Nuclear waste package rotation driving device

Abstract

The utility model provides a nuclear waste cargo package rotation driving device, and relates to the technical field of radioactive activity detection equipment, the nuclear waste cargo package rotation driving device comprises a support body, a rotation driving part, a turntable, a positioning structure and a rotation supporting mechanism, the rotation driving part is vertically and fixedly arranged in the support body, and is provided with a power output end extending axially; the turntable is rotationally connected to the bracket body and is coaxially and fixedly connected with the power output end; the positioning structure is fixedly arranged on the turntable and is coaxial with the turntable and the rotary driving piece; the rotary supporting mechanisms are vertically and fixedly arranged in the support body and evenly distributed on the periphery of the rotary driving part in the circumferential direction, and the tops of the rotary supporting mechanisms rotationally abut against the bottom of the rotary disc. The device is simple in structure, low in manufacturing cost, high in transmission efficiency and load transmission efficiency, good in axial supporting effect on the rotating disc and the nuclear waste cargo bag, low in failure rate, high in operation stability and use reliability, convenient to disassemble and assemble and beneficial to later maintenance treatment, and the later use cost of a user is reduced.

Description

Technical Field

[0001] This application relates to the technical field of radioactivity detection, and particularly to a nuclear waste package rotary drive device applied to radioactivity detection equipment. Background Art

[0002] During the operation, maintenance and disposal of nuclear power plant nuclear power units, some radioactive nuclear wastes will be generated, such as waste resin, waste filter elements, chemical waste liquid, etc. These nuclear wastes are generally treated by processes such as cement solidification, hot compaction or filling HIC dehydration, and stored in 200L or 400L waste barrels or HIC containers and stored in the form of nuclear waste packages. With the continuous operation of nuclear power plants, the amount of nuclear waste packages generated is also increasing. According to national standard requirements, after the nuclear waste packages are formed, radioactivity detection needs to be carried out to confirm the effectiveness of the functions of radioactive nuclear waste disposal facilities through monitoring and inspection, and ensure the safety of radioactive nuclear waste disposal facilities.

[0003] At present, nuclear power plants mainly use radioactivity measurement equipment to detect the radioactivity of nuclear waste packages. Such equipment drives the nuclear waste packages to rotate at multiple angles through a rotary drive device, and uses a matching detection probe to detect each angular area of the package one by one to avoid detection result deviations caused by uneven distribution of radioactive substances in the package. Existing nuclear waste package rotary drive devices used in radioactivity detection equipment basically use a large-sized gear ring as the transmission main body of the turntable, establish the transmission connection between the turntable and the drive motor through externally meshing planetary gears, and then use a large-sized bearing mechanism around the gear ring to bear various torques such as radial and axial torques of the device. However, the structures of the large-sized planetary gear mechanism and bearing mechanism are relatively complex, the manufacturing cost is relatively high, and there are problems such as inconvenient disassembly and assembly, high difficulty in later maintenance and disposal, long construction period and high disposal cost. Summary of the Utility Model

[0004] In order to solve the above technical problems, this application provides a nuclear waste package rotary drive device applied to radioactivity detection equipment, which solves the technical problems of the existing device such as complex structure, inconvenient disassembly and assembly, high manufacturing cost and high cost of later maintenance and disposal, and large disposal difficulty. The nuclear waste package rotary drive device provided by this application has a simple structure, low manufacturing cost, high transmission efficiency and load transfer efficiency, good axial support effect on the turntable and nuclear waste package, low failure rate, high operation stability and use reliability, and is convenient for disassembly and assembly, which is beneficial to later maintenance and disposal, and reduces the later use cost of users.

[0005] The technical solution adopted by this application to solve its technical problems is: to provide a nuclear waste package rotary drive device, the device includes a support body and the following provided on the support body:

[0006] A rotation driving member, which is vertically fixed in the support body and has a power output end extending axially;

[0007] A turntable, which is rotatably connected to the support body and is coaxially fixedly connected to the power output end to rotate under the direct drive of the rotation driving member;

[0008] A positioning structure, which is fixed on the turntable and is coaxial with the turntable and the rotation driving member to position and limit the nuclear waste package;

[0009] A rotation support mechanism, which is vertically fixed in the support body and is circumferentially and evenly distributed around the rotation driving member, and the top of the rotation support mechanism rotatably abuts against the bottom of the turntable to transmit the axial load from the turntable and the nuclear waste package to the support body.

[0010] In some embodiments, the rotation support mechanism includes:

[0011] At least three support seats, which are vertically fixedly connected in the support body and are evenly distributed around the rotation driving member;

[0012] At least three rollers, which are rotatably connected to the tops of the corresponding support seats and at least partially rotatably abut against the turntable.

[0013] In some embodiments, the rotation support mechanism further includes an annular guide rail, which is coaxially fixedly connected to the bottom of the turntable and movably presses against the rollers to guide the turntable to rotate around the rotation support mechanism.

