.
[0004] Existing Yankee air hoods include, but are not limited to, a hood body and several bellows arranged in an arch shape on the hood body facing the Yankee cylinder for blowing air onto the paper. Utility Model Content
[0005] The main purpose of this invention is to provide a high-efficiency cleaning mechanism for Yankee air hood bellows, aiming to solve the technical problem that the method of cleaning the bellows during shutdown affects the continuity of production in the prior art.
[0006] To achieve the above objectives, this utility model proposes a high-efficiency cleaning mechanism for a Yankee hood bellows, comprising a Yankee hood body and a bellows fixedly mounted on the body. A strip-shaped through-hole is formed on the side of the bellows away from the body. A cover plate for closing the strip-shaped through-hole is connected to the through-hole via a hinged structure. Multiple air outlets for airflow are formed through the cover plate. A brush plate is provided on the side of the cover plate near the inside of the bellows. Sliding plates are symmetrically fixed at both ends of the brush plate, and the sliding plates are slidably connected to and slide with the cover plate. The direction is consistent with the length direction of the cover plate. Several bristles are fixed on the side of the brush plate near the cover plate, and the bristles are made of high temperature resistant material. A strip-shaped sliding hole is opened through the cover plate. The extension direction of the strip-shaped sliding hole is the same as the sliding direction of the slide plate. A lever is slidably arranged in the strip-shaped sliding hole. One end of the lever is fixedly connected to any slide plate. The other end of the lever extends to the side of the cover plate away from the inside of the air box. A latch is provided between the cover plate and the air box to lock the cover plate in the closed state.
[0007] Preferably, the hinge structure is a hinge or a hinge chain, one side of which is fixedly connected to the edge of the cover plate and the other side is fixedly connected to the edge of the strip-shaped through hole. The cover plate can achieve an opening and closing action of 0-90° around the rotation axis of the hinge structure.
[0008] Preferably, the high-temperature resistant material is high-temperature resistant nylon, ceramic fiber or stainless steel wire, the bristles are 5-15mm long, and several bristles are evenly distributed along the length of the brush plate, with a spacing of 1-3mm between adjacent bristles.
[0009] Preferably, a sliding guide rail is fixed along the length of the side of the cover plate near the inside of the air box, and a sliding groove adapted to the sliding guide rail is provided on the sliding plate. The cross-sectional shape of the sliding guide rail is T-shaped, dovetail-shaped or I-shaped to prevent the sliding plate from detaching in a direction perpendicular to the surface of the cover plate.
[0010] Preferably, the end of the lever extending outside the cover plate is provided with an anti-slip structure. The anti-slip structure is either raised textures arranged at intervals along the width direction of the lever or an anti-slip rubber sleeve fitted onto the end of the lever. The thickness of the anti-slip rubber sleeve is 1-3mm.
[0011] Preferably, a limiting block is fixedly provided at the end of the slide away from the brush plate. The limiting block and the slide are integrally formed or bolted together. When the slide slides to the limit position along the length of the cover plate, the limiting block abuts against the end of the cover plate to restrict the slide from continuing to slide.
[0012] Preferably, the latch includes a latch tongue fixed to the edge of the cover plate away from the hinge structure, and a lock seat fixed to the corresponding edge of the bellows strip through hole. The latch tongue is an elastic metal sheet, and the lock seat has a groove adapted to the latch tongue. When the cover plate is closed, the latch tongue elastically engages in the groove to lock. Pressing the latch tongue will disengage it from the groove and release the locking state.
[0013] Preferably, the air outlet is circular, elliptical, or rectangular, and several air outlets are arranged in an array along the length and width of the cover plate. The center distance between two adjacent air outlets is 5-20mm, and the diameter or maximum side length of the air outlet is 2-8mm.
[0014] Preferably, the brush plate is made of aluminum alloy or high-temperature resistant plastic, the length of the brush plate is adapted to the length of the cover plate, the width of the brush plate is 50-80mm, and the brush plate is fixedly connected to the slide plate by bolts or welding.
