A stirring device for a vertical continuous cooker

Abstract

This utility model discloses a stirring device for a vertical continuous cooker, installed inside the cooker, including: a scraping mechanism, a transmission mechanism, and a drive mechanism; the scraping mechanism includes a connecting sleeve, a guide seat at the top of the connecting sleeve, and several scraping arms at the bottom of the guide seat, one end of each scraping arm extending to the inner side of the top of the cooker's outlet flange; a guide plate is provided at the bottom of the scraping arms and along the outer periphery of the connecting sleeve, and a material-pulling claw is provided at the bottom of the connecting sleeve; the transmission mechanism includes an output shaft, the scraping mechanism being connected to one end of the output shaft of the transmission mechanism via the connecting sleeve, and the other end of the output shaft being connected to the drive mechanism. This device can prevent the slurry from depositing at the bottom of the cooker, forming clumps that tightly adhere to the bottom surface, allowing it to be dispersed and discharged from the cooker through the normal flow of slurry, reducing slurry accumulation at the outlet and preventing blockage.

Description

Technical Field

[0001] This utility model belongs to the technical field of mixing equipment, specifically a mixing device for a vertical continuous cooker. Background Technology

[0002] A continuous digester is a continuous production line used in the pulp and paper industry for chemical pulping. Its structure is a large, vertical, cylindrical pressure vessel. Under high temperature and pressure, wood chips and cooking liquor react within the vessel to produce pulp. During the cooking process, the pulp contains a large amount of fiber, hemicellulose, lignin, and other components. These components intertwine, giving the pulp a certain degree of viscosity and agglomeration. As cooking progresses, the pulp's fluidity gradually decreases due to changes in parameters such as temperature and pressure. Under these conditions, fibers and impurities in the pulp are more likely to deposit at the bottom, adhering and accumulating to form large clumps. These deposited pulp clumps, due to their significant weight and strong viscosity, adhere tightly to the bottom surface of the digester, making them difficult to remove with the normal pulp flow. This not only affects the digester's operating efficiency but also causes blockages in the bottom pipes, increasing the difficulty and cost of equipment maintenance.

[0003] Chinese patent CN223150919U discloses a cellulose digester for papermaking, including a digester with a feed inlet at the top and a discharge outlet at the bottom. The digester contains a filter screen and a stirring rod, as well as two cleaning mechanisms mounted on the stirring rod. A lifting assembly is located at the top of the stirring rod, and the cleaning mechanisms are mounted on the stirring rod. When the stirring rod agitates the pulp, the lifting assembly moves the stirring rod up and down, while the cleaning mechanisms move back and forth along the filter screen and the bottom of the digester to prevent scaling. While this device effectively agitates the pulp and prevents scaling, it cannot break up pulp clumps already adhering to the bottom surface of the digester. These clumps are difficult to remove with the normal pulp flow, affecting the digester's operating efficiency and causing blockages in the bottom pipes, increasing maintenance difficulty and cost.

[0004] Therefore, there is an urgent need for a stirring device for vertical continuous cookers to break up the slurry deposits adhering to the bottom surface of the cooker and discharge them from the cooker through normal slurry flow; at the same time, it reduces the possibility of slurry accumulation at the discharge port causing blockage. Utility Model Content

[0005] The purpose of this invention is to provide a stirring device for a vertical continuous cooker, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A stirring device for a vertical continuous cooker, disposed within the cooker, comprising: The scraping mechanism, transmission mechanism, and drive mechanism; The scraping mechanism includes a connecting sleeve, a flow guide seat is provided at the top of the connecting sleeve, and a plurality of scraping arms are provided at the bottom of the flow guide seat. One end of the plurality of scraping arms extends to the inner side of the top of the outlet flange of the cooker. The scraper arm has a guide plate at its bottom and along the outer periphery of the connecting sleeve, and the connecting sleeve has a material-pulling claw at its bottom. The transmission mechanism includes an output shaft. The scraping mechanism is connected to one end of the output shaft of the transmission mechanism via a connecting sleeve, and the other end of the output shaft is connected to the drive mechanism.

