Fluidized bed upper stirrer
By designing an upper agitator for a fluidized bed, the mixing range is expanded using inclined and vertical rod assemblies, solving the problem of blind spots in mixing and achieving uniform mixing of materials and stable use of the agitator.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING KENING VACUUM TECHNOLOGY CO LTD
- Filing Date
- 2026-03-16
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional fluidized bed agitators have a mixing blind zone in the upper part, which leads to uneven mixing of materials and significant differences in the physical and chemical properties of materials in some areas.
A fluidized bed upper agitator was designed, including components such as a stirring rod, a reducer, a support, inclined rods, and vertical rods. The coordination of the inclined rods and vertical rods expands the mixing range and ensures that the materials are fully mixed. Protective components protect the hinged joints to prevent material adhesion.
It effectively eliminates blind spots in the mixing process, improves the uniformity of material mixing, reduces local differences in properties, and extends the service life of the mixer.
Smart Images
Figure CN224127080U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluidized bed mixing technology, specifically to an upper fluidized bed mixer. Background Technology
[0002] In numerous industrial applications of fluidized bed reactors (furnaces), the performance of the stirring device directly determines the uniformity of material mixing, reaction efficiency, and the quality of the final product, making it one of the core elements for the efficient and stable operation of a fluidized bed system. Fluidized bed technology, with its unique gas-solid or liquid-solid contact method, plays an irreplaceable role in key areas such as chemical synthesis, pharmaceutical processes, food processing, and energy conversion. By fluidizing solid particles under the action of a fluid, it greatly enhances the heat and mass transfer processes between substances.
[0003] However, in existing fluidized bed mixing systems, traditional agitators located at the top of the fluidized bed share a common problem during actual operation: there is a certain blind zone below the agitator. The root cause of this problem is that the mixing effect of the upper agitator mainly relies on the direct drive of the stirring rod, and its mixing energy transfer range is limited, making it difficult to effectively cover the area below the stirring rod. In this area, the material lacks mixing power, resulting in a low rate of thorough mixing with the surrounding material. In severe cases, this can lead to differences in the physical and chemical properties of the local material compared to other areas. Utility Model Content
[0004] The purpose of this invention is to provide an upper agitator for a fluidized bed to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a fluidized bed upper agitator, comprising: a furnace body, a connecting seat fixedly connected to the top of the furnace body, an agitator rod rotatably connected to the inner wall of the connecting seat, a speed reducer fixedly connected to the top of the agitator rod, an agitator motor fixedly connected to the input shaft of the speed reducer, a bracket fixedly connected to the bottom of the outer shell of the agitator motor, the bottom of the bracket being fixedly connected to the furnace body, two pairs of protrusions fixedly connected to the outer wall of the agitator rod from top to bottom, an inclined rod provided inside the protrusions, a pair of vertical rods provided on the outer side of the agitator rod, the vertical rods being hinged to the inclined rods via pins, the inclined rods being hinged to the protrusions via pins, and multiple agitator blades fixedly connected to the outer walls of both the agitator rod and the vertical rods.
[0006] Preferably, the bottom end of the stirring rod is fixedly connected with a lug.
[0007] Preferably, a flat-pressure air supply pipe is installed on the front side of the connector.
[0008] Preferably, a protective assembly is fitted on the outer wall of the pin, the protective assembly including: a sealing sleeve, the sealing sleeve being located on the outer side of the end of the pin, the sealing sleeve being threadedly connected to the protrusion through a first threaded groove, a pair of threaded cylinders being fitted on the outer wall of the pin, the threaded cylinders being threadedly connected to the inclined rod through a second threaded groove, and a pair of semi-circular rings being connected to the end of the threaded cylinder away from the inclined rod, the semi-circular rings being in contact with the contact surface of the protrusion.
[0009] Preferably, the surface of the semicircular ring away from the threaded cylinder has multiple grooves, and a screw is provided inside the groove, the screw passing through the semicircular ring and threadedly connected to the threaded cylinder.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This fluidized bed upper agitator has the following advantages over traditional technology:
[0011] Through the coordination between the furnace body, connecting seat, stirring rod, reducer, stirring motor, support and stirring frame, when it is necessary to mix and stir the materials inside the furnace body, the operator first supplies power to the stirring motor to make it run. After being driven by the reducer, the stirring rod starts to rotate. During this process, the inclined rod is in the initial state, and the stirring blades below the vertical rod will provide stirring power to the materials below the stirring rod inside the furnace body, increasing the rate of thorough mixing of the surrounding materials. To a certain extent, it reduces the probability of the physical and chemical properties of the local materials differing from those of other areas. After the materials inside the furnace body are evenly stirred, the rotation speed of the stirring rod gradually increases, and the centrifugal force on the pair of vertical rods and multiple inclined rods on the outside of the stirring rod gradually increases. At this time, the inclined rods tend to be perpendicular to the stirring rod, and the vertical rods move away from the stirring rod. The multiple stirring blades on the outer wall of the vertical rod can continue to stir the materials in the upper part of the furnace body.