[0015] Preferably, the bellows and the cover are fixedly connected by bolts or by welding.
[0016] In the technical solution of this utility model, by moving the lever extending outward from the cover plate, the brush plate can be driven to slide along the length of the cover plate. The high-temperature resistant bristles on the brush plate can directly brush away the dust blocking the air outlet. The entire process does not require stopping the machine or removing any parts, which solves the drawback of the existing cleaning method of "stopping the machine and removing the cover" and avoids production interruption.
[0017] When a lot of dust accumulates inside the bellows, simply unlock the latch and open the cover plate around the hinged structure (without removing the side cover of the air hood) to directly pour out the residual dust inside the bellows. Compared with the existing method of "cleaning one by one with hand tools", this greatly shortens the cleaning time of wide bellows (no need for 2-4 hours) and significantly improves production continuity.
[0018] The entire mechanism consists of only simple components such as a cover plate, brush plate, slide plate, lever plate, and lock, requiring no complicated tools for operation; the bristles are made of high-temperature resistant materials, which can adapt to the high-temperature environment of the Yankee air hood drying section, avoiding damage to the cleaning components due to high temperatures and ensuring long-term stable use. Attached Figure Description
[0019] 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 the structures shown in these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bellows cover in the closed state of this utility model; Figure 3 This is a schematic diagram of the bellows cover plate in the open state of this utility model. Figure 4 For the present utility model Figure 2 A magnified schematic diagram of a portion of area A; Figure 5 For the present utility model Figure 3 A magnified schematic diagram of the structure of region B.
[0021] Explanation of icon numbers: 1. Cover; 2. Air box; 2a. Strip-shaped through hole; 3. Cover plate; 3a. Air outlet; 3b. Strip-shaped sliding hole; 4. Lock; 5. Toggle plate; 6. Brush plate; 7. Slide plate.
[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0023] 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.
[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0025] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0028] This invention proposes a high-efficiency cleaning mechanism for Yankee air hood bellows.
[0029] Please refer to Figures 1 to 5 The high-efficiency cleaning mechanism for the Yankee air hood bellows 2 includes a hood body 1 and a bellows 2 fixedly mounted on the hood body 1. A strip-shaped through-hole 2a is formed on the side of the bellows 2 away from the hood body 1. A cover plate 3 for closing the strip-shaped through-hole 2a is connected to the strip-shaped through-hole 2a via a hinged structure. Multiple air outlet holes 3a for airflow are formed through the cover plate 3. A brush plate 6 is provided on the side of the cover plate 3 near the interior of the bellows 2. Slide plates 7 are symmetrically fixed at both ends of the brush plate 6. The slide plates 7 are slidably connected to the cover plate 3, and the sliding direction is the same as that of the cover plate 3. The brush plate 6 has a consistent length direction. Several bristles are fixed on the side of the brush plate 6 near the cover plate 3, which are in contact with the surface of the cover plate 3. The bristles are made of high temperature resistant material. A strip-shaped sliding hole 3b is opened through the cover plate 3. The extension direction of the strip-shaped sliding hole 3b is the same as the sliding direction of the slide plate 7. A lever 5 is slidably arranged in the strip-shaped sliding hole 3b. One end of the lever 5 is fixedly connected to any slide plate 7. The other end of the lever 5 extends to the side of the cover plate 3 away from the inside of the air box 2. A latch 4 is provided between the cover plate 3 and the air box 2 to lock the cover plate 3 in the closed state.
[0030] In the technical solution of this utility model, by moving the lever 5 extending outward from the cover plate 3, the brush plate 6 can be driven to slide along the length direction of the cover plate 3. The high-temperature resistant bristles on the brush plate 6 can directly brush away the dust blocking the air outlet 3a. The whole process does not require stopping the machine or removing any parts, which solves the drawback of the existing cleaning method of "stopping the machine and removing the cover" and avoids production interruption.