[0007] The stirring device for a vertical continuous cooker according to the present invention has at least the following technical effects: This stirring device for a vertical continuous digester extends one end of the scraper arm of the scraper mechanism to the inner top of the digester's outlet flange. When the device is running, the scraper arm scrapes the bottom of the digester, preventing the slurry from settling and forming clumps that adhere tightly to the bottom surface. This allows the slurry to be dispersed and discharged from the digester through the normal flow of slurry. It also increases the contact area between the wood chips and the diluent, avoiding problems of insufficient cleaning and dilution of the wood chips, ensuring the removal of residual chemicals from the wood chips, and thus improving the cleanliness of the wood chips. Simultaneously, the scraper claws further disperse the slurry deposited at the bottom, preventing it from adhering to the bottom surface of the digester due to its own weight and viscosity. This ensures the slurry can be smoothly discharged with the normal flow of slurry, reducing the possibility of slurry accumulation at the outlet causing blockage, lowering the risk of the scraper arm jamming, and thus ensuring the normal operation of the digester.

[0008] As a further improvement of this utility model, a scraper is provided at one end of the scraper arm.

[0009] Since fibers and impurities in the slurry tend to accumulate at the bottom and form clumps, a scraper is installed at one end of the scraper arm. The scraper can break up these stubborn deposits and scrape them off the bottom surface with its large scraping area, avoiding blockage caused by long-term accumulation, ensuring the cleanliness of the bottom of the digester, and allowing the slurry to be discharged smoothly.

[0010] As a further improvement of this utility model, the scraper is made of stainless steel.

[0011] Since the slurry has a certain acidity or alkalinity or contains corrosive components, the scraper is made of stainless steel. Stainless steel scrapers have excellent corrosion resistance and can be used for a long time in these corrosive environments without being damaged. In addition, the scraper has high hardness and strength, which can withstand greater pressure and friction, preventing the scraper from deforming or being damaged during operation, and greatly extending the service life of the scraper.

[0012] As a further embodiment of this utility model: the transmission mechanism further includes a bearing housing and a bearing seat connected to the top of the bearing housing, the bearing seat having a top cover, the top of the top cover being connected to the bottom of the outlet flange.

[0013] As a further embodiment of this utility model: an end cover is provided at the bottom of the bearing housing, a sealing cover is provided at the bottom of the end cover, and the output shaft passes through the top cover and the sealing cover.

[0014] The transmission mechanism also includes a bearing housing and a bearing seat connected to the top of the bearing housing. The bearing seat has a top cover, which is connected to the bottom of the outlet flange. The bearing housing has an end cover, and the end cover has a sealing cover. The output shaft passes through the top cover and the sealing cover. The bearing housing and bearing seat provide a stable mounting base for the output shaft, which can withstand the radial and axial loads generated during the rotation of the output shaft. The bearing housing and bearing seat can evenly distribute these forces, ensuring the normal operation and life of the output shaft. Furthermore, the top cover prevents the material inside the cooker from flowing out, the end cover provides axial positioning for the bearing, and the sealing cover effectively prevents the bearing lubricant from flowing out and provides a relatively closed and clean environment for the bearing, ensuring the stability and reliability of the entire device.

[0015] As a further embodiment of this utility model: a sealing cover is provided inside the bearing housing along the outer diameter of the output shaft, and a positioning sleeve is provided at the bottom of the sealing cover.

[0016] In the working environment of a continuous cooker, there is a risk of leakage from high-temperature, high-pressure slurry and liquid media. By installing a sealing cover along the outer diameter of the output shaft inside the bearing housing, these media can be prevented from entering the bearing housing, avoiding corrosion and damage to the bearings, ensuring that the bearings operate in a clean and stable environment, and extending the bearings' service life. Furthermore, a positioning sleeve is installed at the bottom of the sealing cover, which can provide precise positioning for the output shaft, effectively limiting the radial and axial displacement of the output shaft, preventing it from shifting or shaking during operation, allowing the output shaft to transmit power more smoothly, improving the working efficiency of the stirring device, and preventing scratches on the output shaft during bearing assembly and disassembly, ensuring the performance and lifespan of the output shaft.

[0017] As a further embodiment of this utility model: a fixing sleeve is provided on the inner side of the end cover along the bottom bearing of the output shaft.

[0018] By installing a fixing sleeve on the bottom bearing of the output shaft inside the end cover, the bearing can be axially positioned to prevent axial displacement due to external forces, ensuring that the bearing is always in the correct position and guaranteeing the stability of the entire transmission system. At the same time, the fixing sleeve increases the support rigidity of the output shaft at the bottom, reduces the deformation and vibration of the output shaft, improves the rotational accuracy of the output shaft, and ensures the smooth operation of the scraping mechanism, thereby ensuring the scraping effect and pulp production quality.

