Fluidized bed heating cell automated disassembly apparatus and method

Abstract

A kind of fluidized bed heating small chamber automatic dismounting device and method, including horizontal moving trolley, turnover mechanism, transfer bracket trolley, heating small chamber lifting and fixing device, powder collection device;Horizontal moving trolley includes reduction motor, horizontal guide rail, wheel, trolley car body;Reduction motor is installed on trolley car body, reduction motor drives wheel and drives trolley car body to move along horizontal rail;Turnover mechanism includes reduction motor support, reduction motor, driving turnover shaft, turnover bucket, turnover support;Reduction motor is installed on reduction motor support, reduction motor support and two turnover supports are all installed on trolley car body, turnover bucket is installed on turnover support, reduction motor is connected with driving turnover shaft, driving turnover shaft is connected with dynamic turnover bucket, and turnover bucket is driven to overturn.

Description

Technical Field

[0001] This patent relates to the field of spent fuel technology, specifically to an automated disassembly device for a fluidized bed heating chamber. Background Technology

[0002] In the U-tail process of spent fuel reprocessing, the fluidized bed is the most important equipment in the entire denitrification system. There are two units operating simultaneously on-site. The fluidized bed heating chamber is a key component for increasing the heat of the fluidized bed and forming a fluidized state. However, based on current usage and operational experience, after prolonged operation, the molten material tends to crystallize on the distribution plate, affecting the heat dissipation of the heating rod 33 and causing it to burn out. This results in the fluidized bed body 31 failing to meet process requirements, thus affecting the quality of the uranium powder. Therefore, it is necessary to completely disassemble the heating chamber, repair the heating rod 33, and then reassemble it. The fluidized bed equipment has limited space, and the heating chamber itself weighs 325 kg, reaching 450 kg when containing powder. Currently, there are no load-bearing points designed inside the heating chamber, making manual disassembly extremely difficult during maintenance. From disassembly to reassembly after maintenance, it will take at least 3 days. Furthermore, powder residue remaining in the heating chamber during disassembly can leak out, permeating the equipment room and causing radiation dose levels to exceed threshold standards, posing a health risk to maintenance personnel. Statistics show that the two fluidized bed heating chambers require maintenance an average of 4-5 times per month. The existing heating chamber disassembly fixtures only have lifting capabilities and a low degree of automation, lacking functions for tilting and powder collection. Summary of the Invention

[0003] The purpose of this invention is to combine three mechanisms—transfer, lifting, and tilting—into a disassembly fixture for a fluidized bed heating chamber, thereby minimizing the maintenance time of the fluidized bed heating chamber in a radioactive environment. Simultaneously, it collects product powder leaked during disassembly, preventing excessive radioactive atmosphere within the equipment chamber, reducing the impact of heating chamber malfunctions on the production line, and ensuring the stable operation of the main process system.

[0004] The technical solution of the present invention is as follows: an automated disassembly device for a fluidized bed heating chamber, comprising a horizontal moving trolley, a tilting mechanism, a transfer bracket trolley, a heating chamber lifting and fixing device, and a powder collection device;

[0005] The horizontally moving trolley includes a geared motor, a horizontal guide rail, wheels, and a trolley body; the geared motor is mounted on the trolley body and drives the wheels to move the trolley body along the horizontal track;

[0006] The tilting mechanism includes a geared motor bracket, a geared motor, a drive tilting shaft, a tilting drum, and tilting supports. The geared motor is mounted on the geared motor bracket, and the geared motor bracket and two tilting supports are mounted on the trolley body. The tilting drum is mounted on the tilting supports. The geared motor is connected to the drive tilting shaft, and the drive tilting shaft is connected to the tilting drum, which drives the tilting drum to tilt.

[0007] The lifting and fixing device includes a lifting electric push rod, an electric push rod tray, guide rod A, linear bearings, guide rod B, clamping grippers, and receiving flanges; the lifting electric push rod is connected to the tilting bucket, and the electric push rod tray is installed on the lifting electric push rod; guide rods A and B are installed on both sides of the tilting bucket, two linear bearings are installed on the receiving flanges to limit guide rods A and B, and clamping grippers are installed on the receiving flanges;

[0008] The powder collecting device includes an expandable material cylinder, an openable zipper, and a discharge port; wherein the expandable material cylinder has an openable zipper and a discharge port at the bottom.

