A platform mechanism for nuclear power plant main equipment transportation passage

Abstract

This application provides a platform mechanism for a main equipment transport channel in a nuclear power plant. A through sleeve (10) is installed inside the reactor building of the nuclear power plant, and the platform mechanism is fixed inside the sleeve (10). The platform mechanism includes a lifting platform (1), a lifting drive device (5), a platform connecting frame (6), a telescopic platform (2), and a telescopic drive device (3). The lifting drive device (5) is connected to the lifting platform (1) through the platform connecting frame (6), and the lifting drive device (5) drives the lifting platform (1) to move in the vertical direction. The telescopic drive device (3) is connected to the telescopic platform (2), and the telescopic drive device (3) drives the telescopic platform (2) to move in the longitudinal direction. The platform mechanism has a retracted state and an extended state. In the extended state, the lifting platform (1) and the telescopic platform (2) can be moved to the same plane to form a transport channel.

Description

Technical Field

[0001] This invention belongs to the field of nuclear technology, specifically relating to a rapid telescopic lifting platform mechanism for the main equipment transportation channel of a pressurized water reactor nuclear power plant. Background Technology

[0002] Within the nuclear island of a nuclear power plant, there is a main equipment transport corridor used for the entry and exit of large equipment into and out of the reactor building during the construction and operation of the nuclear power plant. From the outside in, this corridor consists of the outer room, the equipment transport platform within the through sleeve acting on the containment structure, the equipment gates, the inner room, and the tracks on the outer room, through sleeve, and inner room.

[0003] The existing plan involves welding the steel structure of the heavy rail platform into a through-sleeve during nuclear power plant construction, and then laying steel plates on the steel structure to form a passageway. During the later stages of construction and operation, the heavy rail platform is removed, and a new steel structure for the light rail platform is laid, with a tilting device installed to create another passageway. However, current technology prevents the simultaneous installation of the heavy and light rail platforms. The heavy rail platform must be dismantled before the light rail platform can be installed, and the subsequent installation of the heavy rail platform also requires the dismantling of the light rail platform. This repeated dismantling and reconstruction disrupts the tight nuclear power plant construction schedule. Furthermore, during operation, manual operation is required to tilt the platform at the pit to create the passageway, which is inefficient.

[0004] Considering that the existing plan involves repeated demolition, high construction costs, and construction progress that cannot meet the requirements, as well as the low efficiency of manual operation and the fact that the operation cycle does not meet the time requirements for the formation of the existing main equipment transportation channel. Summary of the Invention

[0005] The purpose of this application is to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the first aspect of this application proposes a platform mechanism for transporting main equipment in a nuclear power plant. A through-sleeve is installed inside the reactor building of the nuclear power plant, and the platform mechanism is fixed within the sleeve. The platform mechanism includes: The lifting platform, the lifting drive device, and the platform connecting frame are provided. The lifting drive device is connected to the lifting platform through the platform connecting frame, and the lifting drive device drives the lifting platform to move in the vertical direction. The telescopic platform and the telescopic drive device are connected to the telescopic platform and drive the telescopic platform to move in the longitudinal direction. The platform mechanism has a retractable state and an extended state. In the retractable state, the telescopic platform and the lifting platform are stacked vertically. In the extended state, driven by the lifting drive device and the telescopic drive device, the lifting platform and the telescopic platform can be moved to the same plane to form a transport channel.

[0007] Furthermore, the lifting platform has a centerline extending in the longitudinal direction, and the first heavy rail car main beam and the first light rail car main beam are symmetrically arranged on both sides of the centerline.

[0008] Furthermore, the telescopic platform is symmetrically arranged with a second heavy rail car main beam and a second light rail car main beam on both sides of the centerline.

[0009] Furthermore, the platform mechanism also includes a lifting platform support. When the platform mechanism is in the retracted state, the lifting platform support is used to support the telescopic platform; when the platform mechanism is in the deployed state, the lifting platform support is used to support both the lifting platform and the telescopic platform.

[0010] Furthermore, the platform mechanism also includes a roller platform and a roller platform support. The roller platform is used to support the telescopic platform, and the roller platform is fixed on the roller platform support.

[0011] Furthermore, both the lifting platform support and the roller platform support are fixed inside the sleeve.

[0012] Furthermore, the roller platform is provided with n straight grooves for guiding and limiting the telescopic platform during the telescopic process.