[0031] When a lot of dust accumulates in the bellows 2, simply unlock the latch 4 and open the cover 3 around the hinge structure (without removing the side cover of the air hood) to directly pour out the residual dust in the bellows 2. Compared with the existing method of "cleaning one by one with hand tools", the cleaning time of the wide bellows 2 is greatly shortened (no need for 2-4 hours) and production continuity is significantly improved.
[0032] The entire mechanism consists of only simple components such as cover plate 3, brush plate 6, slide plate 7, lever plate 5, and lock 4, and no complicated tools are required for operation. The brush bristles are made of high temperature resistant materials, which can adapt to the high temperature environment of the Yankee air hood drying section, avoid damage to the cleaning components due to high temperature, and ensure long-term stable use.
[0033] Please refer to the appendix. Figure 2-5 The hinge structure is a hinge or hinge chain. One side of the hinge or hinge chain is fixedly connected to the edge of the cover plate 3, and the other side is fixedly connected to the edge of the strip-shaped through hole 2a. The cover plate 3 can achieve an opening and closing action of 0-90° around the rotation axis of the hinge structure.
[0034] The cover plate 3 can be opened and closed from 0 to 90° by means of a hinge. When closed, it can tightly seal the strip-shaped through hole 2a of the air box 2, ensuring that the high-temperature and high-speed airflow does not leak when the air hood is working normally (avoiding a decrease in drying efficiency). When opened to 90°, the cover plate 3 is fully unfolded without obstruction, which makes it convenient for operators to empty the dust in the air box 2 or to inspect the inside of the air box 2, thus solving the problem of "inconvenience in cleaning / maintenance caused by improper opening and closing angle of the cover plate 3".
[0035] The hinges are mature and universal components with low installation and maintenance costs. They are also firmly connected and can withstand the wear and tear of the cover plate 3 from long-term opening and closing, preventing the cover plate 3 from loosening and affecting the air cover's sealing performance. They balance "easy operation" and "reliable structure" and are suitable for long-term production needs.
[0036] Please refer to the appendix. Figure 2-5 The high-temperature resistant material is high-temperature resistant nylon, ceramic fiber or stainless steel wire, the bristles are 5-15mm long, and several bristles are evenly arranged along the length of the brush plate 6, with a spacing of 1-3mm between two adjacent bristles.
[0037] The bristles are made of high-temperature resistant nylon, ceramic fiber, or stainless steel wire, which can withstand the high-temperature airflow in the Yankee air hood drying section (avoiding the bristles from melting or deforming due to high temperature), solving the problem of ordinary bristles being easily damaged and needing frequent replacement, and reducing maintenance costs.
[0038] The bristles are 5-15mm long, allowing them to reach deep into the air outlet 3a to contact the dust (avoiding the inability to remove blockages due to short bristles); the spacing between adjacent bristles is 1-3mm, ensuring that the bristle density is sufficient to cover the air outlet 3a while avoiding excessive spacing that could cause slippage and jamming, thus achieving "efficient dust removal and thorough cleaning," solving the problem of "clogging leading to reduced airflow and low drying efficiency" in the background technology.
[0039] Please refer to the appendix. Figure 2-5 The cover plate 3 is fixed with a sliding guide rail along its length on the side near the inside of the air box 2. The slide plate 7 is provided with a sliding groove that matches the sliding guide rail. The cross-sectional shape of the sliding guide rail is T-shaped, dovetail-shaped or I-shaped to prevent the slide plate 7 from detaching in a direction perpendicular to the surface of the cover plate 3.
[0040] The sliding guide rail adopts a T-shaped, dovetail-shaped, or I-shaped cross section, which is precisely matched with the sliding groove of the slide plate 7. It can effectively limit the slide plate 7 from detaching in a direction perpendicular to the surface of the cover plate 3, and prevent the slide plate 7 from falling off during the cleaning process, thus solving the problem of "sliding structure failure affecting cleaning operation".