[0009] The car is equipped with anti-rollover hooks.

[0010] The bottom of the expandable material cylinder has a stainless steel clamp, and the top is equipped with an adjustable opening seal.

[0011] The transfer carriage includes casters, support plates, and heating chamber brackets.

[0012] An automated disassembly method for a fluidized bed heating chamber includes the following steps:

[0013] S1: Fix the lower end of the powder collection device to the heating chamber cylinder, drive the horizontal moving trolley to directly below the fluidized bed, and release the clamping grip.

[0014] S2: The lifting electric push rod rises vertically until it reaches the contact point between the clamping gripper, the receiving flange, and the lower flange surface. Then, the connection between the heating chamber cylinder and the fluidized bed body is disassembled, the clamping gripper is closed and tightened, and the powder collection device wraps around the fluidized bed body, fixing the upper end of the powder collection device to the fluidized bed body.

[0015] S3: The lifting electric push rod descends, removing the heating rod from the fluidized bed body, separating the powder collection device from the fluidized bed body, and performing the first powder collection through the discharge port;

[0016] S4: Continue to lower the lifting electric push rod until the clamping device contacts the surface of the tilting mechanism, and then connect and fasten the clamping device to the tilting mechanism; push the transfer bracket trolley to align with the tilting mechanism; the tilting mechanism drives the heating chamber to tilt, and at this time, the powder is collected for the second time through the discharge port;

[0017] S5: After collection is complete, unzip the powder collection device and remove the powder block from the gap between the heating rods.

[0018] In step S1, the lifting mechanism and fixing device are placed in a vertical position on the horizontal plane.

[0019] In S3, the lifting electric push rod descends by 800mm.

[0020] In step S3, the heating rod is removed from the fluidized bed body, and after standing for a few minutes, the powder collection device is separated from the fluidized bed body.

[0021] In step S4, the transfer carriage is finely adjusted during the flipping process so that the heating chamber falls into the transfer carriage precisely after completing the flipping action.

[0022] It also includes S6: transporting the heating chamber to the maintenance station to begin the disassembly and maintenance process. After the disassembly and maintenance are completed, the chamber is reassembled in reverse order, and the powder collection during the disassembly process is completed at the same time.

[0023] The significant advantages of this invention are:

[0024] 1. This invention enables the lifting and tilting of the heating chamber via remote control, avoiding close contact with personnel and reducing the risk of injury.

[0025] 2. This invention enables the disassembly, maintenance, and reassembly of the heating chamber through a lifting mechanism, a tilting mechanism, and a fixing mechanism, thereby improving work efficiency and reducing the labor intensity of personnel.

[0026] 3. This invention achieves complete collection of radioactive powder during disassembly through a powder collection device, preventing powder from leaking onto the hot chamber floor and reducing the radioactivity level inside the hot chamber. Attached Figure Description

[0027] Figure 1 Schematic diagram of the disassembly fixture for the fluidized bed heating chamber

[0028] Figure 2 Schematic diagram of a horizontally moving trolley

[0029] Figure 3 Schematic diagram of the flipping mechanism

[0030] Figure 4 Schematic diagram of the transfer tray trolley

[0031] Figure 5 Schematic diagram of lifting and fixing device

[0032] Figure 6 Schematic diagram of powder collection device

[0033] Figure 7 Schematic diagram of the fluidized bed structure

[0034] Figure 8 Schematic diagram of the structure of the fluidized bed heating chamber

[0035] In the diagram: 1-Horizontal moving trolley, 2-Tilting mechanism, 3-Transfer bracket trolley, 4-Lifting and fixing device, 5-Powder collection device;

[0036] 6- Gear motor; 7- Horizontal guide rail; 8- Wheels; 9- Anti-tipping hook; 10- Trolley body;