[0013] Furthermore, the lifting platform is equipped with an inspection port, which is located above the lifting drive device.

[0014] Furthermore, multiple first grooves are opened on the n straight grooves, and the multiple first grooves are symmetrically arranged along the center line.

[0015] Furthermore, the platform mechanism also includes a docking support, on which a second groove is provided.

[0016] Furthermore, the telescopic platform is symmetrically provided with a first roller and a second roller along the center line. When the telescopic platform extends to the designated position, the first roller enters the first groove, and at the same time, the second roller enters the second groove.

[0017] To achieve the above objectives, the second aspect of this application proposes a brake caliper for rail transit vehicles, including a brake cylinder.

[0018] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The rapid telescopic lifting platform of the present invention adopts a fully automated design, with a telescopic drive device and a lifting drive device. Without human intervention, the platform can be extended and retracted with one click, improving operational efficiency, avoiding operational errors caused by human factors, and saving time for closing the equipment gate.

[0019] 2. The lifting platform and telescopic platform of the present invention have concave and convex structures, which increases the space at the bottom of the platform; at the same time, when the rapid telescopic lifting platform is retracted, the lifting device and the telescopic device are stacked on top of each other, which effectively saves the space occupied by the equipment.

[0020] 3. The present invention provides a misaligned groove on the roller platform to achieve precise positioning when the telescopic platform reaches the designated position, while avoiding the roller being under stress during the operation of the platform.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the platform mechanism for transporting main equipment in a nuclear power plant in its deployed state is shown. Figure 2 A schematic diagram of the platform mechanism used for transporting main equipment in a nuclear power plant during recovery is provided. Figure 3 A structural schematic diagram of the lifting drive device was presented; Figure 4 A structural schematic diagram of the platform connection frame was presented; Figure 5 A structural schematic diagram of the lifting platform was presented; Figure 6 The linear bearings and guide rails beneath the lifting platform were shown. Figure 7 A structural schematic diagram of the telescopic drive device was presented; Figure 8 A front structural diagram of the telescopic platform was shown; Figure 9 A schematic diagram of the reverse structure of the telescopic platform was shown; Figure 10 A structural diagram of the platform mechanism's slide rails and supports was presented; Figure 11 A structural schematic diagram of the aforementioned rolling platform is shown.

[0023] Attached reference numerals: 1. Lifting platform; 11. Inspection port; 12. Main beam of the first light rail car; 13. First steel plate; 14. Main beam of the first heavy rail car; 15. Linear bearing; 16. Guide rail; 2. Telescopic platform; 21. Second heavy rail main beam; 22. Second light rail main beam; 23. Second steel plate; 24. First roller; 25. Second roller; 26. Third roller; 27. Fourth roller; 3. Telescopic drive device; 31. Coupling; 32. Reducer; 33. Motor; 34. Lead screw and nut; 35. Lead screw; 36. Telescopic platform mounting frame; 37. Limit switch; 4. Connecting support; 5. Lifting drive device; 511. First coupling; 512. Second coupling; 513. Third coupling; 514. Fourth coupling; 515. Fifth coupling; 516. Sixth coupling; 517. Seventh coupling; 518. Eighth coupling; 519. Ninth coupling; 521. First drive shaft; 522. Second drive shaft; 523. Third drive shaft; 531. First screw jack; 532. Second screw jack; 533. Third screw jack; 534. Fourth screw jack; 541. First commutator; 542. Second commutator; 55. Motor; 56. Limit switch; 6. Platform connecting frame; 61. First lifting platform support bracket; 62. First lifting platform adapter bracket; 63. Second lifting platform support bracket; 64. Second lifting platform adapter bracket; 65. Third lifting platform support bracket; 7. Lifting platform support; 8. Roller platform support; 9. Roller platform; 91. Straight groove; 92. First groove; 10. Sleeve; Y represents the vertical direction; Z represents the longitudinal direction. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0026] This invention provides a platform mechanism for transporting main equipment in a nuclear power plant. The platform mechanism is installed within a through sleeve 10 inside the reactor building of the nuclear power plant. Figures 1-11As shown, the platform mechanism includes a lifting platform 1, a lifting drive device 5, a platform connecting frame 6, a telescopic platform 2, and a telescopic drive device 3. The lifting drive device 5 is connected to the lifting platform 1 via the platform connecting frame 6, and drives the lifting platform 1 to move vertically in the Y direction. The telescopic drive device 3 is connected to the telescopic platform 2, and drives the telescopic platform 2 to move longitudinally in the Z direction. The platform mechanism has a retracted state and an extended state. In the retracted state, the telescopic platform 2 and the lifting platform 1 are stacked vertically in the Y direction; in the extended state, driven by the lifting drive device 5 and the telescopic drive device 3, the lifting platform 1 and the telescopic platform 2 can move to the same plane, forming a transport channel. The platform mechanism of this invention adopts a fully automated design. By designing a set of telescopic drive device 3 and lifting drive device 5, it has a rapid telescopic lifting and extending function, requiring no human intervention. The extension and retraction of the platform can be achieved with one button, improving operational efficiency, avoiding operational errors caused by human factors, and saving time for closing the gates of nuclear power plant equipment.

