Stirring platform for solidifying cement in radioactive waste barrel

Abstract

The invention relates to a stirring platform for solidifying cement in a radioactive waste barrel, which is characterized in that a supporting bracket is arranged on the ground in a column shape, and a lifting platform is mounted on the supporting bracket; the lifting assembly is arranged between the lifting platform and the supporting bracket, is fixedly connected with the lifting platform and is used for driving the lifting platform to move up and down along the supporting bracket; the revolution assembly is mounted on the lifting platform, the rotation assembly is mounted on the revolution assembly, the revolution assembly is used for driving the rotation assembly to revolve along the rotation radius of the revolution assembly, the lower end of the rotation assembly is connected with the stirring paddle, and the rotation assembly is used for driving the stirring paddle to rotate; the stirring paddle is located above the radioactive waste barrel and used for penetrating into the radioactive waste barrel to rotate and stir waste. Limiting is conducted through the lifting assembly, lifting motion in the vertical direction is achieved, the moving stability of the lifting platform in the vertical direction is improved, stirring is conducted through rotation and revolution at the same time, revolution is limited, and the moving stability of the revolution assembly in the rotating direction is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of radioactive waste treatment technology, and in particular to a mixing platform for cement solidification inside radioactive waste bins. Background Technology

[0002] The nuclear fuel cycle, from uranium (thorium) mining, hydrometallurgy, enrichment, fuel component manufacturing to irradiation component reprocessing, the production and application of isotopes and nuclear technologies, the decommissioning of nuclear facilities (equipment), and the operation of nuclear power plants, all generate various types of radioactive waste.

[0003] The toxicity of radioactive materials cannot be eliminated by existing chemical, physical, and biological methods; they can only decay to harmless levels according to their inherent laws. Waste solidification can prevent or limit the release of radionuclides from storage or disposal facilities into the environment. Immobilizing and encapsulating radioactive materials facilitates transportation, storage, and disposal.

[0004] The in-drum cement curing process uses a 200L steel drum as the product container. Waste, water, cement, and additives are added to the drum, and a movable propeller agitator is used for mixing. The agitator must be as close as possible to the inside of the steel drum to eliminate dead zones and improve the uniformity of the mixture.

[0005] The mixing platform in the relevant technology has low stability. During the mixing process, on the one hand, the mixing paddle may collide with the steel drum, causing deformation of the steel drum and damage to the mixing paddle. On the other hand, the fit between the paddle and the steel drum may be low, forming a mixing dead zone and affecting the uniformity of material mixing.

[0006] The above problems urgently need to be addressed. Summary of the Invention

[0007] This invention discloses a mixing platform for cement solidification in radioactive waste bins, aiming to solve the technical problems existing in the prior art.

[0008] The present invention adopts the following technical solution, comprising: a support bracket, a lifting platform, a lifting assembly, a rotation assembly, a revolution assembly, and a stirring paddle; the support bracket is a column-shaped structure set on the ground, the lifting platform is installed on the support bracket, the lifting platform is perpendicular to the support bracket and parallel to the ground; the lifting assembly is disposed between the lifting platform and the support bracket, the lifting assembly is fixedly connected to the lifting platform, and the lifting assembly is used to drive the lifting platform to move up and down along the support bracket; the revolution assembly is installed on the lifting platform, the rotation assembly is installed on the revolution assembly, the revolution assembly is used to drive the rotation assembly to revolve around the revolution assembly along the rotation radius of the revolution assembly, the lower end of the rotation assembly is connected to the stirring paddle, and the rotation assembly is used to drive the stirring paddle to rotate; the stirring paddle is located above the radioactive waste bin, and the stirring paddle is used to move downwards into the radioactive waste bin to rotate and stir the waste inside the radioactive waste bin.

[0009] Optionally, the lifting assembly includes: a hydraulic cylinder, installed on the ground, for providing lifting power; and a hydraulic cylinder bracket, vertically arranged parallel to the support bracket, with one end installed on the hydraulic cylinder and the other end connected to the lifting platform, for driving the lifting platform to move up and down.

[0010] Optionally, the lifting assembly further includes: a guide rail disposed on the support bracket and configured as a groove along the vertical direction of the support bracket, the lowest point of the guide rail being higher than the uppermost point of the radioactive waste bin; and a guide wheel assembly installed on the lifting platform, with the pulleys in the guide wheel assembly embedded in the guide rail, and the guide wheel assembly sliding up and down along the guide rail.