[0014] In some embodiments, the device further includes a supporting mechanism, which is fixed in the support body and at least partially coaxially located between the turntable and the rotation driving member;

[0015] A turntable shaft is axially provided at the bottom of the turntable, and at least part of the turntable shaft is movably inserted and axially limited in the supporting mechanism, and the turntable shaft is coaxially fixedly connected to the power output end through the supporting mechanism to transmit the output torque of the rotation driving member to the turntable.

[0016] In some embodiments, the supporting mechanism includes:

[0017] At least three supporting columns, which are vertically fixed in the support body and are evenly distributed between the rotation driving member and the rotation support mechanism;

[0018] A support base, which is horizontally and fixedly connected to the support column and coaxially located between the turntable and the power output end. An axial coupling hole is provided through the support base.

[0019] The lower part of the turntable shaft is rotatably inserted into the coupling hole and is coaxially and fixedly connected to the power output end.

[0020] In some embodiments, the support mechanism further includes a bearing assembly, which is correspondingly arranged between the upper and lower ends of the coupling hole and the turntable shaft.

[0021] In some embodiments, the bearing assembly includes:

[0022] A thrust bearing, which is arranged between the upper end of the coupling hole and the turntable shaft;

[0023] A radial bearing, which is arranged between the lower end of the coupling hole and the turntable shaft.

[0024] In some embodiments, an installation groove for positioning and installing the rotary drive member is provided on the bottom surface of the support body 1. An inspection opening is provided at the center of the installation groove, and at least part of the bottom of the rotary drive member is exposed outside the inspection opening.

[0025] In some embodiments, the rotary drive member is a servo motor or a stepper motor; the device further includes a control module, which is electrically connected to the rotary drive member to control the rotation angle and speed of the turntable.

[0026] In some embodiments, the device further includes a weighing module, which is arranged between the support body and the support surface supporting the support body and is electrically connected to the control module to measure the weight of the nuclear waste package.

[0027] The beneficial effect of the present application is that the nuclear waste package rotary drive device provided by the present application is applied to a radioactive activity detection device. The turntable is directly driven by the rotary drive member to rotate relative to the support body, and the nuclear waste package is positioned and restricted by the positioning structure. The top of the rotary support mechanism rotates and abuts against the turntable, so that under the direct drive of the rotary drive member, the nuclear waste package is driven to rotate at multiple angles through the turntable and the positioning structure, and the axial load from the turntable and the nuclear waste package is directly transmitted to the support body through the rotary support mechanism, and then the detection probe is cooperated to conduct radioactive activity detection on each angular area of the nuclear waste package one by one.

[0028] The device of the present application abandons the structural design of the existing large-sized planetary gear mechanism. The rotating driving member directly drives the rotating disc to rotate, simplifying the transmission structure, reducing the manufacturing cost of the device, and being more convenient for disassembly and assembly compared with the large-sized planetary gear mechanism, facilitating later maintenance and disposal, improving the maintenance and disposal efficiency, and reducing the maintenance and disposal cost. At the same time, the direct drive form of the rotating driving member also improves the rotating drive efficiency and the rotation angle control accuracy of the device of the present application for the nuclear waste package. In addition, the device of the present application abandons the structural design of the existing large-sized bearing mechanism. The rotating support mechanism directly transmits the axial loads from the rotating disc and the nuclear waste package to the support body, eliminating the large-sized bearing mechanism, reducing the manufacturing cost of the device, and being more convenient for disassembly and assembly compared with the large-sized bearing mechanism, facilitating later maintenance and disposal, further improving the maintenance and disposal efficiency, and reducing the maintenance and disposal cost. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0030] Figure 1 is a combined state structural schematic diagram of a certain embodiment of the device of the present application for rotating and driving a nuclear waste package;

[0031] Figure 2 is an overall structural schematic diagram of a certain embodiment of the device of the present application;

[0032] Figure 3 is a structural decomposition schematic diagram of a certain embodiment of the device of the present application;

[0033] Figure 4 is a cross-sectional structural schematic diagram of a certain embodiment of the device of the present application in a vertical plane;

[0034] Figure 5 is a structural schematic diagram of the rotating disc of a certain embodiment of the device of the present application;

[0035] Figure 6 is a truncated structural schematic diagram of the annular guide rail of a certain embodiment of the device of the present application in a vertical plane;

[0036] Figure 7 is a truncated structural schematic diagram of the support seat of a certain embodiment of the device of the present application in a vertical plane.

