Nuclear power steam turbine last stage blade rack
By designing a vertical placing rack for the final blades of nuclear power turbines, the problems of high cost of consumables, large space occupied and poor equipment protection during disassembly and placement are solved, and the effects of reducing costs, saving space and ensuring equipment safety are achieved.
Patent Information
- Application Number
- CN202421474960.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-25
AI Technical Summary
During the disassembly and placement of the low-voltage rotor final blades of a nuclear power turbine, the prior art has problems such as high cost of consumables, large maintenance sites, and unfavorable equipment protection.
A nuclear power turbine final blade placement frame is designed, including frame body, bottom plate, support beam, top beam and limit body. Through this frame design, the final blade of nuclear power turbine can be effectively placed and limited vertically to reduce the use of consumables and space occupied.
This placing rack effectively reduces the cost of consumables, reduces the occupation of maintenance sites, and prevents equipment damage through limit protection, ensuring the safety of precision components.
Smart Images
Figure CN222697203U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nuclear power, in particular to a last-stage blade placement rack for a nuclear power steam turbine. Background Art
[0002] A steam turbine contains 1 high-pressure cylinder and 2 low-pressure cylinders, and is designed with 4 floor-standing bearing seats. Since nuclear power units have a large power, most of them are million-unit units. Therefore, its design results in the weight of each last-stage blade of the low-pressure rotor reaching 110KG, its total height is about 1520mm, and its width is about 320mm. When the regular disassembly and inspection of the last-stage blades of the low-pressure rotor is carried out, it is necessary to disassemble all 122 blades (61 blades per stage) of the last-stage blades of the low-pressure rotor before and after the blades. Since a single last-stage blade cannot be placed vertically, the site can only use rubber pads on sleepers and place them horizontally, that is, two 2-meter-long sleepers are placed on three disassembled last-stage blades. In order to prevent personnel from moving, a stainless steel tripod is placed at the location where the last-stage blades are stored. It has the following problems: a large number of sleepers and shredded rubber are required on site, and the rubber cannot be reused after cutting, which pushes up the cost of maintenance consumables. The horizontal placement of the last-stage blades occupies a large amount of maintenance space, resulting in a shortage of maintenance space, which is not conducive to the standardized operation of the site. At the same time, the last-stage blades are precision components, and if they are placed horizontally and not properly protected, they are prone to maintenance rework due to unfavorable cost protection. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a nuclear power steam turbine last stage blade placement rack.
[0004] The utility model solves the technical problem by adopting a technical solution: constructing a nuclear power steam turbine last stage blade placement frame, including a frame body, the frame body including a bottom plate, a support beam, a first top beam and a second top beam;
[0005] The number of the support beams is at least two, and at least two of the support beams are respectively arranged at the two ends of the length direction of the bottom plate, the first top beam and the second top beam are both arranged parallel to the bottom plate, the first top beam and the second top beam are arranged in parallel with each other at intervals, and the two ends of the first top beam and the second top beam are respectively connected to the support beams, a plurality of first limiting bodies are arranged on the side of the first top beam away from the second top beam, the plurality of first limiting bodies are arranged in parallel with each other along the length direction of the first top beam, and the first limiting bodies are arranged in parallel with the bottom plate, and a first limiting space is formed between at least two adjacent first limiting bodies; a plurality of second limiting bodies are arranged on the side of the second top beam away from the first top beam, the plurality of second limiting bodies are arranged in parallel with each other along the length direction of the second top beam, and the second limiting bodies are arranged in parallel with the bottom plate, and a second limiting space is formed between at least two adjacent second limiting bodies;
[0006] A plurality of third limiting bodies are arranged on the bottom plate, and the plurality of third limiting bodies are arranged in parallel and at intervals along the length direction of the bottom plate, and the third limiting bodies are arranged opposite to the first limiting bodies; at least two adjacent third limiting bodies form a third limiting space, and the third limiting space is arranged opposite to the first limiting space, so as to accommodate at least one last-stage blade of a nuclear power steam turbine;
[0007] A plurality of fourth limiting bodies are provided on the base plate, and the plurality of the fourth limiting bodies are arranged in parallel and at intervals along the length direction of the base plate, and the fourth limiting bodies are arranged opposite to the second limiting bodies; at least two adjacent fourth limiting bodies form a fourth limiting space, and the fourth limiting space is arranged opposite to the second limiting space for the placement of at least one last stage blade of a nuclear power steam turbine.