[0037] 11- Gear motor bracket 12- Gear motor 13- Active tilting shaft 14- Tilting bucket 15- Tilting support

[0038] 16-Wheel casters 17-Support plate 18-Heating chamber bracket

[0039] 19- Lifting Electric Push Rod 20- Electric Push Rod Tray 21- Guide Rod A 22- Linear Bearing 23- Guide Rod B 24- Clamping Grip 25- Receiving Flange

[0040] 26-Adjustable opening seal 27-Extendable material cylinder 28-Openable zipper 29-Discharge port 30-Stainless steel clamp

[0041] 31-Fluidized bed body; 32-Heating chamber

[0042] 33-Heating rod; 34-Heating chamber cylinder; 35-Lower flange Detailed Implementation

[0043] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0044] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0045] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0046] An automated disassembly device for fluidized bed heating chambers, such as Figure 1 As shown, the automated disassembly fixture for the fluidized bed heating chamber includes a horizontal moving trolley 1, a tilting mechanism 2, a transfer bracket trolley 3, a heating chamber lifting and fixing device 4, and a powder collection device 5.

[0047] like Figure 2 As shown, the horizontally moving trolley 1 includes a geared motor 6, a horizontal guide rail 7, wheels 8, an anti-tipping hook 9, and a trolley body 10. The geared motor 6 is installed on the trolley body 10, and the geared motor 6 drives the wheels 8 to move the trolley body 10 along the horizontal guide rail 7. The anti-tipping hook 9 is installed on the trolley body 10 to prevent the trolley body from tipping over.

[0048] like Figure 3 As shown, the flipping mechanism 2 includes a geared motor bracket 11, a geared motor 12, an active flipping shaft 13, a flipping bucket 14, and a flipping support 15. The geared motor 12 is mounted on the geared motor bracket 11, and the geared motor bracket 11 and the two flipping supports 15 are all mounted on the trolley body 10. The flipping bucket 14 is mounted on the flipping support 15. The geared motor 12 is connected to the active flipping shaft 13, and the active flipping shaft 13 is connected to the active flipping bucket 14, driving the flipping bucket 14 to flip.

[0049] like Figure 4 As shown, the transfer carriage trolley 3 includes casters 16, a support plate 17, and a heating chamber bracket 18; four casters 16 are installed below the support plate 17, and two heating chamber brackets are installed above the support plate 17 to support the heating chamber.

[0050] like Figure 5 As shown, the lifting and fixing device 4 includes a lifting electric push rod 19, an electric push rod tray 20, a guide rod A21, a linear bearing 22, a guide rod B23, a clamping gripper 24, and a receiving flange 25. The lifting electric push rod 19 is mounted on the tilting drum 14, and the electric push rod tray 20 is mounted on the lifting electric push rod 19. The guide rod A21 and the guide rod B23 are mounted on both sides of the tilting drum 14, and two linear bearings 22 are mounted on the receiving flange 25 to limit the guide rod A21 and the guide rod B23. The clamping gripper 24 is mounted on the receiving flange 25.

[0051] like Figure 6As shown, the powder collection device 5 includes an adjustable opening seal 26, an expandable material cylinder 27, an openable zipper 28, a discharge port 29, and a stainless steel clamp 30. The expandable material cylinder 27 has an openable zipper 28, a discharge port 29 at its lower part, a stainless steel clamp 30 at its bottom, and an adjustable opening seal 26 at its upper part. The adjustable opening seal 26 is used to fix the powder collection device 5 to the fluidized bed body 31. The expandable material cylinder 27 is used to collect powder leaked during disassembly. The openable zipper 28 is used to remove agglomerated powder that cannot be discharged through the discharge port 29. The discharge port 29 is used to discharge the collected powder. The stainless steel clamp 30 is used to fix the powder collection device 5 to the heating chamber cylinder 32.

[0052] The fluidized bed body 31 is installed on the hot chamber steel structure, and the heating chamber 32 is installed below the fluidized bed body 31 by bolts.