[0037] In the figure: 100. Nuclear waste package, 1. Bracket body, 11. Fixed plate, 111. Installation groove, 112. Maintenance opening, 113. Support seat positioning groove, 114. Support column fixing hole, 12. Protection housing, 121. Turntable opening, 13. First threaded fastener, 14. Second threaded fastener, 15. Support column fastening nut, 16. Support seat fastening nut, 17. Third threaded fastener, 2. Rotation driving member, 21. Power output end, 22. Fixed edge, 221. Driving member fixing hole, 3. Turntable, 31. Guide rail positioning groove, 32. Guide rail fixing hole A, 33. Turntable shaft, 331. Shaft main body, 332. Coupling part, 333. Stop step, 4. Positioning structure, 41. Centering bracket, 42. Support leg, 5. Rotation support mechanism, 51. Support seat, 511. Installation groove opening, 52. Roller, 53. Roller shaft, 54. Annular guide rail, 541. Guide rail top plate, 542. Guide rail bottom plate, 543. Guide rail fixing part, 544. Guide rail fixing hole B, 6. Support mechanism, 61. Support column, 611. Support column main body, 612. Upper connection stud, 613. Lower connection stud, 62. Support seat, 621. Coupling hole, 622. First bearing groove, 623. Second bearing groove, 624. Support seat fixing hole, 63. Thrust bearing, 64. Radial bearing, 7. Weighing module, 10. Central axis. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. According to the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] Please refer to Figures 1 to 4, this application provides a nuclear waste package rotary drive device applied to a radioactive activity detection device. The device includes a support body 1, a rotary drive member 2, a turntable 3, a positioning structure 4, and a rotary support mechanism 5 provided on the support body 1. Among them, the rotary drive member 2 is vertically fixedly connected inside the support body 1, and the rotary drive member 2 has a power output end 21 extending axially. Preferably, the power output end 21 is on the same central axis 10 as the support body 1. The main body of the turntable 3 is a horizontally arranged disc-shaped structure, rotatably connected to the support body 1, and the turntable 3 is fixedly connected coaxially with the power output end 21 of the rotary drive member 2 to horizontally rotate relative to the support body 1 under the direct drive of the rotary drive member 2. The positioning structure 4 is fixedly connected to the turntable 3 and is coaxial with the turntable 3 and the rotary drive member 2 to position and limit the nuclear waste package 100. The rotary support mechanism 5 is vertically fixedly connected in the support body 1 and is circumferentially and evenly distributed around the rotary drive member 2, and the top of the rotary support mechanism 5 rotatably abuts against the bottom surface of the turntable 3 to transmit the axial load from the turntable 3 and the nuclear waste package 100 to the support body 1.

[0040] In actual use, the nuclear waste package 100 is positioned and restricted on the turntable 3 by the positioning structure 4. The rotary drive member 2 directly outputs torque to the turntable 3 through its power output end 21 to drive the turntable 3 to drive the nuclear waste package 100 to rotate at multiple angles, and then cooperate with the detection probe (not shown in the figure) provided outside or inside the support body 1 to perform radioactive activity detection on each angular region of the nuclear waste package 100 one by one, avoiding the detection result deviation caused by the non-uniform distribution of radioactive substances.

[0041] Since the top of the rotary support mechanism 5 rotatably abuts against the bottom of the turntable 3, during the rotation of the turntable 3 of the device of this application relative to the support body 1, the axial load from the turntable 3 and the nuclear waste package 100 can be directly transmitted to the support body 1 through the rotary support mechanism 5 to prevent the rotary drive member 2 from being damaged due to excessive axial load.

[0042] The device of this application abandons the structural design of the existing large-size planetary gear mechanism. The turntable 3 is directly driven by the rotary drive member 2, which simplifies the transmission structure, reduces the manufacturing cost of the device, and is more convenient for disassembly and assembly than the large-size planetary gear mechanism, facilitating later maintenance and disposal, improving the maintenance and disposal efficiency, and reducing the maintenance and disposal cost. Moreover, the direct drive form of the rotary drive member 2 also avoids the adverse effects brought by the gear wear of the transmission structure, and can significantly improve the rotary drive efficiency and the rotation angle control accuracy of the device of this application for the nuclear waste package 100.

[0043] Meanwhile, the device of the present application abandons the structural design of the existing large-size bearing mechanism. The axial loads from the turntable 3 and the nuclear waste package 100 are directly transmitted to the support body 1 through the rotary support mechanism 5, eliminating the large-size bearing mechanism, reducing the manufacturing cost of the device, avoiding the rotary driving member 2 from bearing the axial load, and without affecting the rotation of the turntable 3 relative to the support body 1, ensuring the stable and high-precision operation of the rotary driving member 2. Moreover, the rotary support mechanism 5 has a better axial support effect on the turntable 3 and the nuclear waste package 100, and can be applied to the rotary driving of nuclear waste packages 100 with a greater weight.

[0044] In addition, compared with the structural design in the existing design where the turntable is rotationally connected to the transmission structure through a large-size bearing mechanism, the turntable 3 of the device of the present application is substantially in movable abutment with the rotary support mechanism 5, which is more convenient for disassembly and assembly, conducive to later maintenance and disposal, further improving the maintenance and disposal efficiency and reducing the maintenance and disposal cost.

[0045] Please refer to Figures 2 to 4 , in a specific embodiment, the support body 1 includes a fixed plate 11 and a protective housing 12. The fixed plate 11 is horizontally arranged and plays a role of bottom support. Preferably, it is made of thick steel plates to ensure the overall structural strength of the fixed plate 11. The protective housing 12 is preferably a hollow housing structure formed by welding multiple steel plates, located on the fixed plate 11 and detachably fixedly connected to the fixed plate 11 through fasteners (not shown in the figure) for later maintenance and disposal.