[0041] Smooth sliding enhances cleaning convenience: The matching structure of the guide rail and groove reduces sliding friction, ensuring that the brush plate 6 slides smoothly along the length of the cover plate 3. Operators do not need to exert effort to move the dial plate 5, further optimizing the "easy to operate" feature and adapting to long-term, high-frequency cleaning needs.
[0042] Please refer to the appendix. Figure 2-5 The end of the lever 5 extending outward from the cover plate 3 is provided with an anti-slip structure. The anti-slip structure is either a raised pattern arranged at intervals along the width direction of the lever 5 or an anti-slip rubber sleeve fitted on the end of the lever 5. The thickness of the anti-slip rubber sleeve is 1-3mm.
[0043] The raised texture or anti-slip rubber sleeve (1-3mm thick) at the end of the lever 5 can increase the friction between the hand and the lever 5. Even if the operator is wearing gloves or has dust on their hands, the lever 5 can be moved stably, avoiding slippage that could lead to operational errors or hand injuries. This solves the problem of "insufficient friction and inconvenience during cleaning operations".
[0044] The anti-slip rubber sleeve is made of soft, low-cost material and can be quickly replaced after long-term wear, eliminating the need to replace the entire lever 5, reducing maintenance costs and ensuring long-term convenience.
[0045] Please refer to the appendix. Figure 2-5 A limiting block is fixed at the end of the slide plate 7 away from the brush plate 6. The limiting block and the slide plate 7 are integrally formed or bolted together. When the slide plate 7 slides to the limit position along the length of the cover plate 3, the limiting block abuts against the end of the cover plate 3 to restrict the slide plate 7 from continuing to slide.
[0046] The limiting block can abut against the end of the cover plate 3 when the slide plate 7 slides to the limit position, preventing the slide plate 7 from sliding excessively and causing the brush plate 6 to collide with the air box 2 or the edge of the cover plate 3 (causing component deformation or damage), thus extending the service life of the brush plate 6 and the slide plate 7 and reducing maintenance costs.
[0047] By controlling the sliding range of the brush plate 6 with the limiting block, it is ensured that the brush plate 6 can cover all the air outlets 3a on the cover plate 3 (without cleaning dead corners), avoiding some air outlets 3a not being cleaned and residual blockages due to insufficient sliding range, further ensuring "efficient cleaning", and solving the problem of "uneven moisture content in paper web caused by blockage" in the background technology.
[0048] Please refer to the appendix. Figure 2-5 The latch 4 includes a latch fixed to the edge of the cover plate 3 away from the hinge structure, and a lock seat fixed to the corresponding edge of the strip-shaped through hole 2a of the bellows 2. The latch is an elastic metal sheet, and the lock seat has a groove that matches the latch. When the cover plate 3 is closed, the latch elastically engages in the groove to lock. Pressing the latch will disengage it from the groove and release the locking state.
[0049] When the cover plate 3 is closed, the elastic metal sheet locking tongue can be tightly engaged in the lock seat groove, ensuring that the strip-shaped through hole 2a of the air box 2 is completely closed, preventing high-temperature and high-speed airflow from leaking from the gap of the cover plate 3 (preventing the wind speed from decreasing and the drying efficiency from decreasing), thus solving the problem of "low drying efficiency" in the background technology.
[0050] Quick unlocking simplifies major cleaning operations: When unlocking, simply press the latch to disengage from the slot, eliminating the need for complex tools such as wrenches. Operators can quickly open the cover 3 to dump dust, further shortening the time required for major cleaning, improving production continuity, and solving the problem of "cumbersome cover removal" in existing cleaning processes.
[0051] Please refer to the appendix. Figure 4-5 The air outlet 3a is circular, elliptical or rectangular. Several air outlets 3a are arranged in an array along the length and width of the cover plate 3. The center distance between two adjacent air outlets 3a is 5-20mm. The diameter or maximum side length of the air outlet 3a is 2-8mm.