[0019] As a further embodiment of this utility model: the inner ring of the top cover is provided with a sealing element along the outer diameter of the output shaft, and a flange is provided on the outside of the sealing element.

[0020] Because the inner ring of the top cover is equipped with a seal along the outer diameter of the output shaft, and a flange is provided on the outside of the seal, when using the stirring device of the vertical continuous cooker, there are high-temperature and high-pressure slurry, liquid and other media inside the cooker. By squeezing the seal with the flange to make it fit tightly against the output shaft, it can effectively prevent these media from leaking from the gap between the top cover and the output shaft. This not only avoids the waste of slurry and liquid, but also prevents the high-temperature and high-pressure media from causing harm to surrounding equipment and operators, thus ensuring the safety of the production environment.

[0021] As a further improvement of this utility model, a baffle is provided at the bottom of the flange.

[0022] Because a baffle is installed at the bottom of the flange, the baffle can effectively prevent liquid from entering the bearing chamber inside the bearing housing along the output shaft, and reduce the entry of external impurities into the bearing chamber, thereby improving the sealing reliability of the bearing chamber.

[0023] As a further improvement of this utility model, a sealing ring is provided at the bottom of the bearing chamber inside the bearing housing.

[0024] By installing a sealing ring at the bottom of the bearing chamber inside the bearing housing, the sealing of the bottom of the bearing chamber inside the bearing housing can be effectively ensured, further preventing liquids and impurities from entering the bearing chamber through the output shaft, avoiding wear or damage to the components inside the bearing chamber, thereby ensuring the normal operation and stable performance of the bearing. Attached Figure Description

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 A three-dimensional structural diagram of a stirring device for a vertical continuous cooker; Figure 2 This is a cross-sectional schematic diagram of a stirring device used in a vertical continuous cooker. Figure 3 This is a schematic diagram of the scraping mechanism of a stirring device used in a vertical continuous cooker. Figure 4 This is a schematic diagram of the transmission mechanism of a stirring device for a vertical continuous cooker.

[0027] Figure label: 1. Cooker; 2. Connecting sleeve; 3. Flow guide seat; 4. Scraper arm; 401. Scraper; 5. Outlet flange; 6. Flow guide plate; 7. Feeding claw; 8. Output shaft; 9. Bearing housing; 10. Bearing seat; 11. Top cover; 12. End cover; 13. Sealing cover; 14. Sealing cap; 15. Positioning sleeve; 16. Fixing sleeve; 17. Flange; 18. Baffle; 19. Sealing ring. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] like Figure 1-3 The present invention provides a stirring device for a vertical continuous cooker, which is installed inside the cooker 1 and includes a scraping mechanism, a transmission mechanism, and a drive mechanism. The scraping mechanism includes a connecting sleeve 2, a guide seat 3 is provided on the top of the connecting sleeve 2, and a plurality of scraping arms 4 are provided on the bottom of the guide seat 3. One end of the scraping arms 4 extends to the inner side of the top of the outlet flange 5 of the cooker 1. A guide plate 6 is provided at the bottom of the scraping arms 4 and along the outer periphery of the connecting sleeve 2, and a material-pulling claw 7 is provided at the bottom of the connecting sleeve 2. The transmission mechanism includes an output shaft 8. The scraping mechanism is connected to one end of the output shaft 8 of the transmission mechanism through the connecting sleeve 2, and the other end of the output shaft 8 is connected to the drive mechanism.

[0035] Specifically, the stirring device for the vertical continuous digester extends one end of the scraper arm 4 of the scraper mechanism to the inner top of the outlet flange 5 of the digester 1. When the device is running, the scraper arm 4 can scrape the bottom of the digester 1 to prevent the slurry from settling at the bottom of the digester 1 and forming clumps that adhere tightly to the bottom surface of the digester 1. After being broken up, the slurry is discharged from the digester 1 through the normal flow of slurry. It also increases the contact area between the wood chips and the diluent, avoiding the problem of insufficient cleaning and dilution of the wood chips, ensuring that residual chemicals on the wood chips are removed, thereby improving the cleanliness of the wood chips. At the same time, the slurry deposited at the bottom can be further agitated and broken up by the slurry claw 7, preventing the slurry from adhering to the bottom surface of the digester due to its own weight and viscosity. This ensures that the slurry can be discharged smoothly with the normal flow of slurry, reducing the possibility of slurry accumulation at the outlet causing blockage, reducing the risk of the scraper arm 4 getting stuck, and thus ensuring the normal operation of the digester 1.