[0046] The support body 1 of the device of the present application adopts a split structure design, which is convenient for disassembly and assembly, conducive to later maintenance and disposal, and has a high overall structural strength, ensuring the stable support for each component of the device and the nuclear waste package 100.

[0047] Please refer to Figure 3 , preferably, an installation groove 111 for positioning and installing the rotary driving member 2 is provided in the middle of the bottom surface of the fixed plate 11. An inspection opening 112 passing through the center axis 10 axially is opened at the center of the installation groove 111, and the diameter of the inspection opening 112 is smaller than the bottom outer diameter of the rotary driving member 2. After the rotary driving member 2 is vertically positioned and installed on the installation groove 111, at least a part of the bottom of the rotary driving member 2 is exposed outside the inspection opening 112.

[0048] The inspection opening 112 provided on the support body 1 of the device of the present application facilitates the operator to perform maintenance on the rotary driving member 2 from the bottom, which is conducive to later maintenance and disposal. Moreover, the corresponding cable (not shown in the figure) of the rotary driving member 2 can also be electrically connected to external equipment through the inspection opening 112, facilitating wiring. In addition, the provided inspection opening 112 is also conducive to the heat dissipation of the rotary driving member 2, which can avoid the failure caused by overheating during the operation of the rotary driving member 2, ensuring the normal operation of the rotary driving member 2.

[0049] Please refer to Figures 2 to 3 , preferably, a turntable opening 121 passing through the central axis 10 is provided on the top surface of the protective housing 12 for exposing the turntable 3. The inner diameter of the turntable opening 121 is slightly larger than the outer diameter of the turntable 3 to limit the size of the gap between the turntable 3 and the turntable opening 121, preventing external objects from entering the protective housing 12 through the gap there.

[0050] Please refer to Figures 3 to 4 , in a specific embodiment, the rotary support mechanism 5 of the device of the present application includes at least three support seats 51 and at least three rollers 52. In this embodiment, eight support seats 51 and eight rollers 52 are taken as examples for illustration, that is, one roller 52 is rotatably connected to each support seat 51 correspondingly.

[0051] The eight support seats 51 are vertically positioned and assembled on the fixing plate 11 of the bracket body 1 with the central axis 10 as the center and are circumferentially and evenly distributed around the rotary drive member 2. And an installation slot opening 511 facing the turntable 3 is provided at the top of each support seat 51. The rollers 52 are respectively rotatably connected to the installation slot openings 511 at the tops of the corresponding support seats 51, and at least part of the rollers 52 rotatably abut against the bottom end surface of the turntable 3.

[0052] , preferably, the roller 52 in this embodiment is a circular roller structure and is rotatably connected to the installation slot opening 511 at the top of the corresponding support seat 51 through a roller shaft 53 passing through its axis. And the axis of each roller shaft 53 is arranged along the radial direction of the turntable 3, so that at least one roller 52 is rotatably connected to the top of each support seat 51, and at least part of the roller 52 rotatably abuts against the bottom end surface of the turntable 3 along the tangential direction. In this way, it can be ensured that the turntable 3 can rotate and press on each roller 52 and rotate around the central axis 10 under the guidance of the roller 52.

[0053] It should be noted that the tops of the rollers 52 should be on the same horizontal plane after installation to ensure that the turntable 3 can be located on the rotary support mechanism 5 in a horizontal posture. After installation, the eight rollers 52 together form a circular guiding path around the periphery of the rotary drive member 2 and coaxial with the turntable 3. In this way, during the rotation of the turntable 3 relative to the bracket body 1 under the drive of the rotary drive member 2, each roller 52 can not only support the turntable 3 and prevent the turntable 3 from tilting and deflecting, but also play a guiding role in guiding the turntable 3 to rotate horizontally around the central axis 10. Moreover, under the support and guiding effects of the rotary support mechanism 5, the axial loads from the turntable 3 and the nuclear waste package 100 can be directly transmitted to the bracket body 1 through the rollers 52, roller shafts 53 and support seats 51, avoiding the power output end 21 of the rotary drive member 2 from directly bearing the axial load and malfunctioning, and ensuring the stable and high-precision operation of the rotary drive member 2.

[0054] Preferably, each roller 52 is rotatably connected to the corresponding roller shaft 53 through a roller bearing (not shown) to ensure that the roller 52 can rotate flexibly relative to the roller shaft 53. Moreover, the setting of the roller bearing can also reduce the wear between the roller 52 and the turntable 3 and the wear between the roller shaft 53 and the mounting notch 511, thereby improving the use reliability and service life of the roller 52.

[0055] The rotary support mechanism 5 of the device of the present application rotates and abuts against the turntable 3 through the rollers 52 rotatably connected to the tops of the respective support seats 51. When the turntable 3 rotates under the drive of the rotary drive member 2, the bottom surface of the turntable 3 can directly act on each roller 52, and under the guiding rotation of each roller 52, it horizontally rotates around the circular guiding path with the central axis 10 as the rotation center, playing a role in axially supporting and rotationally guiding the turntable 3 and the nuclear waste package 100, ensuring that the turntable 3 can rotate horizontally and stably, sharing the axial load of the device, and ensuring the stable and high-precision operation of the rotary drive member 2. In addition, the structure of the rotary support mechanism 5 of the device of the present application is simple, the manufacturing cost is lower than that of the large-size bearing mechanism, and the disassembly and assembly are convenient, which is conducive to later maintenance and disposal.