[0053] The heating chamber 32 includes a heating rod 33, a heating chamber cylinder 34, and a lower flange 35. The heating rod 33 is installed on the heating chamber cylinder 34 to increase the temperature inside the fluidized bed. The lower flange 35 is installed below the heating chamber cylinder 34. The powder collection device 5 is integrally machined to collect powder during the disassembly process.

[0054] In this invention, the structural design is reasonable. While fulfilling its functions, the structure is simple, the working principle is straightforward, and work efficiency is greatly improved. It reduces the workload and radiation dose for maintenance personnel, and increases the maintenance space available for them.

[0055] An automated disassembly method for a fluidized bed heating chamber includes the following steps:

[0056] S1: Fix the lower end of the powder collection device (5) to the heating chamber cylinder 34, drive the horizontal moving trolley (1) to the bottom of the fluidized bed 31, place the lifting mechanism and fixing device (4) in a state perpendicular to the horizontal plane and loosen the gripping clamp 24.

[0057] S2: Locking and flipping mechanism (2), lifting electric push rod 19 rises vertically, and after it rises to the point where the gripping clamp 24, receiving flange 25 and lower flange 35 are in contact, the connecting bolts between heating chamber cylinder 34 and fluidized bed body 31 are removed, the gripping clamp 24 is closed and tightened, and the powder collection device (5) is lifted to continue wrapping the fluidized bed body 31, so that the upper end of the powder collection device 5 is fixed to the fluidized bed body 31.

[0058] S3: The lifting electric push rod 19 descends 800mm. At this time, the heating rod 33 has been removed from the fluidized bed body 31. At this time, there is residual powder in the powder collection device 5 after the heating chamber 32 is separated from the fluidized bed body 31. After standing for a few minutes, the powder collection device 5 is separated from the fluidized bed body 31, and the upper edge structure of the powder collection device 5 is tightened to ensure the powder is sealed. At this time, the first powder collection is carried out through the discharge port (23).

[0059] S4: Continue to lower the lifting electric push rod 19 until the clamping device 25 contacts the surface of the flipping mechanism (2), and connect and fasten the clamping device 25 to the flipping mechanism 2; drive the horizontal moving trolley 1 to the flipping station, and push the transfer bracket trolley 3 to align with the flipping mechanism 2; drive the flipping mechanism 2 to flip the heating chamber 32, and finely adjust the transfer bracket trolley 3 during the flipping process so that the heating chamber 32 falls into the transfer bracket trolley 3 after completing the flipping action; at this time, the powder is collected for the second time through the discharge port 29.

[0060] S5: After collection is complete, unzip the openable zipper 28 on the powder collection device 5 and remove the powder block from the gap in the heating rod 33. At this point, all powder has been collected.

[0061] S6: After the heating chamber 32 is placed stably, the personnel push the trolley to transport it to the maintenance station to begin the disassembly and maintenance process. After the disassembly and maintenance are completed, the heating chamber 32 is reassembled in reverse order, thereby realizing the disassembly and reassembly of the heating chamber 32 and collecting the powder during the disassembly process.

[0062] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0063] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. An automated disassembly device for a fluidized bed heating chamber, characterized in that: It includes a horizontal moving trolley (1), a tilting mechanism (2), a transfer bracket trolley (3), a heating chamber lifting and fixing device (4), and a powder collecting device (5); The horizontal moving trolley (1) includes a first reduction motor (6), a horizontal guide rail (7), wheels (8), and a trolley body (10); the first reduction motor (6) is installed on the trolley body (10), and the first reduction motor (6) drives the wheels (8) to move the trolley body (10) along the horizontal guide rail (7); The flipping mechanism (2) includes a geared motor bracket (11), a second geared motor (12), an active flipping shaft (13), a flipping bucket (14), and a flipping support (15). The second geared motor (12) is mounted on the geared motor bracket (11), and the geared motor bracket (11) and the two flipping supports (15) are mounted on the trolley body (10). The flipping bucket (14) is mounted on the flipping support (15). The second geared motor (12) is connected to the active flipping shaft (13), and the active flipping shaft (13) is connected to the flipping bucket (14), driving the flipping bucket (14) to flip. The lifting and fixing device (4) includes a lifting electric push rod (19), an electric push rod tray (20), a guide rod A (21), a linear bearing (22), a guide rod B (23), a clamping gripper (24), and a receiving flange (25); the lifting electric push rod (19) is connected to the tilting bucket (14), and the electric push rod tray (20) is installed on the lifting electric push rod (19); the guide rod A (21) and the guide rod B (23) are installed on both sides of the tilting bucket (14), and two linear bearings (22) are installed on the receiving flange (25) to limit the guide rod A (21) and the guide rod B (23), and the clamping gripper (24) is installed on the receiving flange (25); The powder collecting device (5) includes a stretchable material cylinder (27), an openable zipper (28), and a discharge port (29); wherein the stretchable material cylinder (27) has an openable zipper (28), and the stretchable material cylinder (27) has a discharge port (29) at its lower part.