[0012] Through the cooperation between the furnace body, connecting seat, stirring rod, reducer, stirring motor, bracket, stirring frame and protective components, the threaded cylinder and sealing cylinder distributed on the outside of the pin rod can protect the hinge connection between the pin rod and the protrusion, preventing the material inside the furnace body from adhering to this point, so that the two ends of the inclined rod can swing smoothly for a long time, ensuring the long-term stable use of the stirring frame. After long-term use, when performing maintenance work on the inside of the furnace body, if the semi-circular ring that is in contact with the inner wall of the protrusion is severely worn, the operator can turn the screw counterclockwise to separate it from the threaded cylinder, so that the semi-circular ring with a smooth surface and low frictional resistance can be disassembled and replaced. Attached Figure Description
[0013] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0016] Figure 3 for Figure 2 Top partial sectional view of the stirring rod, protrusion, and slant bar;
[0017] Figure 4 for Figure 3 Enlarged view of point B in the middle;
[0018] Figure 5 for Figure 4 A bottom view of the middle semicircular ring;
[0019] Figure 6 for Figure 1 A three-dimensional structural diagram of the mixing motor, reducer, and connecting base.
[0020] In the diagram: 1. Furnace body, 2. Connecting seat, 3. Stirring rod, 4. Reducer, 5. Stirring motor, 6. Support, 7. Protrusion, 8. Diagonal rod, 9. Vertical rod, 10. Pin, 11. Stirring blade, 12. Sealing cylinder, 13. First threaded groove, 14. Threaded cylinder, 15. Second threaded groove, 16. Semicircular ring, 17. Groove, 18. Screw, 19. Lug, 20. Flat pressure gas supply pipe fitting. Detailed Implementation
[0021] 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.
[0022] Please see Figures 1-6 This utility model provides a technical solution: a fluidized bed upper agitator, comprising: a furnace body 1, a connecting seat 2 fixedly connected to the top of the furnace body 1, an agitator 3 rotatably connected to the inner wall of the connecting seat 2, a reducer 4 fixedly connected to the top of the agitator 3, an agitator motor 5 fixedly connected to the input shaft of the reducer 4, a bracket 6 fixedly connected to the bottom of the outer shell of the agitator motor 5, the bottom of the bracket 6 being fixedly connected to the furnace body 1, two pairs of protrusions 7 being fixedly connected from top to bottom on the outer wall of the agitator 3, an inclined rod 8 being provided inside the protrusion 7, a pair of vertical rods 9 being provided on the outer side of the agitator 3, the vertical rods 9 being hinged to the inclined rods 8 by pins 10, the inclined rods 8 being hinged to the protrusions 7 by pins 10, and multiple agitator blades 11 being fixedly connected to the outer walls of both the agitator 3 and the vertical rods 9.
[0023] In the specific implementation process, it is worth noting that the furnace body 1, as the working space of the entire agitator, is made of high-temperature and corrosion-resistant alloy steel to adapt to the complex working environment inside the fluidized bed and ensure long-term stable operation. The connecting seat 2 is tightly connected to the top of the furnace body 1 with high-strength bolts to ensure a firm connection and prevent loosening during the agitation process. The agitator rod 3 adopts a hollow structure to reduce its own weight while ensuring sufficient strength. The reducer 4 adopts a cycloidal pinwheel reducer, which can effectively convert the high-speed rotation of the agitator motor 5 into the appropriate speed required by the agitator rod 3. The agitator motor 5 is an adjustable speed motor that can provide sufficient power for agitation. The bracket 6 has sufficient rigidity and stability to provide reliable support for the agitator motor 5. The protrusion 7 is welded to the agitator rod 3 as a whole to ensure connection strength. The inclined rod 8 is hinged inside, allowing the inclined rod 8 to rotate flexibly. The pin 10 is made of high-strength alloy steel and the surface is quenched to improve hardness and wear resistance, ensuring a reliable connection at the hinge. The agitator blade 11 is inclined in shape to generate agitation force during the agitation process.