[0056] Please refer to Figures 3 to 4 As a preference, eight support seat positioning grooves 113 for positioning and installing the respective support seats 51 are provided on the fixing plate 11 of the support body 1. The eight support seat positioning grooves 113 are circumferentially and uniformly distributed around the installation groove 111 with the central axis 10 as the center. During actual installation, the bottoms of the respective support seats 51 are respectively positioned in the corresponding support seat positioning grooves 113 and fixedly connected to the fixing plate 11 through the first threaded fasteners 13. In this way, the adjustment step of the deflection angle of each support seat 51 is omitted, which is convenient for the positioning and assembly of the support seat 51 and the fixing plate 11, conducive to the later maintenance and replacement of the support seat 51, and also ensures that the rollers 52 at the tops of the respective support seats 51 can rotate and abut against the turntable 3 in the tangential direction.

[0057] It should be noted that in some other embodiments, the number of the support seats 51 of the rotary support mechanism 5 can be three, or can be between three and eight, or can also be more than eight. The number of the rollers 52 rotatably connected to the tops of the respective support seats 51 can also be two or more, as long as the turntable 3 can be stably supported and the turntable 3 can be guided to rotate around the rotary support mechanism 5. The present application does not make any limitation in this regard.

[0058] In addition, it should be noted that in some other embodiments, the roller 52 can also be a spherical roller structure, which is rotatably connected to the mounting notch 511 at the top of the support seat 51 through a ball seat. In this way, the roller shaft 53 structure can be omitted and the direction correction is not required, and the self-adaptive adjustment of the guiding direction of the roller 52 can be realized.

[0059] Please refer to Figures 3 to 4, in a specific embodiment, the rotary support mechanism 5 further includes an annular guide rail 54. The annular guide rail 54 is coaxially and fixedly connected to the bottom of the turntable 3 and is movably pressed against the roller 52 to guide the turntable 3 to rotate around the rotary support mechanism 5.

[0060] Please refer to Figures 4 to 5 , preferably, a concentric circular guide rail positioning groove 31 is provided at the peripheral edge of the bottom of the turntable 3. During actual assembly, the annular guide rail 54 is positioned at the bottom of the turntable 3 through the guide rail positioning groove 31 and is coaxially and fixedly connected to the turntable 3 through the second threaded fastener 14.

[0061] For the rotary support mechanism 5 of the device of the present application, its annular guide rail 54 plays a role in strengthening and supporting the structure of the turntable 3, enabling the turntable 3 to carry nuclear waste packages 100 of greater weight. At the same time, the provided annular guide rail 54 also avoids the roller 52 directly rotating and pressing against the turntable 3, preventing the bottom surface of the turntable 3 from being worn and pitted due to friction loss after long-term use. In addition, the annular guide rail 54 and the turntable 3 are essentially a split structure design, and can be conveniently disassembled, assembled and replaced by disassembling and assembling the second threaded fastener 14. Moreover, the setting of the guide rail positioning groove 31 is also beneficial for quickly centering and correcting the annular guide rail 54 and fixing the assembly, which can improve the maintenance and disposal efficiency and reduce the maintenance and disposal cost.

[0062] Please refer to Figures 5 to 6 , preferably, the annular guide rail 54 includes a guide rail top plate 541 and a guide rail bottom plate 542 that are horizontally arranged corresponding to each other and have a circular ring structure, and a guide rail fixing part 543 that is in a cylindrical shape and is coaxially and fixedly connected between the guide rail top plate 541 and the guide rail bottom plate 542, so that the vertical cross-section of the annular guide rail 54 forms an I-shaped structure. In this way, the annular guide rail 54 has excellent structural strength and capabilities such as compression resistance, tensile resistance, torsion resistance, and shear resistance, which can significantly improve the ability of the annular guide rail 54 to bear loads in all directions, thereby preventing problems such as deformation and inequality of the annular guide rail 54 after use, significantly improving the use reliability and service life of the annular guide rail 54, and ensuring the horizontal and stable rotation of the turntable 3.

[0063] Preferably, a plurality of circularly arranged guide rail fixing holes B544 are vertically penetrated and evenly distributed on the guide rail top plate 541, and the guide rail fixing holes B544 are close to the outer peripheral edge of the guide rail top plate 541 and are relatively located outside the guide rail fixing part 543. Correspondingly, a plurality of guide rail fixing holes A32 corresponding to the guide rail fixing holes B544 one by one are vertically penetrated and evenly distributed on the guide rail positioning groove 31 of the turntable 3.