[0011] Optionally, the guide wheel assembly includes: a wheel assembly bracket, mounted on the lifting platform and located on the side of the lifting platform closer to the orbital component; a first wheel assembly, disposed on the wheel assembly bracket and moving up and down along the guide rail; and a second wheel assembly, mounted on the lifting platform and located on the side of the lifting platform away from the orbital component, the second wheel assembly moving up and down along the guide rail.

[0012] Optionally, the lifting platform includes a flat plate structure and a disc structure, and the revolution assembly includes a revolution disc bearing and a turntable cover plate; the flat plate structure and the disc structure are on the same horizontal plane and integrally connected, the disc structure is recessed inward to form a groove, and the revolution disc bearing is placed in the groove; the revolution disc bearing includes an inner ring and an outer ring, the inner ring is annular and fixed to the bottom plate of the groove of the disc structure, and the outer ring rotates relative to the inner ring; the turntable cover plate is placed on the revolution disc bearing and fixedly connected to the outer ring, and the diameter of the turntable cover plate is greater than or equal to the diameter of the outer ring; the bottom plate of the groove of the disc structure is provided with holes, the diameter of the holes being equal to the inner diameter of the inner ring of the bearing, and an agitator is installed at the bottom of the turntable cover plate, the agitator extending downward from the turntable cover plate, passing through the middle of the annular ring of the inner ring of the bearing and the holes in the groove bottom plate, and extending into the radioactive waste container.

[0013] Optionally, the turntable cover is disc-shaped, and the agitator is not installed at the central axis of the turntable cover.

[0014] Optionally, the revolution assembly further includes: a revolution drive wheel, disposed at the plate structure and meshing with the outer ring of the bearing; and a revolution motor, fixedly installed above the plate structure, with the output gear of the revolution motor meshing with the revolution drive wheel.

[0015] Optionally, the rotation component includes: a rotation motor mounted on the turntable cover plate; and a rotation driven wheel fixedly mounted on the shaft of the stirring paddle, meshing with the output gear of the rotation motor, for driving the stirring paddle to rotate.

[0016] The technical solution adopted in this invention can achieve at least one of the following beneficial effects: In this embodiment of the invention, by using guide pulleys and guide rails for limiting the movement of the lifting assembly, and driving it with a hydraulic cylinder, the mixing lifting platform achieves vertical lifting movement through the close contact between the guide pulleys and guide rails. This significantly improves the stability of the lifting platform's vertical movement and enhances the smoothness of the mixing platform during lifting. Similarly, by employing simultaneous rotation and revolution of dual mixing paddles, and limiting the revolution, the stability of the revolution assembly's movement in the rotational direction is significantly improved, as is the uniformity of the waste and cement mixture. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is an overall structural diagram of a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 2 This is a diagram showing the location of the radioactive waste bin in a mixing platform for cement solidification inside a radioactive waste bin, as described in this invention. Figure 3 This is a structural diagram of the guide wheel assembly in a mixing platform for cement solidification in radioactive waste bins according to the present invention; Figure 4 This is a structural diagram of a revolving component in a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 5 This is a structural diagram of a lifting platform in a mixing platform for cement solidification in a radioactive waste bin according to the present invention; Figure 6 This is a diagram showing the positional relationship between the lifting platform and the orbital component in a mixing platform for cement solidification in radioactive waste bins according to the present invention. Figure 7 This is a structural diagram of the orbital motor position in a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 8 This is a diagram showing the positional relationship between the rotating motor and the mixing paddle in a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Support bracket; 2. Lifting assembly; 21. Hydraulic cylinder; 22. Hydraulic cylinder bracket; 23. Guide rail; 24. Guide wheel set; 241. Wheel set bracket; 242. First wheel set; 243. Second wheel set; 3. Revolution assembly; 31. Revolution turntable bearing; 311. Bearing inner ring; 312. Bearing outer ring; 32. Turntable cover plate; 33. Revolution drive wheel; 34. Revolution motor; 4. Lifting platform; 41. Disc structure; 42. Flat plate structure; 5. Rotation component; 52. Rotation motor; 53. Rotation driven wheel; 6. Stirring paddle; 7. Radioactive waste bins. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0021] Obviously, the described embodiments are only some, not all, of the embodiments of the present 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.