[0008] In some embodiments, a first protective pad is disposed on the periphery of the first limiting body;
[0009] A second protection pad is disposed on the outer periphery of the second limiting body.
[0010] In some embodiments, the third limiting body is made of polyamide; the fourth limiting body is made of polyamide.
[0011] In some embodiments, a first protective member is disposed on the surface of the bottom plate located in the third limiting space; and a second protective member is disposed on the surface of the bottom plate located in the fourth limiting space.
[0012] In some embodiments, a first protective pad is disposed on the bottom plate, and all the third limiting bodies are disposed on the first protective pad.
[0013] In some embodiments, a second protection pad is disposed on the bottom plate, and all of the fourth limiting bodies are disposed on the second protection pad.
[0014] In some embodiments, the frame also includes a first limiting member for connecting a plurality of the first limiting bodies to limit the last stage blades of the nuclear power steam turbine located in the first limiting space.
[0015] In some embodiments, the frame also includes a second limiting member for connecting a plurality of the second limiting bodies to limit the last stage blades of the nuclear power steam turbine located in the second limiting space.
[0016] In some embodiments, the frame further includes a plurality of connecting beams, the plurality of connecting beams connect the first top beam and the second top beam, and the plurality of connecting beams are arranged in parallel and at intervals.
[0017] In some embodiments, the frame further includes a plurality of first reinforcing beams and a plurality of second reinforcing beams, wherein the plurality of first reinforcing beams connect the first top beam and the bottom plate; and the plurality of second reinforcing beams connect the second top beam and the bottom plate.
[0018] In some embodiments, the frame is also provided with a retaining rope for limiting the position of the last stage blades of the nuclear power steam turbine.
[0019] In some embodiments, the nuclear power steam turbine last stage blade placement rack also includes a moving mechanism connected to the rack.
[0020] In some embodiments, the frame is further provided with a plurality of hanging ears.
[0021] The implementation of the utility model has the following beneficial effects: the nuclear power steam turbine last stage blade placement rack solves the problem of difficulty in placing the nuclear power steam turbine last stage blades on site after disassembly, and can effectively reduce the cost of consumables compared to the solution of sleepers and rubber. The nuclear power steam turbine last stage blade placement rack can vertically place multiple nuclear power steam turbine last stage blades, which can effectively reduce the occupation of maintenance sites, and the nuclear power steam turbine last stage blade placement rack can effectively limit the nuclear power steam turbine last stage blades, which can avoid the risk of equipment damage caused by improper storage of nuclear power steam turbine last stage blades, and ensure the cost protection of precision components nuclear power steam turbine last stage blades. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:
[0023] Figure 1 It is a structural schematic diagram of a nuclear power steam turbine last stage blade placement rack in some embodiments of the utility model;
[0024] Figure 2 It is a structural schematic diagram of a nuclear power steam turbine last stage blade placement rack in some embodiments of the utility model;
[0025] Figure 3 It is a structural schematic diagram of a nuclear power steam turbine last stage blade placement rack in some embodiments of the utility model;
[0026] Figure 4 It is a schematic diagram of the application of the nuclear power steam turbine last stage blade placement rack in some embodiments of the utility model. DETAILED DESCRIPTION
[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.
[0028] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0029] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.
[0030] See also Figures 1 to 4The utility model shows a nuclear power steam turbine last stage blade placement rack, which includes a frame 10, the width of the frame 10 can be designed to be 820mm, the length can be designed to be 1650mm, and the height can be designed to be 1290mm. Each side of the frame 10 can store 11 nuclear power steam turbine last stage blades 100, and the two sides can store 22 nuclear power steam turbine last stage blades 100 in total. Alternatively, each side of the frame 10 can be designed to store 13 nuclear power steam turbine last stage blades 100, and the two sides can store 26 nuclear power steam turbine last stage blades 100 in total. The nuclear power steam turbine last stage blades 100 can be stored vertically, which greatly saves the placement space for the disassembled nuclear power steam turbine last stage blades.
[0031] In some embodiments, the frame 10 includes a bottom plate 11 , a support beam 12 , a first top beam 13 , and a second top beam 14 .