[0064] During actual installation, the guide rail top plate 541 of the annular guide rail 54 is aligned and embedded in the guide rail positioning groove 31, and the guide rail fixing hole A32 and the guide rail fixing hole B544 are adjusted by rotation so as to correspond one by one up and down, and then the annular guide rail 54 is coaxially fixedly connected to the bottom of the turntable 3 through the guide rail fixing hole A32 and the guide rail fixing hole B544 by the second threaded fastener 14, and after fixing, the second threaded fastener 14 is at least partially exposed in the outer opening area between the guide rail top plate 541 and the guide rail top plate 541 of the annular guide rail 54. This makes it easy for operators to disassemble and assemble the second threaded fastener 14 from the outside using tools such as a wrench, which is convenient for later maintenance and disposal.

[0065] See also Figures 3 to 5 In a specific embodiment, the device of the present application further includes a support mechanism 6, which is fixedly arranged in the bracket body 1 and at least partially coaxially arranged between the turntable 3 and the rotary drive member 2. A turntable shaft 33 extending axially downward is provided at the bottom center of the turntable 3, and the lower part of the turntable shaft 33 is at least partially movably plugged and axially limited on the support mechanism 6, and the turntable shaft 33 is coaxially fixedly connected with the power output end 21 of the rotary drive member 2 through the support mechanism 6, so as to transmit the output torque of the rotary drive member 2 to the turntable 3 through the turntable shaft 33.

[0066] The device of the present application realizes the coaxial fixed connection between the turntable shaft 33 of the turntable 3 and the power output end 21 of the rotary drive member 2 through the support mechanism 6, so that the turntable shaft 33 and the turntable 3 can rotate around the central axis 10 compared with the support mechanism 6, while preventing the turntable shaft 33 and the turntable 3 from moving in the axial direction compared with the support mechanism 6. In this way, the axial load from the turntable 3 and the nuclear waste cargo package 100 can be further shared by the support mechanism 6, ensuring the stable and high-precision operation of the rotary drive device and the horizontal stable rotation of the turntable 3.

[0067] See also Figure 3 , Figure 4 and Figure 7 In a specific embodiment, the support mechanism 6 includes at least three support columns 61, which are vertically fixedly connected to the bracket body 1 and evenly distributed between the periphery of the rotary drive member 2 and the rotary support mechanism 5. A support seat 62 with a coaxial line between the turntable 3 and the power output end 21 of the rotary drive member 2 is horizontally fixedly installed on the top of the support column 61, and a connecting hole 621 is axially penetrated at the center of the support seat 62. The lower part of the turntable shaft 33 is axially rotated and inserted into the connecting hole 621, and is coaxially fixedly connected to the power output end 21 of the rotary drive member 2 through the connecting hole 621.

[0068] The function of the support columns 61 is to support and fix the support seat 62. The more the number of support columns 61, the better the support and fixation effect on the support seat 62. In this embodiment, twelve support columns 61 are taken as an example for illustration. Of course, in some other embodiments, the minimum number of support columns 61 can be three, or more than three and less than twelve, or more than twelve. This application does not limit this, as long as it can form stable support and fixation for the support seat 62.

[0069] In a specific embodiment, the support mechanism 6 further includes a bearing assembly (not labeled). The bearing assembly is correspondingly arranged between the upper and lower ends of the coupling hole 621 and the turntable shaft 33 to rotatably connect the turntable shaft 33 to the support mechanism 6, so that the turntable shaft 33 can freely rotate around the central axis 10 relative to the support seat 62. At the same time, the bearing assembly can transmit the axial loads from the turntable 3 and the nuclear waste package 100 to the support body 1 through the support seat 62 and the support columns 61, avoiding the power output end 21 of the rotation driving member 2 from bearing the axial force and ensuring the normal operation of the rotation driving member 2.

[0070] The bearing assembly of this application is arranged between the turntable shaft and the coupling hole 621, and its size is a conventional size. Compared with the existing bearing mechanism assembled on a large-size gear ring, the device of this application avoids the use of large-size bearings, reduces costs, and the disassembly and assembly of the conventional-size bearing assembly are more convenient, which is conducive to later maintenance and disposal.

[0071] Please refer to Figure 3 and Figure 4 , in a specific embodiment, the bearing assembly includes a thrust bearing 63 and a radial bearing 64. Among them, the thrust bearing 63 is arranged between the upper end of the coupling hole 621 and the turntable shaft 33 to transmit the axial loads from the turntable 3 and the nuclear waste package 100 to the support mechanism 6 and the support body 1. The radial bearing 64 is arranged between the lower end of the coupling hole 621 and the turntable shaft 33 to bear the radial load between the turntable shaft 33 and the power output end 21 of the rotation driving member 2.

[0072] Please refer to Figure 7 , as a preference, the upper and lower ends of the coupling hole 621 are respectively provided with a first bearing groove 622 for positioning and installing the thrust bearing 63 and a second bearing groove 623 for positioning and installing the radial bearing 64. The first bearing groove 622 is located at the center of the upper end face of the support seat 62 and recesses downward to communicate with the coupling hole 621. The second bearing groove 623 is located at the center of the lower end face of the support seat 62 and recesses upward to communicate with the coupling hole 621.