2. The automated disassembly device for a fluidized bed heating chamber according to claim 1, characterized in that: Anti-rollover hooks (9) are installed on the car body (10).

3. The automated disassembly device for a fluidized bed heating chamber according to claim 1, characterized in that: The expandable material cylinder (27) has a stainless steel clamp (30) at the bottom and an adjustable opening seal (26) at the top.

4. The automated disassembly device for a fluidized bed heating chamber according to claim 1, characterized in that: The transfer carriage (3) includes casters (16), support plate (17), and heating chamber bracket (18).

5. A method for automatically disassembling a fluidized bed heating chamber, using the automated disassembly device for fluidized bed heating chambers as described in any one of claims 1-4, characterized in that: Includes the following steps: S1: Fix the lower end of the powder collection device (5) to the heating chamber cylinder (34), drive the horizontal moving trolley (1) to directly below the fluidized bed (31), and release the clamping grip (24); S2: The lifting electric push rod (19) rises vertically until the gripping clamp (24), the receiving flange (25) and the lower flange (35) are in contact. Then, the connection between the heating chamber cylinder (34) and the fluidized bed body (31) is disassembled, the gripping clamp (24) is closed and tightened, and the powder collection device (5) wraps around the fluidized bed body (31) so that the upper end of the powder collection device (5) is fixed to the fluidized bed body (31). S3: The lifting electric push rod (19) descends, removing the heating rod (33) from the fluidized bed body (31), separating the powder collection device (5) from the fluidized bed body (31), and performing the first powder collection through the discharge port (29); S4: Continue to lower the lifting electric push rod (19) until the clamping gripper (24) contacts the surface of the flipping mechanism (2) and connect and fasten the clamping gripper (24) to the flipping mechanism (2); push the transfer carriage (3) to align with the flipping mechanism (2); the flipping mechanism (2) drives the heating chamber (32) to flip, and at this time, the powder is collected for the second time through the discharge port (29); S5: After collection is complete, unzip the openable zipper (28) on the powder collection device (5) and take out the powder block in the gap of the heating rod (33).

6. The automated disassembly method for a fluidized bed heating chamber according to claim 5, characterized in that: In S1, the lifting mechanism and fixing device (4) are placed in a vertical state on the horizontal plane.

7. The automated disassembly method for a fluidized bed heating chamber according to claim 5, characterized in that: In S3, the lifting electric push rod (19) descends by 800mm.

8. The automated disassembly method for a fluidized bed heating chamber according to claim 7, characterized in that: In step S3, the heating rod (33) is removed from the fluidized bed body (31), and after standing, the powder collection device (5) is separated from the fluidized bed body (31).

9. The automated disassembly method for a fluidized bed heating chamber according to claim 5, characterized in that: In S4, the transfer carriage (3) is finely adjusted during the flipping process so that the heating chamber (32) falls into the transfer carriage (3) after completing the flipping action.

10. The automated disassembly method for a fluidized bed heating chamber according to claim 5, characterized in that: It also includes S6: transport the heating chamber (32) to the maintenance station to start the disassembly and maintenance steps. After the disassembly and maintenance are completed, reassemble in reverse order and collect the powder during the disassembly process.

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