[0032] The bottom plate 11 is generally a rectangular plate structure, and the bottom plate 11 may also be provided with a plurality of support legs, and the bottom surface of the bottom plate 11 may also be provided with a plurality of reinforcing plates, reinforcing tubes or reinforcing ribs to improve the rigidity of the bottom plate 11. The number of the supporting beams 12 is at least two, and the supporting beams 12 may be tubular or plate-shaped. At least two support beams 12 are respectively arranged at the two ends of the length direction of the bottom plate 11, the first top beam 13 and the second top beam 14 are both arranged parallel to the bottom plate 11, the first top beam 13 and the second top beam 14 are arranged in parallel with each other, and the two ends of the first top beam 13 and the second top beam 14 are respectively connected to the support beam 12, a plurality of first limiting bodies 15 are arranged on the side of the first top beam 13 away from the second top beam 14, the plurality of first limiting bodies 15 are arranged in parallel with each other along the length direction of the first top beam 13, and the first limiting bodies 15 are arranged in parallel with the bottom plate 11, and a first limiting space is formed between at least two adjacent first limiting bodies 15; a plurality of second limiting bodies 16 are arranged on the side of the second top beam 14 away from the first top beam 13, the plurality of second limiting bodies 16 are arranged in parallel with each other along the length direction of the second top beam 14, and the second limiting bodies 16 are arranged in parallel with the bottom plate 11, and a second limiting space is formed between at least two adjacent second limiting bodies 16.
[0033] The bottom plate 11 is provided with a plurality of third limiting bodies 17, which are arranged in parallel and at intervals along the length direction of the bottom plate 11, and the third limiting bodies 17 are arranged opposite to the first limiting bodies 15; at least two adjacent third limiting bodies 17 form a third limiting space, and the third limiting space is arranged opposite to the first limiting space, so as to accommodate at least one nuclear power steam turbine last stage blade 100 (such as Figure 4 As shown, since there are multiple first limiting bodies 15 and multiple third limiting bodies 17, there are multiple first limiting spaces and multiple third limiting spaces, which can accommodate multiple nuclear power steam turbine last stage blades 100 vertically.
[0034] The bottom plate 11 is provided with a plurality of fourth limiting bodies 18, which are arranged in parallel and spaced apart along the length direction of the bottom plate 11, and the fourth limiting bodies 18 are arranged opposite to the second limiting bodies 16; at least two adjacent fourth limiting bodies 18 form a fourth limiting space, and the fourth limiting space is arranged opposite to the second limiting space, so as to accommodate at least one nuclear power steam turbine last stage blade 100 (such as Figure 4 As shown, since there are multiple second limiting bodies 16 and multiple fourth limiting bodies 18, there are multiple first limiting spaces and multiple third limiting spaces, which can accommodate multiple nuclear power steam turbine last stage blades 100 vertically.
[0035] like Figure 2 As shown, in some embodiments, the first limiting body 15 and the second limiting body 16 can both be rectangular parallelepiped structures, and their dimensions can be 40 mm in length, 3 mm in width, and 6 mm in thickness.
[0036] The first limiting bodies 15 and the second limiting bodies 16 may be arranged symmetrically, and the number of the first limiting bodies 15 and the second limiting bodies 16 may be equal. The spacing between adjacent first limiting bodies 15 may be 100 mm, and the spacing between adjacent second limiting bodies 16 may be 100 mm.
[0037] like Figure 1 As shown, in some embodiments, the first limiting body 15 is roughly a rectangular structure, and a first protective pad 151 is provided on the outer periphery of the first limiting body 15. The first protective pad 151 can be a nylon pad, which is wrapped around the circumferential outer side of the first limiting body 15. When the last stage blade 100 of the nuclear power steam turbine is placed on the frame 10, the last stage blade 100 of the nuclear power steam turbine is in contact with the first protective pad 151 and is not easily damaged.
[0038] Similarly, in some embodiments, the second limiting body 16 is roughly a rectangular structure, and a second protective pad 161 is provided on the outer periphery of the second limiting body 16. The second protective pad 161 can be a nylon pad, which is wrapped around the circumferential outer side of the second limiting body 16. When the last stage blade 100 of the nuclear power steam turbine is placed on the frame 10, the last stage blade 100 of the nuclear power steam turbine is in contact with the second protective pad 161 and is not easily damaged.