[0022] To address the problems existing in related technologies, this application provides a mixing platform for cement solidification inside radioactive waste bins.

[0023] This embodiment provides a mixing platform for cement solidification inside radioactive waste bins, such as... Figure 1 and Figure 2 As shown, Figure 1 This is an overall structural diagram of a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 2 This is a diagram showing the location of a radioactive waste bin in a mixing platform for cement solidification within a radioactive waste bin, as described in this invention. The mixing platform includes: The system comprises a support frame 1, a lifting platform 4, a lifting assembly 2, a rotation assembly 5, a revolution assembly 3, and a stirring paddle 6. The support frame 1 is a column-shaped structure set on the ground. The lifting platform 4 is mounted on the support frame 1, perpendicular to the support frame 1 and parallel to the ground. The lifting assembly 2 is located between the lifting platform 4 and the support frame 1, and is fixedly connected to the lifting platform 4. The lifting assembly 2 is used to move the lifting platform 4 up and down along the support frame 1. The revolution assembly 3 is mounted on the lifting platform 4, and the rotation assembly 5 is mounted on the revolution assembly 3. The revolution assembly 3 is used to drive the rotation assembly 5 to revolve around the revolution assembly 3 along its radius. The lower end of the rotation assembly 5 is connected to the stirring paddle 6, which is used to drive the stirring paddle 6 to rotate. The stirring paddle 6 is located above the radioactive waste container 7 and is used to move downwards into the radioactive waste container 7 to rotate and stir the waste inside.

[0024] Optionally, the entire mixing platform is supported by a support bracket 1, which includes four columns and four crossbars. The four columns are perpendicular to the ground, and the four crossbars are set at one-third of the position of the columns. Each crossbar is fixed between two adjacent columns. The four crossbars are set in the above manner, which effectively ensures the stability of the columns.

[0025] Optionally, the radioactive waste container 7 is placed directly below the stirring paddle 6. The lifting assembly 2 moves the lifting platform 4 downward, which in turn moves the stirring paddle 6 downward. The rotation assembly 5 rotates the stirring paddle 6, and the revolution assembly 3 rotates the rotation assembly 5 and the stirring paddle 6 within the radioactive waste container 7. The rotation angle of the stirring paddle 6 can be adjusted by adjusting the revolution angle of the revolution assembly 3, so that the stirring paddle 6 rotates along the edge of the radioactive waste container 7, effectively eliminating dead zones in the stirring process.

[0026] Optionally, by limiting the lifting component 2, the space for the stirring paddle 6 to descend is limited, so it will not collide with the radioactive waste container 7. By limiting the revolution angle of the revolution component 3, the trajectory of the stirring paddle 6 during revolution is fixed, so it will not collide with the radioactive waste container 7, effectively improving the stability of the stirring movement.

[0027] In some preferred embodiments, the lifting assembly 2 includes: a hydraulic cylinder 21, installed on the ground, for providing lifting power; and a hydraulic cylinder bracket 22, vertically arranged parallel to the support bracket 1, with one end installed on the hydraulic cylinder 21 and the other end connected to the lifting platform 4, for driving the lifting platform 4 to move up and down.

[0028] Optionally, by setting up a hydraulic cylinder 21 to push the lifting platform 4 up and down, the hydraulic cylinder 21 is installed on the ground and connected to the lifting platform 4 through the hydraulic cylinder bracket 22. Pulling the lifting platform 4 down can make the stirring paddle 6 go deep into the radioactive waste container 7. By pushing the lifting platform 4 up by the hydraulic cylinder 21, the stirring paddle 6 can be moved away from the radioactive waste container 7.

[0029] In some preferred embodiments, the lifting assembly 2 further includes: a guide rail 23, which is disposed on the support bracket 1 and is configured as a groove in the vertical direction of the support bracket 1, with the lowest point of the guide rail 23 being higher than the uppermost point of the radioactive waste container 7; and a guide wheel assembly 24, which is installed on the lifting platform 4, with the pulleys in the guide wheel assembly 24 embedded in the guide rail 23, and the guide wheel assembly 24 sliding up and down along the guide rail 23.

[0030] Optionally, the guide rail 23 is set on the support bracket 1, which is equivalent to setting a groove on the support bracket 1. The guide wheel assembly 24 is placed in the guide rail 23, so that while the lifting platform 4 rises or falls, it can move smoothly downward under the action of the guide wheel assembly 24 without displacement.