[0036] Furthermore, a scraper 401 is provided at one end of the scraper arm 4.

[0037] When in use, the drive mechanism is started to make the connecting sleeve 2 of the transmission mechanism drive the output shaft 8 to rotate, thereby driving the scraper arm 4 of the scraper mechanism to rotate. The scraper 401 at one end of the scraper arm 4 continuously stirs and scrapes the cooking liquid in the digester 1 through rotational force, so that the deposited pulp fibers and impurities are scraped off and dispersed by the scraper, so that the pulp fibers and impurities can be smoothly discharged with the normal pulp flow.

[0038] Specifically, since fibers and impurities in the slurry tend to accumulate at the bottom and form clumps, a scraper 401 is provided at one end of the scraper arm 4. The scraper 401 can break up these stubborn deposit clumps and scrape them off the bottom surface with its large scraping area, avoiding the blockage problem caused by long-term accumulation, ensuring the cleanliness of the bottom of the cooker 1, and allowing the slurry to be discharged smoothly.

[0039] Furthermore, the scraper 401 is made of stainless steel.

[0040] Specifically, since the slurry has a certain acidity or alkalinity or contains corrosive components, the scraper 401 is made of stainless steel. Stainless steel scraper 401 has excellent corrosion resistance and can be used for a long time in these corrosive environments without being damaged. In addition, the scraper 401 has high hardness and strength, and can withstand greater pressure and friction, preventing the scraper 401 from deforming or being damaged during operation, thus greatly extending the service life of the scraper 401.

[0041] like Figure 4 As shown, the transmission mechanism also includes a bearing housing 9 and a bearing seat 10 connected to the top of the bearing housing 9. The bearing seat 10 is provided with a top cover 11, and the top of the top cover 11 is connected to the bottom of the outlet flange 5. The bearing housing 9 is provided with an end cover 12 at the bottom, and a sealing cover 13 is provided at the bottom of the end cover 12. The output shaft 8 passes through the top cover 11 and the sealing cover 13.

[0042] Specifically, the transmission mechanism also includes a bearing housing 9 and a bearing seat 10 connected to the top of the bearing housing 9. The bearing seat 10 is topped with a top cover 11, which is connected to the bottom of the outlet flange 5. The bearing housing 9 is bottomped with an end cover 12, and the end cover 12 is bottomped with a sealing cover 13. The output shaft 8 passes through the top cover 11 and the sealing cover 13. The bearing housing 9 and the bearing seat 10 provide a stable mounting base for the output shaft 8, which can withstand the radial and axial loads generated by the output shaft 8 during rotation. The bearing housing 9 and the bearing seat 10 can evenly distribute these forces, ensuring the normal operation and lifespan of the output shaft 8. Furthermore, the top cover 11 can prevent the material in the cooker 1 from flowing out, the end cover 12 can provide axial positioning for the bearing, and the sealing cover 13 can effectively prevent the bearing lubricant from flowing out and provide a relatively closed and clean environment for the bearing, ensuring the stability and reliability of the entire device.

[0043] Furthermore, a sealing cover 14 is provided inside the bearing housing 9 along the outer diameter of the output shaft 8, and a positioning sleeve 15 is provided at the bottom of the sealing cover 14.

[0044] Specifically, in the working environment of the continuous cooker, there is a risk of leakage of high-temperature, high-pressure slurry and liquid media inside the cooker 1. By setting a sealing cover 14 along the outer diameter of the output shaft 8 inside the bearing housing 9, these media can be prevented from entering the bearing housing 9, avoiding corrosion and damage to the bearing, ensuring that the bearing operates in a clean and stable environment, and extending the service life of the bearing. Furthermore, a positioning sleeve 15 is set at the bottom of the sealing cover 14, which can provide precise positioning for the output shaft 8, effectively limiting the radial and axial displacement of the output shaft 8, preventing it from shifting or shaking during operation, so that the output shaft 8 can transmit power more smoothly and improve the working efficiency of the stirring device. It can also prevent the output shaft from being scratched during bearing assembly and disassembly, ensuring the performance and service life of the output shaft.

[0045] Furthermore, a fixing sleeve 16 is fitted inside the end cover 12 along the bottom bearing of the output shaft 8.