[0039] like Figure 2 As shown, the third limiting body 17 and the fourth limiting body 18 can be symmetrically arranged, and the number of the two is equal. The number of the third limiting body 17 can be equal to the number of the first limiting body 15, and the number of the fourth limiting body 18 can be equal to the number of the second limiting body 16.
[0040] Further, the third stopper 17 is made of polyamide, and preferably, the third stopper 17 can be a rectangular parallelepiped structure, and its dimensions are 70 mm in length, 25 mm in width, and 25 mm in thickness. When the nuclear power steam turbine last stage blade 100 is placed on the frame 10, the nuclear power steam turbine last stage blade 100 contacts the third stopper 17, and is not easily damaged.
[0041] Similarly, the fourth limiting body 18 is made of polyamide. Preferably, the third limiting body 17 can be a rectangular parallelepiped structure with a length of 70 mm, a width of 25 mm, and a thickness of 25 mm. When the nuclear power steam turbine last stage blade 100 is placed on the frame 10, the nuclear power steam turbine last stage blade 100 contacts the fourth limiting body 18 and is not easily damaged.
[0042] In some embodiments, the surface of the bottom plate 11 located in the third limited space is provided with a first protective member, which may be a block or sheet structure made of polyamide, and may be fixed on the bottom plate 11. When the last-stage blade 100 of the nuclear power steam turbine is placed on the frame 10, the last-stage blade 100 of the nuclear power steam turbine contacts the first protective member and is not easily damaged.
[0043] Similarly, the surface of the bottom plate 11 located in the fourth limited space is provided with a second protective member, which can be a block or sheet structure made of polyamide, and can be fixed on the bottom plate 11. When the last-stage blade 100 of the nuclear power steam turbine is placed on the frame 10, the last-stage blade 100 of the nuclear power steam turbine contacts the second protective member and is not easily damaged.
[0044] like Figure 1 As shown, in some embodiments, the bottom plate 11 is provided with a first protective pad 20, and all third limiters 17 are provided on the first protective pad 20. The third limiters 17 can be an integral structure with the first protective pad 20, and the first protective pad 20 can be made of polyamide, wherein when the nuclear power steam turbine last stage blade 100 is placed on the frame 10, the nuclear power steam turbine last stage blade 100 contacts the first protective pad 20 and is not easily damaged. Preferably, the thickness of the first protective pad 20 can be 20 mm.
[0045] like Figure 1 As shown, in other embodiments, the bottom plate 11 is provided with a second protective pad 30, and all fourth limiters 18 are provided on the second protective pad 30. The fourth limiter 18 can be an integral structure with the second protective pad 30, and the second protective pad 30 can be made of polyamide, wherein when the nuclear power steam turbine last stage blade 100 is placed on the frame 10, the nuclear power steam turbine last stage blade 100 contacts the second protective pad 30 and is not easily damaged. Preferably, the thickness of the second protective pad 30 can be 20 mm.
[0046] In some embodiments, the frame 10 further includes a first limiting member for connecting a plurality of first limiting bodies 15 to limit the last stage blades 100 of the nuclear power steam turbine located in the first limiting space. Figure 2 and Figure 3 As shown, some first limiting bodies 15 arranged at intervals are provided with a first connecting ear 152 at one end away from the first top beam 13. The first limiting member may be a rectangular structure. The two ends of the first limiting member in the length direction may be respectively provided with a second connecting ear. The second connecting ear may be connected and fixed to the corresponding first connecting ear 152 by fasteners, etc. The fastener may be a binding rope, a combination of bolts and nuts, or a snap, etc., so as to limit the last stage blades 100 of the nuclear power steam turbine located in the first limiting space, avoid displacement or flipping of the last stage blades 100 of the nuclear power steam turbine, etc., and avoid accidents of the last stage blades 100 of the nuclear power steam turbine.
[0047] Similarly, the frame 10 also includes a second limiting member for connecting a plurality of second limiting bodies 16 to limit the last stage blades of the nuclear power steam turbine located in the second limiting space. Figure 2 and Figure 3 As shown, some of the second limiting bodies 16 that are spaced apart are provided with a third connecting ear 162 at one end away from the second top beam 14. The second limiting member may be a rectangular structure. The two ends of the second limiting member in the length direction may be provided with a fourth connecting ear respectively. The fourth connecting ear may be connected and fixed to the corresponding third connecting ear 162 by fasteners, etc. The fasteners may be binding ropes, bolt and nut combinations, or snaps, etc., thereby limiting the last-stage blades 100 of the nuclear power steam turbine located in the second limiting space to prevent the last-stage blades 100 of the nuclear power steam turbine from being displaced or flipped, etc., and avoiding accidents to the last-stage blades 100 of the nuclear power steam turbine.