[0031] In some preferred embodiments, such as Figure 3 As shown, Figure 3 This is a structural diagram of a guide wheel assembly in a mixing platform for cement solidification in a radioactive waste bin according to the present invention. The guide wheel assembly 24 includes: a wheel assembly bracket 241, which is installed on the lifting platform 4 and located on the side of the lifting platform 4 closer to the revolution component 3; a first wheel assembly 242, which is disposed on the wheel assembly bracket 241 and moves up and down along the guide rail 23; and a second wheel assembly 243, which is installed on the lifting platform 4 and located on the side of the lifting platform 4 away from the revolution component 3, and moves up and down along the guide rail 23.

[0032] Optionally, since a turntable cover plate 32 is provided at one end of the lifting platform 4 near the revolution component 3, and the turntable cover plate 32 is rotatable, the guide wheel set 24 cannot be installed on the turntable cover plate 32. Therefore, a wheel set bracket 241 needs to be extended on the lifting platform 4. That is, a bracket can be extended on the far left to install the first wheel set 242. There is no obstruction on the far right of the lifting platform 4, and the second wheel set 243 can be directly installed. The size of the second wheel set 243 and the first wheel set 242 can be set according to the size of the guide rail 23.

[0033] In some preferred embodiments, such as Figure 4 , Figure 5 and Figure 6 As shown, Figure 4 This is a structural diagram of a revolving component in a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 5This is a structural diagram of a lifting platform in a mixing platform for cement solidification inside a radioactive waste bin, according to the present invention. Figure 6 This is a diagram showing the positional relationship between a lifting platform and a rotating component in a mixing platform for cement solidification in radioactive waste bins according to the present invention. The lifting platform 4 includes a flat plate structure 42 and a disc structure 41. The rotating component 3 includes a rotating disc bearing 31 and a turntable cover plate 32. The flat plate structure 42 and the disc structure 41 are on the same horizontal plane and are integrally connected. The disc structure 41 is recessed inward to form a groove, in which the rotating disc bearing 31 is placed. The rotating disc bearing 31 includes an inner bearing ring 311 and an outer bearing ring 312. The inner bearing ring 311 is annular and fixed to the recess of the disc structure. On the bottom plate of the trough, the outer ring 312 of the bearing rotates relative to the inner ring 311 of the bearing; the turntable cover plate 32 is placed on the revolution disc bearing 31 and is fixedly connected to the outer ring 312 of the bearing, and the diameter of the turntable cover plate 32 is greater than or equal to the diameter of the outer ring 312 of the bearing; the groove bottom plate of the disc structure 41 is provided with holes, the diameter of which is equal to the inner diameter of the inner ring 311 of the bearing; the bottom of the turntable cover plate 32 is equipped with a stirring paddle 6, which extends downward from the turntable cover plate 32, passes through the middle of the ring of the inner ring 311 of the bearing and the holes on the groove bottom plate, and extends into the radioactive waste container 7.

[0034] Optionally, the revolution disc bearing 31 is a four-point contact ball disc bearing. This revolution disc bearing 31 is an external gear bearing. The inner ring 311 of the bearing is fixedly mounted on the bottom plate of the groove in the disc structure 41, that is, the revolution disc bearing 31 is supported by the disc structure 41, and the inner ring 311 is fixed on the disc structure 41. The outer ring 312 of the bearing can rotate relative to it, and the upper end of the outer ring 312 is fixedly connected to the turntable cover plate 32. Rotating the outer ring 312 can drive the turntable cover plate 32 to rotate, and the stirring paddle 6 is installed in the middle position of the turntable cover plate 32 (the middle position of the annular inner ring 311). During the rotation of the turntable cover plate 32, the stirring paddle 6 can revolve around the turntable cover plate 32, that is, the stirring paddle 6 can rotate along the inner wall of the radioactive waste container 7, effectively reducing the dead angle of stirring. By limiting the movement of the turntable cover plate 32, the stirring paddle 6 can rotate along a predetermined trajectory, avoiding the stirring paddle 6 from hitting the radioactive waste container 7.

[0035] In some preferred embodiments, the turntable cover plate 32 is disc-shaped, and the installation position of the agitator 6 is not located at the central axis of the turntable cover plate 32.