[0024] Furthermore, a lug 19 is fixedly attached to the bottom end of the stirring rod 3.
[0025] In the specific implementation process, it is worth noting that the lug 19 is used to reserve a connection position for the bottom agitator to be connected to the bottom end of the stirring rod 3.
[0026] Furthermore, a flat pressure air supply fitting 20 is installed on the front side of the connector 2.
[0027] In the specific implementation process, it is worth noting that the flat pressure air supply pipe fitting 20 is used to provide stable air pressure to the inside of the connecting seat 2, so that air pressure is applied above the high temperature resistant sealed bearing required for the connection between the connecting seat 2 and the stirring rod 3. This air pressure is equal to the air pressure inside the furnace body 1, which can improve the stable connection between the connecting seat 2 and the stirring rod 3.
[0028] Furthermore, a protective assembly is fitted on the outer wall of the pin 10. The protective assembly includes a sealing sleeve 12, which is located on the outer side of the end of the pin 10. The sealing sleeve 12 is threadedly connected to the protrusion 7 through the first threaded groove 13. A pair of threaded cylinders 14 are fitted on the outer wall of the pin 10. The threaded cylinders 14 are threadedly connected to the inclined rod 8 through the second threaded groove 15. A pair of semi-circular rings 16 are connected to the end of the threaded cylinders 14 away from the inclined rod 8. The semi-circular rings 16 are in contact with the contact surface of the protrusion 7.
[0029] In the specific implementation process, it is worth noting that the function of the sealing cylinder 12 is to prevent material from entering the connection part between the pin rod 10 and the protrusion 7. Its material is the same as that of the stirring rod 3, which can withstand the high temperature inside the furnace. The first threaded groove 13 can connect the sealing cylinder 12 and the protrusion 7. The second threaded groove 15 can make the threaded cylinder 14 and the inclined rod 8 connected stably. The semi-circular ring 16 is made of high-strength, smooth metal material. The contact surface with the protrusion 7 can reduce frictional resistance and ensure that the inclined rod 8 can swing flexibly.
[0030] Furthermore, a plurality of grooves 17 are provided on the surface of the semicircular ring 16 away from the threaded cylinder 14, and screws 18 are provided inside the grooves 17. The screws 18 pass through the semicircular ring 16 and are threadedly connected to the threaded cylinder 14.
[0031] In the specific implementation process, it is worth noting that the depth of the groove 17 is sufficient for the screw 18 to be embedded. The screw 18 will not be in contact with the surface of the protrusion 7. The screw 18 is made of stainless steel, which has good corrosion resistance and strength, and can ensure a reliable connection between the semi-circular ring 16 and the threaded cylinder 14.
[0032] Working principle:
[0033] Stirring principle one:
[0034] When it is necessary to mix and stir the materials inside the furnace body 1, the operator first supplies power to the stirring motor 5 to make it run. The power of the stirring motor 5 is transmitted through the reducer 4, which drives the stirring rod 3 to start rotating. During this process, the inclined rod 8 on the stirring frame is in the initial state, and the stirring blade 11 below the vertical rod 9 is located in the area below the stirring rod 3 inside the furnace body 1. Since this area is prone to forming a stirring blind zone under traditional stirring methods, the materials are difficult to be fully stirred. However, the stirring blade 11 below the vertical rod 9 can provide dedicated stirring power for this part of the materials, effectively improving the rate of full mixing of the surrounding materials. To a certain extent, it reduces the probability of the physical and chemical properties of the local materials differing from those of other areas, thus improving the uneven mixing of materials inside the furnace body 1.
[0035] Stirring principle two:
[0036] After the materials inside the furnace body are mixed to a certain extent in the initial stirring stage, in order to achieve more comprehensive and uniform stirring, the rotation speed of the stirring rod 3 gradually increases. As the rotation speed of the stirring rod 3 increases, the centrifugal force on the pair of vertical rods 9 and multiple inclined rods 8 on the outside of the stirring rod 3 gradually increases. Under the action of centrifugal force, the inclined rods 8 tend to be perpendicular to the stirring rod 3, while the vertical rods 9 move away from the stirring rod 3. At this time, the stirring range of the multiple stirring blades 11 provided on the outer wall of the vertical rods 9 expands, and can continue to stir the materials in the upper part of the furnace body 1. In this stage, the stirring frame automatically adjusts the stirring range through the action of centrifugal force, so that the materials in the upper part of the furnace body 1 can also be fully stirred, thereby realizing comprehensive stirring of the materials inside the entire furnace body 1 from bottom to top, and improving the quality of material mixing.