[0073] Please refer to Figures 4 to 5, Preferably, the turntable shaft 33 includes a shaft main body 331 axially and fixedly connected to the center of the bottom of the turntable 3, and a coupling shaft portion 332 axially and fixedly connected to the lower part of the shaft main body 331. The outer diameter of the coupling shaft portion 332 is smaller than that of the shaft main body 331, and a horizontal annular stop step 333 is formed at the connection between the two. Correspondingly, an axial shaft fixing hole (not labeled) for fitting and inserting with the coupling shaft portion 332 is provided on the power output end 21 of the rotary driving member 2.

[0074] During actual assembly, the thrust bearing 63 is positioned and installed in the first bearing groove 622, and the radial bearing 64 is positioned and installed in the second bearing groove 623. The power output end 21 of the rotary driving member 2 axially extends to the second bearing groove 623 close to the coupling hole 621. The coupling shaft portion 332 of the turntable shaft 33 is inserted into the inner rings of the thrust bearing 63 and the radial bearing 64 from top to bottom in sequence until the stop step 333 stops on the upper end surface of the thrust shaft 63, and the end of the coupling shaft portion 332 extends out of the coupling hole 621 and is correspondingly fixedly inserted into the shaft fixing hole of the power output end 21, and then the turntable 3 is coaxially and fixedly connected to the power output end 21 of the rotary driving member 2 by cooperating with corresponding keys and key grooves (not shown in the figure).

[0075] Please refer to Figures 3 to 4 , In a specific embodiment, the support column 61 includes a support column main body 611, an upper connection stud 612 and a lower connection stud 613 respectively axially provided at the upper and lower ends of the support column main body 611, and the diameters of the upper connection stud 612 and the lower connection stud 613 are both smaller than that of the support column main body 611. An upper step surface (not labeled) is formed at the connection between the upper connection stud 612 and the support column main body 611, and a lower step surface (not labeled) is formed at the connection between the lower connection stud 613 and the support column main body 611.

[0076] Please refer to, 3, Figure 4 and Figure 7 , Preferably, a plurality of support seat fixing holes 624 that cooperate with the upper connection studs 612 one by one are vertically penetrated through the peripheral edge of the support seat 62. A plurality of support column fixing holes 114 that cooperate with the lower connection studs 613 one by one are vertically penetrated through the fixing plate 11 of the bracket body 1. A fixing edge 22 extends radially from the peripheral edge of the bottom of the rotary driving member 2, and a plurality of driving member fixing holes 221 that cooperate with the lower connection studs 613 one by one are vertically penetrated through the fixing edge 22.

[0077] During actual installation, the rotary driving member 2 is positioned and installed on the installation groove 111, and through rotational adjustment, the driving member fixing holes 221 and the support column fixing holes 114 are made to correspond vertically one by one. Each support column 61 is respectively vertically inserted into the corresponding driving member fixing hole 221 and support column fixing hole 114 through a lower connecting stud 613 until the lower step surface abuts against the fixing edge 22, and the end of the lower connecting stud 613 extends downward out of the support column fixing hole 114. Then, the support column fastening nuts 15 threadedly connected to the lower connecting studs 613 fix the support columns 61 and the rotary driving member 2 together vertically to the fixing plate 11. Then, the support seat 62 is horizontally seated on the support columns 61, and the upper connecting studs 612 are respectively inserted upward from below into the corresponding support seat fixing holes 624 until the upper step surface abuts against the lower end surface of the support seat 62, and the end of the upper connecting stud 612 extends upward out of the support seat fixing hole 624. Then, the support seat fastening nuts 16 threadedly connected to the upper connecting studs 612 fix the support seat 62 horizontally to the support columns 61. In this way, the convenient disassembly and assembly of the support seat 62, the support columns 61, and the rotary driving member 2 can be achieved by screwing the support seat fastening nuts 16 and the support column fastening nuts 15, improving the disassembly and assembly efficiency and facilitating later maintenance and disposal.

[0078] Please refer to Figure 2 , in a specific embodiment, the positioning structure 4 of the device of the present application includes a centering bracket 41 that is generally circular ring-shaped and coaxial with the turntable 3, and a plurality of support legs 42 fixedly connected to the outer side of the centering bracket 41. The support legs 42 and the turntable 3 are fixedly connected by a third threaded fastener 17, thereby detachably fixing the positioning structure 4 to the upper end surface of the turntable 3. The centering bracket 41 is preferably designed as an inwardly converging funnel-shaped structure that is wider at the top and narrower at the bottom, and the inner wall arc thereof coincides with the outer wall arc of the bottom of the nuclear waste package 100. In this way, the nuclear waste package 100 can be stably seated on the centering bracket 41 in a vertical posture and rotate synchronously with the turntable 3 under the limiting action of the centering bracket 41.

[0079] In a specific embodiment, the rotary driving member 2 of the device of the present application is a servo motor or a stepper motor, which can achieve precise control of the rotation angle of the power output end 21. The device of the present application further includes a control module (not shown in the figure), which can be arranged in a host computer (not shown in the figure) or in a PLC (not shown in the figure), and is electrically connected to the rotary driving member 2 through a control circuit to control the rotation angle and speed of the turntable 3.