[0048] In other embodiments, the frame 10 is further provided with a restraining rope for limiting the position of the nuclear power steam turbine last stage blade 100, and the restraining rope can bind the nuclear power steam turbine last stage blade 100 to prevent the nuclear power steam turbine last stage blade 100 from displacement or flipping, etc., and can prevent accidents of the nuclear power steam turbine last stage blade 100. One end of the restraining rope can be fixed on the frame 10, such as the first top beam 13 or the second top beam 14, and the other end can be fixed on the frame 10, such as the first top beam 13 or the second top beam 14, after being bound to the nuclear power steam turbine last stage blade 100.
[0049] Combination Figure 1 and Figure 2As shown, in some embodiments, the frame 10 may further include a plurality of connecting beams 19 , which connect the first top beam 13 and the second top beam 14 , and are arranged in parallel and spaced apart. The connecting beams 19 may enhance the structural strength of the entire frame 10 .
[0050] like Figure 1 As shown, in some embodiments, the frame 10 further includes a plurality of first reinforcing beams 110 and a plurality of second reinforcing beams 120. The plurality of first reinforcing beams 110 connect the first top beam 13 and the bottom plate 11, thereby enhancing the structural strength of the entire frame 10. Figure 1 As shown, the number of the first reinforcing beams 110 can be two, the two first reinforcing beams 110 can be arranged at a certain angle, and the two first reinforcing beams 110 and the bottom plate 11 can roughly form a triangular structure.
[0051] Similarly, a plurality of second reinforcing beams 120 connect the second top beam 14 and the bottom plate 11 to enhance the structural strength of the entire frame 10. Figure 1 As shown, the number of the second reinforcing beams 120 can be two, the two second reinforcing beams 120 can be arranged at a certain angle, and the two second reinforcing beams 120 and the bottom plate 11 can roughly form a triangular structure.
[0052] In some embodiments, the nuclear power steam turbine last stage blade placement rack also includes a moving mechanism 40 connected to both ends of the frame 10 in the moving direction, the moving mechanism 40 can be connected to the support beam 12, the moving mechanism 40 can include a lifting assembly and a moving wheel arranged on the lifting assembly, the lifting assembly can be a motor screw lifting assembly, a hydraulic lifting assembly or a pneumatic lifting assembly, or the lifting assembly can be a hand-cranked jack, and the moving wheel can be a Fomar wheel or a universal wheel. The moving mechanism 40 can ensure the movement of the frame 10, and the moving wheel can be raised by the lifting assembly when it is not moving to improve its carrying capacity.
[0053] like Figure 1 and Figure 3 As shown, in some embodiments, the frame 10 is further provided with a plurality of lifting ears 130, and the lifting ears 130 may be connected to the support beam 12, or the lifting ears 130 may be connected to the first top beam 13 and the second top beam 14. The lifting ears 130 are provided to facilitate the lifting of the entire nuclear power steam turbine last stage blade placement rack.
[0054] In some embodiments, the frame 10 may be made of metal materials, such as carbon steel, stainless steel or other metal materials, which are not specifically limited here.
[0055] In some embodiments, the nuclear power steam turbine last stage blade placement rack may leave a certain width between each nuclear power steam turbine last stage blade 100 to prevent the adjacent nuclear power steam turbine last stage blade 100 from being scratched when the nuclear power steam turbine last stage blade 100 is moved.
[0056] The nuclear power steam turbine last stage blade placement rack solves the problem of difficulty in placing the nuclear power steam turbine last stage blades on site after disassembly. Compared with the solution of sleepers and rubber, it can effectively reduce the cost of consumables. The nuclear power steam turbine last stage blade placement rack can vertically place multiple nuclear power steam turbine last stage blades, which can effectively reduce the occupation of maintenance sites. The nuclear power steam turbine last stage blade placement rack can effectively limit the nuclear power steam turbine last stage blades, which can avoid the risk of equipment damage caused by improper storage of nuclear power steam turbine last stage blades, and ensure the cost protection of precision components nuclear power steam turbine last stage blades.