[0037] The mixing rack returns to its initial state:
[0038] After the materials inside the furnace body 1 are mixed and stirred, the operator stops supplying power to the stirring motor 5, and the stirring rod 3 stops rotating. At this time, the vertical rod 9 and the inclined rod 8 begin to fall due to their own gravity. The stirring blade 11 at the bottom of the outer wall of the vertical rod 9 is finally located in the area below the stirring rod 3, so that the agitator can automatically return to the initial state after each stirring, ready for the next use. When the materials inside the furnace body 1 need to be stirred again, the agitator can start working directly from the initial state and continue to provide stirring power to the materials in the area below the stirring rod 3. This avoids the problem of uneven stirring caused by improper position of the stirring frame and ensures that the agitator can continuously and stably perform the stirring function.
[0039] Pin joint protection:
[0040] The threaded cylinder 14 and sealing cylinder 12 distributed on the outside of the pin 10 can form an effective protective barrier to protect the hinge connection between the pin 10 and the protrusion 7. During the stirring process, the material inside the furnace body 1 may come into contact with this connection. Without the protection of the protective components, the material is easy to adhere here, affecting the swing flexibility of the two ends of the inclined rod 8. The presence of the threaded cylinder 14 and sealing cylinder 12 prevents the material from adhering, ensuring that the two ends of the inclined rod 8 can swing smoothly for a long time, thereby ensuring the long-term stable use of the stirring rack. After long-term use, when performing maintenance work on the inside of the furnace body, if the semi-circular ring 16 that is in contact with the inner wall of the protrusion 7 is severely worn, the operator only needs to turn the screw 18 counterclockwise to separate it from the threaded cylinder 14, and the semi-circular ring 16 with a smooth surface and low frictional resistance can be disassembled and replaced, which is convenient and quick to complete the maintenance work and extends the service life of the stirrer.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fluidized bed upper agitator, comprising: The furnace body (1) is characterized in that: a connecting seat (2) is fixedly connected to the top of the furnace body (1), a stirring rod (3) is rotatably connected to the inner wall of the connecting seat (2), a speed reducer (4) is fixedly connected to the top of the stirring rod (3), a stirring motor (5) is fixedly connected to the input shaft of the speed reducer (4), a bracket (6) is fixedly connected to the bottom of the outer shell of the stirring motor (5), the bottom of the bracket (6) is fixedly connected to the furnace body (1), two pairs of protrusions (7) are fixedly connected to the outer wall of the stirring rod (3) from top to bottom, an inclined rod (8) is provided inside the protrusion (7), a pair of vertical rods (9) are provided on the outer side of the stirring rod (3), the vertical rod (9) is hinged to the inclined rod (8) through a pin (10), the inclined rod (8) is hinged to the protrusion (7) through a pin (10), and multiple stirring blades (11) are fixedly connected to the outer walls of the stirring rod (3) and the vertical rod (9).
2. A fluid bed upper impeller according to claim 1 wherein: The bottom end of the stirring rod (3) is fixed with a lug (19).
3. A fluid bed upper impeller according to claim 1 wherein: A flat pressure air supply pipe fitting (20) is installed on the front side of the connecting seat (2).
4. A fluid bed upper impeller according to claim 1 wherein: The outer wall of the pin (10) is fitted with a protective component, which includes a sealing sleeve (12), the sealing sleeve (12) being located outside the end of the pin (10), the sealing sleeve (12) being threadedly connected to the protrusion (7) through a first threaded groove (13), a pair of threaded cylinders (14) being fitted on the outer wall of the pin (10), the threaded cylinders (14) being threadedly connected to the inclined rod (8) through a second threaded groove (15), and a pair of semi-circular rings (16) being connected to the end of the threaded cylinders (14) away from the inclined rod (8), the semi-circular rings (16) being in contact with the contact surface of the protrusion (7).
5. A fluid bed upper impeller according to claim 4 wherein: The semicircular ring (16) has multiple grooves (17) on its surface away from the threaded cylinder (14). Screws (18) are provided inside the grooves (17), and the screws (18) pass through the semicircular ring (16) and are threadedly connected to the threaded cylinder (14).