[0036] Optionally, the agitator 6 needs to be installed outside the central axis of the turntable cover plate 32. That is, when the agitator 6 is placed on the central axis, it cannot revolve. It can only rotate with a radius of distance from the agitator 6 to the central axis outside the central axis. It should be noted that the closer the agitator 6 is installed to the central axis, the smaller the revolution diameter. The distance between the agitator 6 and the central axis can be adjusted to accommodate radioactive waste containers 7 of different diameters.

[0037] Optionally, multiple agitators 6 can be used for mixing. Multiple mounting holes for agitators 6 are provided on the turntable cover plate 32. By installing multiple agitators 6 according to the mounting holes, mixing can be faster.

[0038] In some preferred embodiments, such as Figure 7 As shown, Figure 7 This is a structural diagram of the position of the revolution motor in a mixing platform for cement solidification in a radioactive waste bin according to the present invention. The revolution component 3 also includes: a revolution drive wheel 33, which is disposed at the plate structure 42 and meshes with the outer ring 312 of the bearing; and a revolution motor 34, which is fixedly installed above the plate structure 42, and the output gear of the revolution motor 34 meshes with the revolution drive wheel 33.

[0039] Optionally, the revolution drive wheel 33 is located on one side of the bearing outer ring 312 and meshes with it. When the revolution drive wheel 33 rotates, it drives the bearing outer ring 312 to rotate, thereby driving the turntable cover plate 32 and the agitator 6 to rotate. The revolution drive wheel 33 is driven by the revolution motor 34. Multiple revolution drive wheels 33 can be set according to the distance between the revolution motor 34 and the bearing outer ring 312, so that the revolution motor 34 can indirectly drive the bearing outer ring 312.

[0040] Optionally, the orbital drive wheel 33 is placed horizontally, so its output shaft is vertical. The orbital motor 34 is also placed horizontally, so its output shaft is horizontal. In this case, the output shafts of the orbital drive wheel 33 and the orbital motor 34 are perpendicular to each other. Therefore, a conical wheel is needed for meshing to convert the lateral rotational force into a longitudinal rotational force. Placing the orbital motor 34 horizontally allows for minimizing the space above it, thus reducing the height of the column in the support bracket 1.

[0041] Optionally, to prevent accidental contact and injury to personnel during the rotation of the output shaft of the revolution motor 34, the output shaft of the revolution motor 34 and the output shaft of the revolution drive wheel 33 can be covered by a revolution wheel cover to cover the conical wheel, effectively preventing personnel injury.

[0042] In some preferred embodiments, such as Figure 8 As shown, Figure 8 This is a diagram showing the positional relationship between the self-rotating motor and the stirring paddle in a mixing platform for cement solidification in a radioactive waste bin according to the present invention. The self-rotating component 5 includes: a self-rotating motor 52, which is installed on the turntable cover plate 32; and a self-rotating driven wheel 53, which is fixedly installed on the shaft of the stirring paddle 6 and meshes with the output gear of the self-rotating motor 52 to drive the stirring paddle 6 to rotate.

[0043] Optionally, a self-rotating driven wheel 53 is provided at the upper end of the stirring paddle 6. The self-rotating driven wheels 53 of multiple stirring paddles 6 are all meshed with each other, that is, when one stirring paddle 6 rotates, the other stirring paddles 6 will rotate synchronously. The self-rotating driven wheel 53 of any stirring paddle 6 is meshed with the output gear of the self-rotating motor 52, and the self-rotating motor 52 drives the self-rotating driven wheel 53, thereby driving the stirring paddle 6 to rotate.

[0044] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A mixing platform for cementation of radioactive waste in a waste barrel, characterized in that, include: Support bracket (1), lifting platform (4), lifting assembly (2), rotation assembly (5), revolution assembly (3) and stirring paddle (6); The support bracket (1) is set on the ground in the shape of a column, and the lifting platform (4) is installed on the support bracket (1). The lifting platform (4) is perpendicular to the support bracket (1) and parallel to the ground. The lifting assembly (2) is disposed between the lifting platform (4) and the support bracket (1). The lifting assembly (2) is fixedly connected to the lifting platform (4). The lifting assembly (2) is used to drive the lifting platform (4) to move up and down along the support bracket (1). The revolution component (3) is installed on the lifting platform (4), and the rotation component (5) is installed on the revolution component (3). The revolution component (3) is used to drive the rotation component (5) to revolve around the revolution component (3) along the rotation radius of the revolution component (3). The lower end of the rotation component (5) is connected to the stirring paddle (6), and the rotation component (5) is used to drive the stirring paddle (6) to rotate. The stirring paddle (6) is located above the radioactive waste container (7). The stirring paddle (6) is used to move downwards and penetrate into the radioactive waste container (7) to rotate and stir the waste inside the radioactive waste container (7).