[0046] Specifically, by installing a fixing sleeve 16 on the bottom bearing of the output shaft 8 along the inner side of the end cover 12, the bearing can be axially positioned to prevent axial displacement due to external forces, ensuring that the bearing is always in the correct position and guaranteeing the stability of the entire transmission system. At the same time, the fixing sleeve 16 increases the support rigidity of the output shaft 8 at the bottom, reduces the deformation and vibration of the output shaft 8, improves the rotational accuracy of the output shaft 8, and ensures the smooth operation of the scraping mechanism, thereby ensuring the scraping effect and pulp production quality.

[0047] Furthermore, a seal is provided on the inner ring of the top cover 11 along the outer diameter of the output shaft 8, and a flange 17 is provided on the outer side of the seal.

[0048] Specifically, since the inner ring of the top cover 11 is provided with a sealing element along the outer diameter of the output shaft 8, and a flange 17 is provided on the outside of the sealing element, when the stirring device of the vertical continuous cooker is used, there are high-temperature and high-pressure slurry, liquid and other media inside the cooker 1. By squeezing the sealing element through the flange 17 to make it fit tightly against the output shaft 8, it can effectively prevent these media from leaking from the gap between the top cover 11 and the output shaft 8. This not only avoids the waste of slurry and liquid, but also prevents the high-temperature and high-pressure media from causing harm to the surrounding equipment and operators, thus ensuring the safety of the production environment.

[0049] Furthermore, a baffle 18 is provided at the bottom of flange 17.

[0050] Specifically, since the flange 17 is equipped with a baffle 18 at the bottom, the baffle 18 can effectively prevent liquid from entering the bearing chamber of the bearing housing 10 along the output shaft 8, and reduce the entry of external impurities into the bearing chamber, thereby improving the sealing reliability of the bearing chamber.

[0051] Furthermore, a sealing ring 19 is provided at the bottom of the bearing chamber within the bearing housing 10.

[0052] Specifically, by setting a sealing ring 19 at the bottom of the bearing chamber inside the bearing housing 10, the sealing of the bottom of the bearing chamber inside the bearing housing 10 can be effectively ensured, further preventing liquids and impurities from entering the bearing chamber through the output shaft 8, avoiding wear or damage to the components inside the bearing chamber, thereby ensuring the normal operation and stable performance of the bearing.

[0053] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A stirring device for a vertical continuous cooker, disposed inside the cooker, characterized in that, include: The scraping mechanism, transmission mechanism, and drive mechanism; The scraping mechanism includes a connecting sleeve, a flow guide seat is provided at the top of the connecting sleeve, and a plurality of scraping arms are provided at the bottom of the flow guide seat. One end of the plurality of scraping arms extends to the inner side of the top of the outlet flange of the cooker. The scraper arm has a guide plate at its bottom and along the outer periphery of the connecting sleeve, and the connecting sleeve has a material-pulling claw at its bottom. The transmission mechanism includes an output shaft. The scraping mechanism is connected to one end of the output shaft of the transmission mechanism via a connecting sleeve, and the other end of the output shaft is connected to the drive mechanism.

2. The stirring device for a vertical continuous cooker according to claim 1, characterized in that, A scraper is provided at one end of the scraper arm.

3. The stirring device for a vertical continuous cooker according to claim 2, characterized in that, The scraper is made of stainless steel.

4. The stirring device for a vertical continuous cooker according to claim 3, characterized in that, The transmission mechanism also includes a bearing housing and a bearing seat connected to the top of the bearing housing. The bearing seat is provided with a top cover, and the top of the top cover is connected to the bottom of the outlet flange.

5. The stirring device for a vertical continuous cooker according to claim 4, characterized in that, The bearing housing is provided with an end cover at the bottom, and a sealing cover is provided at the bottom of the end cover. The output shaft passes through the top cover and the sealing cover.

6. The stirring device for a vertical continuous cooker according to claim 5, characterized in that, A sealing cover is provided inside the bearing housing along the outer diameter of the output shaft, and a positioning sleeve is provided at the bottom of the sealing cover.

7. The stirring device for a vertical continuous cooker according to claim 6, characterized in that, A fixing sleeve is fitted inside the end cover along the bottom bearing of the output shaft.

8. The stirring device for a vertical continuous cooker according to claim 7, characterized in that, The inner ring of the top cover is provided with a sealing element along the outer diameter of the output shaft, and a flange is provided on the outside of the sealing element.

9. The stirring device for a vertical continuous cooker according to claim 8, characterized in that, A baffle is provided at the bottom of the flange.

10. The stirring device for a vertical continuous cooker according to claim 9, characterized in that, A sealing ring is provided at the bottom of the bearing chamber inside the bearing housing.

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