[0052] The air outlets 3a are arranged in an array along the length / width direction of the cover plate 3, with an adjacent center spacing of 5-20mm. This ensures that the high-temperature, high-speed airflow is evenly sprayed onto the paper web, avoiding uneven moisture distribution in the paper web caused by local wind speed differences, reducing the generation of dry spots / wet spots, and solving the problem of "paper quality being affected" in the background technology.
[0053] The air outlet has a diameter of 3a and a maximum side length of 2-8mm, which ensures sufficient ventilation (without affecting drying efficiency) and allows the high-temperature resistant bristles to easily reach into the hole to remove dust (avoiding the problem of bristles not being able to clean due to the small hole diameter, which would exacerbate clogging). This design reduces the risk of clogging from the source and reduces the frequency of cleaning.
[0054] Please refer to the appendix. Figure 2-5 The brush plate 6 is made of aluminum alloy or high-temperature resistant plastic. The length of the brush plate 6 is adapted to the length of the cover plate 3. The width of the brush plate 6 is 50-80mm. The brush plate 6 and the slide plate 7 are fixedly connected by bolts or welding.
[0055] The brush plate 6 is made of aluminum alloy or high-temperature resistant plastic, which can withstand the high temperature environment of the air hood (to avoid deformation and damage); the slide plate 7 is fixed by bolt connection or welding. Bolt connection facilitates the maintenance and replacement of brush plate 6 in the later stage, while welding ensures the structural firmness and prevents the brush plate 6 from detaching from the slide plate 7 due to long-term sliding, thus solving the problem of "cleaning parts are easily damaged and inconvenient to maintain".
[0056] Comprehensive cleaning coverage and improved efficiency: The length of the brush plate 6 is adapted to the cover plate 3 and the width is 50-80mm. This ensures that the brush plate 6 covers all air outlets 3a when it slides (without cleaning dead corners), while also preventing the brush plate 6 from being too wide and causing it to jam. This ensures that multiple air outlets 3a can be cleaned with a single slide, improving small cleaning efficiency and reducing the workload of operators.
[0057] Please refer to the appendix. Figure 1 The bellows 2 and the cover 1 are fixedly connected by bolts or by welding.
[0058] Welded connections ensure the sturdiness of the air box 2 and the cover 1, preventing the air box 2 from loosening and causing airflow leakage during long-term operation of the air cover (ensuring drying efficiency); bolted connections facilitate the disassembly and maintenance of the air box 2 in the future (such as internal inspection and component replacement), without the need to completely remove the air cover, reducing maintenance downtime and solving the problem of "cumbersome maintenance of the air box 2 and impact on production".
[0059] The connection method can be selected according to the actual working conditions of the production line (such as welding for long-term stable operation and bolts for frequent maintenance), which improves the versatility and practicality of the mechanism and reduces the adaptation cost for enterprises.
[0060] The specific operation method of this utility model is as follows: Before operation, determine the scenario: if the air outlet 3a is slightly blocked (wind speed decreases, paper web moisture fluctuates), select small cleaning (no shutdown); if the air box 2 has a lot of dust accumulation (regularly every 1-2 weeks or inefficient airflow), select large cleaning (short shutdown). At the same time, check the functions of components such as dial 5 and latch 4.
[0061] Routine cleaning can be performed without stopping the machine: The operator wears high-temperature resistant gloves, holds the non-slip end of the dial plate 5, and slides it back and forth 2-3 times along the length of the cover plate 3. The brush plate 6 drives the high-temperature resistant bristles to penetrate the air outlet 3a to clean the dust. The limit block prevents excessive sliding. After completion, the dial plate 5 is reset, and the air spray is quickly restored to uniformity.
[0062] Regular deep cleaning only takes 5-10 minutes: First, stop the paper web conveying and turn off the high-temperature airflow. Press the locking tongue to unlock the cover plate 3, rotate it 60-90° and then tilt the dust box 2 to clean the corners (you can use a low-pressure air gun to clean the corners). Then close the cover and let the locking tongue lock automatically. There is no need to remove the side cover of the air hood, and production can be quickly resumed.