[0080] Servo motors or stepper motors usually use optical encoders to monitor the actual position and speed of the rotor and provide feedback signals to the control module. The control module calculates and makes decisions based on the feedback information and generates appropriate control signals to adjust the behavior of the motor, achieve precise position, speed, and torque control of the rotor, and thus can precisely control the rotation angle and speed of the turntable 3, driving the nuclear waste package 100 to rotate by a certain angle to a suitable detection position to ensure the accuracy of the detection results.

[0081] Please refer to Figure 1 、 Figure 2 and Figure 4 In a specific embodiment, the device of the present application further includes a weighing module 7, which is arranged between the support body 1 and the support surface (usually a flat ground) supporting the support body 1 and is electrically connected to the control module. Preferably, the weighing module 7 includes four weighing sensor feet, which are vertically and evenly distributed on the bottom surface of the fixing plate 11, forming the bottom support foot structure of the support body 1, so as to cause the weighing sensor feet to generate weighing detection signals and send them to the control module when the support body 1 is under pressure, and then realize the detection of the mass of the nuclear waste package 100 through the internal algorithm of the control module, and comprehensively calculate the radioactivity of the nuclear waste package 100 based on the detection data of the detection probe.

[0082] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A rotary drive device for a nuclear waste package, characterized in that, including a support body (1) and the following components provided on the support body (1): a rotary drive member (2) vertically fixed in the support body (1) and having a power output end (21) extending axially; a turntable (3) rotatably connected to the support body (1) and fixedly connected coaxially with the power output end (21) to rotate directly driven by the rotary drive member (2); a positioning structure (4) fixed on the turntable (3) and coaxially with the turntable (3) and the rotary drive member (2) to position and restrict the nuclear waste package (100); a rotary support mechanism (5) vertically fixed in the support body (1) and circumferentially and uniformly distributed around the rotary drive member (2), and the top of the rotary support mechanism (5) rotatably abuts against the bottom of the turntable (3) to transfer the axial load from the turntable (3) and the nuclear waste package (100) to the support body (1).

2. The nuclear waste package rotary drive device according to claim 1, wherein The rotary support mechanism (5) includes: at least three support seats (51) vertically fixedly connected in the support body (1) and uniformly distributed around the rotary drive member (2); at least three rollers (52) rotatably connected to the top of the corresponding support seats (51) and at least partially rotatably abutting against the turntable (3).

3. The rotating drive device for nuclear waste packages according to claim 2, characterized in that, The rotary support mechanism (5) further includes an annular guide rail (54) coaxially fixedly connected to the bottom of the turntable (3) and movably pressing against the rollers (52) to guide the turntable (3) to rotate around the rotary support mechanism (5).

4. The nuclear waste package rotation driving device according to claim 1, characterized in that The device further includes a support mechanism (6) fixed in the support body (1) and at least partially coaxially located between the turntable (3) and the rotary drive member (2); a turntable shaft (33) is axially provided at the bottom of the turntable (3), and at least part of the turntable shaft (33) is movably inserted and axially limited in the support mechanism (6), and the turntable shaft (33) is coaxially fixedly connected to the power output end (21) through the support mechanism (6) to transfer the output torque of the rotary drive member (2) to the turntable (3).

5. The nuclear waste package rotary drive device according to claim 4, characterized in that, The support mechanism (6) includes: at least three support columns (61) vertically fixed in the support body (1) and uniformly distributed between the rotary drive member (2) and the rotary support mechanism (5) around the rotary drive member (2); a support seat (62) horizontally fixedly connected to the support columns (61) and coaxially located between the turntable (3) and the power output end (21), and a coupling hole (621) axially penetrating through the support seat (62) is provided; the lower part of the turntable shaft (33) is rotatably inserted into the coupling hole (621) and coaxially fixedly connected to the power output end (21).

6. The nuclear waste package rotating drive device according to claim 5, wherein The supporting mechanism (6) further includes a bearing assembly, and the bearing assembly is correspondingly arranged between the upper and lower ends of the coupling hole (621) and the turntable shaft (33).

7. The rotary drive device for nuclear waste packages according to claim 6, characterized in that, The bearing assembly includes: a thrust bearing (63), which is arranged between the upper end of the coupling hole (621) and the turntable shaft (33); a radial bearing (64), which is arranged between the lower end of the coupling hole (621) and the turntable shaft (33).

8. The rotating drive device for nuclear waste packages according to claim 1, characterized in that, An installation groove (111) for positioning and installing the rotary driving member (2) is provided on the bottom surface of the support body (1). An inspection opening (112) is provided at the center of the installation groove (111), and at least a part of the bottom of the rotary driving member (2) is exposed outside the inspection opening (112).

9. The nuclear waste package rotary drive device according to claim 1, characterized in that, The rotary driving member (2) is a servo motor or a stepping motor; the device further includes a control module, and the control module is electrically connected to the rotary driving member (2) to control the rotation angle and speed of the turntable (3).

10. The nuclear waste package rotating drive device according to claim 9, characterized in that, The device further includes a weighing module (7), and the weighing module (7) is arranged between the support body (1) and the support surface supporting the support body (1) and is electrically connected to the control module to measure the weight of the nuclear waste package (100).

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