2. A mixing platform for cementation of radioactive waste in a waste barrel according to claim 1, characterized in that The lifting assembly (2) includes: Hydraulic cylinder (21), installed on the ground, is used to provide lifting power; The hydraulic cylinder bracket (22) is vertically arranged parallel to the support bracket (1), with one end installed on the hydraulic cylinder (21) and the other end connected to the lifting platform (4) to drive the lifting platform (4) to move up and down.

3. A mixing platform for cementation of radioactive waste in a waste barrel according to claim 1, characterized in that, The lifting assembly (2) also includes: The guide rail (23) is set on the support bracket (1) and is set in a groove shape along the vertical direction of the support bracket (1). The lowest point of the guide rail (23) is higher than the uppermost point of the radioactive waste container (7). The guide wheel assembly (24) is installed on the lifting platform (4), and the pulleys in the guide wheel assembly (24) are embedded in the guide rail (23). The guide wheel assembly (24) slides up and down along the guide rail (23).

4. A mixing platform for cement solidification inside a radioactive waste bin according to claim 3, characterized in that, The guide wheel assembly (24) includes: The wheel assembly bracket (241) is installed on the lifting platform (4) and is located on the side of the lifting platform (4) closer to the revolution assembly (3); The first wheel assembly (242) is mounted on the wheel assembly bracket (241) and moves up and down along the guide rail (23); The second wheel assembly (243) is installed on the lifting platform (4) and located on the side of the lifting platform (4) away from the revolution component (3). The second wheel assembly (243) moves up and down along the guide rail (23).

5. A mixing platform for cement solidification inside a radioactive waste bin according to claim 1, characterized in that, The lifting platform (4) includes a flat plate structure (42) and a disc structure (41), and the revolution assembly (3) includes a revolution disc bearing (31) and a turntable cover plate (32). The flat plate structure (42) and the disk structure (41) are on the same horizontal plane and are integrally connected. The disk structure (41) is recessed inward to form a groove, and a rotating disk bearing (31) is placed in the groove. The revolution disc bearing (31) includes an inner ring (311) and an outer ring (312). The inner ring (311) is annular and fixed to the bottom plate of the disc structure groove. The outer ring (312) rotates relative to the inner ring (311). The turntable cover plate (32) is placed on the revolution disc bearing (31) and is fixedly connected to the outer ring (312) of the bearing. The diameter of the turntable cover plate (32) is greater than or equal to the diameter of the outer ring (312) of the bearing. The disc structure (41) has holes on its grooved bottom plate. The diameter of the holes is equal to the inner diameter of the bearing inner ring (311). A stirring paddle (6) is installed at the bottom of the turntable cover plate (32). The stirring paddle (6) extends downward from the turntable cover plate (32), passes through the middle of the ring of the bearing inner ring (311) and the holes on the grooved bottom plate, and extends into the radioactive waste container (7).

6. A mixing platform for cement solidification inside a radioactive waste bin according to claim 5, characterized in that, The turntable cover plate (32) is disc-shaped, and the installation position of the stirring paddle (6) is not at the central axis of the turntable cover plate (32).

7. A mixing platform for cement solidification inside a radioactive waste bin according to claim 5, characterized in that, The orbital component (3) also includes: The orbital drive wheel (33) is located at the flat plate structure (42) and meshes with the outer ring (312) of the bearing; The orbital motor (34) is fixedly installed above the flat plate structure (42), and the output gear of the orbital motor (34) meshes with the orbital drive wheel (33).

8. A mixing platform for cement solidification inside a radioactive waste bin according to claim 5, characterized in that, The self-rotating component (5) includes: The self-rotating motor (52) is mounted on the turntable cover plate (32); The self-rotating driven wheel (53) is fixedly installed on the shaft of the stirring paddle (6) and meshes with the output gear of the self-rotating motor (52) to drive the stirring paddle (6) to rotate.

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