[0057] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.
Claims
1. A nuclear power steam turbine last stage blade placement rack, characterized in that: The frame (10) comprises a bottom plate (11), a support beam (12), a first top beam (13) and a second top beam (14); The number of the support beams (12) is at least two, and at least two of the support beams (12) are respectively arranged at two ends of the length direction of the bottom plate (11); the first top beam (13) and the second top beam (14) are both arranged parallel to the bottom plate (11); the first top beam (13) and the second top beam (14) are arranged parallel to each other with an interval, and the two ends of the first top beam (13) and the second top beam (14) are respectively connected to the support beam (12); a plurality of first limiting bodies (15) are arranged on a side of the first top beam (13) away from the second top beam (14); and the plurality of first limiting bodies (15) The first top beam (13) is arranged in parallel and at intervals along the length direction of the first top beam (13), and the first limiting body (15) is arranged in parallel with the bottom plate (11), and a first limiting space is formed between at least two adjacent first limiting bodies (15); a plurality of second limiting bodies (16) are arranged on the side of the second top beam (14) away from the first top beam (13), and the plurality of second limiting bodies (16) are arranged in parallel and at intervals along the length direction of the second top beam (14), and the second limiting body (16) is arranged in parallel with the bottom plate (11), and a second limiting space is formed between at least two adjacent second limiting bodies (16); The bottom plate (11) is provided with a plurality of third limiting bodies (17), the plurality of third limiting bodies (17) are arranged in parallel and spaced apart along the length direction of the bottom plate (11), and the third limiting bodies (17) are arranged opposite to the first limiting body (15); at least two adjacent third limiting bodies (17) form a third limiting space, the third limiting space is arranged opposite to the first limiting space, so as to accommodate at least one last-stage blade of a nuclear power steam turbine; A plurality of fourth limiting bodies (18) are provided on the bottom plate (11), and the plurality of fourth limiting bodies (18) are arranged in parallel and spaced apart along the length direction of the bottom plate (11), and the fourth limiting bodies (18) are arranged opposite to the second limiting bodies (16); at least two adjacent fourth limiting bodies (18) form a fourth limiting space, and the fourth limiting space is arranged opposite to the second limiting space for accommodating at least one last-stage blade of a nuclear power steam turbine.
2. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: A first protection pad (151) is provided on the outer periphery of the first limiting body (15); A second protection pad (161) is provided on the outer periphery of the second limiting body (16).
3. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The third limiting body (17) is made of polyamide; and the fourth limiting body (18) is made of polyamide.
4. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: A first protective member is provided on the surface of the bottom plate (11) located in the third limiting space; and a second protective member is provided on the surface of the bottom plate (11) located in the fourth limiting space.
5. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: A first protection pad (20) is provided on the bottom plate (11), and all the third limiting bodies (17) are provided on the first protection pad (20).
6. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: A second protection pad (30) is provided on the bottom plate (11), and all the fourth limiting bodies (18) are provided on the second protection pad (30).
7. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) also includes a first limiting member for connecting a plurality of the first limiting bodies (15) to limit the last-stage blades of the nuclear power steam turbine located in the first limiting space.
8. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) also includes a second limiting member for connecting a plurality of the second limiting bodies (16) to limit the last-stage blades of the nuclear power steam turbine located in the second limiting space.
9. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) further comprises a plurality of connecting beams (19), wherein the plurality of connecting beams (19) connect the first top beam (13) and the second top beam (14), and the plurality of connecting beams (19) are arranged in parallel and at intervals.
10. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) further comprises a plurality of first reinforcing beams (110) and a plurality of second reinforcing beams (120), wherein the plurality of first reinforcing beams (110) connect the first top beam (13) and the bottom plate (11); and the plurality of second reinforcing beams (120) connect the second top beam (14) and the bottom plate (11).
11. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) is also provided with a blocking rope for limiting the position of the last-stage blades of the nuclear power steam turbine.
12. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The nuclear power steam turbine last stage blade placement rack further comprises a moving mechanism (40) connected to the rack body (10).
13. The nuclear power steam turbine last stage blade placement rack according to claim 1, characterized in that: The frame (10) is also provided with a plurality of lifting ears (130).