[0063] Check the brush bristles for damage, the guide rail for dust, and the screws on the locking mechanism and hinge structure. Tighten any loose fasteners promptly, and replace any damaged parts. During operation, pay attention to safety precautions and apply force evenly. This system effectively solves the problems of long downtime and cumbersome operation associated with traditional cleaning methods.
[0064] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.
Claims
1. A high-efficiency cleaning mechanism for a Yankee air hood bellows, characterized in that, The device includes a hood for a Yankee air hood and a bellows fixedly mounted on the hood. A strip-shaped through-hole is formed on the side of the bellows facing away from the hood. A cover plate for closing the strip-shaped through-hole is connected to the through-hole via a hinged structure. Multiple air outlets for airflow are formed through the cover plate. A brush plate is provided on the side of the cover plate near the inside of the bellows. Sliding plates are symmetrically fixed at both ends of the brush plate. The sliding plates are slidably connected to the cover plate, and their sliding direction is consistent with the length direction of the cover plate. Several bristles made of high-temperature resistant material are fixed to the side of the brush plate near the cover plate, contacting the surface of the cover plate. A strip-shaped sliding hole is formed through the cover plate, extending in the same direction as the sliding plate. A lever is slidably mounted within the strip-shaped sliding hole. One end of the lever is fixedly connected to any one of the sliding plates, and the other end extends to the side of the cover plate facing away from the inside of the bellows. A latch is provided between the cover plate and the bellows to lock the cover plate in a closed state.
2. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The hinge structure is a hinge or hinge chain. One side of the hinge or hinge chain is fixedly connected to the edge of the cover plate, and the other side is fixedly connected to the edge of the strip-shaped through hole. The cover plate can achieve an opening and closing action of 0-90° around the rotation axis of the hinge structure.
3. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The high-temperature resistant material is high-temperature resistant nylon, ceramic fiber or stainless steel wire, the bristles are 5-15mm long, and several bristles are evenly arranged along the length of the brush plate, with a spacing of 1-3mm between two adjacent bristles.
4. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, A sliding guide rail is fixed along the length of the side of the cover plate near the inside of the air box. A sliding groove adapted to the sliding guide rail is provided on the sliding plate. The cross-sectional shape of the sliding guide rail is T-shaped, dovetail-shaped or I-shaped to prevent the sliding plate from detaching in a direction perpendicular to the surface of the cover plate.
5. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The end of the lever extending outward from the cover plate is provided with an anti-slip structure. The anti-slip structure is either a raised pattern arranged at intervals along the width direction of the lever or an anti-slip rubber sleeve fitted onto the end of the lever. The thickness of the anti-slip rubber sleeve is 1-3mm.
6. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, A limiting block is fixed at the end of the slide away from the brush plate. The limiting block and the slide are integrally formed or bolted together. When the slide slides to the limit position along the length of the cover plate, the limiting block abuts against the end of the cover plate to restrict the slide from continuing to slide.
7. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The latch includes a latch fixed to the edge of the cover plate away from the hinge structure, and a lock seat fixed to the corresponding edge of the bellows strip through hole. The latch is a flexible metal sheet, and the lock seat has a groove that matches the latch. When the cover plate is closed, the latch elastically engages with the groove to lock. Pressing the latch will disengage it from the groove and release the lock.
8. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The air outlet is circular, elliptical, or rectangular. Several air outlets are arranged in an array along the length and width of the cover plate. The center distance between two adjacent air outlets is 5-20mm, and the diameter or maximum side length of the air outlet is 2-8mm.
9. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The brush plate is made of aluminum alloy or high-temperature resistant plastic. The length of the brush plate is adapted to the length of the cover plate. The width of the brush plate is 50-80mm. The brush plate is fixedly connected to the slide plate by bolts or welding.
10. The high-efficiency cleaning mechanism for the Yankee air hood bellows according to claim 1, characterized in that, The bellows and the cover are fixedly connected by bolts or by welding.