[0027] Figure 2 The platform mechanism shown is a retracted telescopic platform 2 and a lifting platform 1 stacked vertically along the Y direction. The stacking of the lifting platform 1 and telescopic platform 2 effectively saves space. When a transport channel needs to be formed, the telescopic drive device 3 and the lifting drive device 5 are operated as follows: First, the lifting drive device 5 raises the lifting platform 1 to the top position; second, the telescopic drive device 3 extends the telescopic platform 2 above the docking support 4; finally, the lifting drive device 5 lowers the lifting platform 1 to the same plane as the telescopic platform 2, thus forming a transport channel. The lifting platform 1 has a centerline extending along the longitudinal direction Z, with the first heavy rail main beam 14 and the first light rail main beam 12 symmetrically arranged on both sides of the centerline.

[0028] Lifting platform 1 Figure 1 , Figure 5 As shown, the entire platform is convex in shape and stacked on top of the telescopic platform 2, greatly reducing storage space. Several transverse secondary load-bearing beams are erected between the first heavy rail main beam 14 and the first light rail main beam 12 on both sides of the lifting platform 1, and a first steel plate 13 is laid on the beams. For ease of maintenance, two inspection ports 11 are provided in the middle of the lifting platform 1, above the lifting drive device 5. Figure 6 As shown, four guide rails 16 are also installed below the lifting platform 1 to facilitate the vertical movement of the lifting platform 1. The guide rails 16 are connected to the lifting platform 1 through linear bearings 15. The lifting platform 1 adopts an integrated design of the first heavy rail car main beam 14 and the first light rail car main beam 12, realizing the one-time installation and permanent use of the heavy rail platform and the light rail platform, avoiding repeated dismantling of the platform.

[0029] from Figure 3It can be seen that the lifting drive device 5 uses 9 sets of couplings, namely the first coupling 511, the second coupling 512, the third coupling 513, the fourth coupling 514, the fifth coupling 515, the sixth coupling 516, the seventh coupling 517, the eighth coupling 518, and the ninth coupling 519; 3 sets of drive shafts, namely the first drive shaft 521, the second drive shaft 522, and the third drive shaft 523; 4 sets of screw jacks, namely the first screw jack 531, the second screw jack 532, the third screw jack 533, and the fourth screw jack 534; and 2 sets of commutators, namely the first commutator 541 and the second commutator 542. The lifting drive device 5 is also equipped with a limit switch 56. The motor 55 controls the 4 sets of screw jacks to move up and down simultaneously through multiple couplings and commutators, thereby realizing the lifting of the lifting platform 1.

[0030] The lifting platform 1 and the lifting drive device 5 are connected by a platform connecting frame 6. The platform connecting frame 6 is as follows: Figure 4 As shown, the system includes a first lifting platform support bracket 61, a first lifting platform adapter bracket 62, a second lifting platform support bracket 63, a second lifting platform adapter bracket 64, and a third lifting platform support bracket 65. The first lifting platform adapter bracket 62 and the second lifting platform adapter bracket 64 are connected via the first lifting platform support bracket 61 and the second lifting platform support bracket 63, and are supported below by the three third lifting platform support brackets 65. The lifting platform 1 is fixed to the first lifting platform adapter bracket 62 and the second lifting platform adapter bracket 64.

[0031] Telescopic platform 2 Figure 8 , Figure 9 As shown. Figure 8 This is a front structural diagram of the telescopic platform 2. The telescopic platform 2 is U-shaped, and the second heavy rail main beam 21 and the second light rail main beam 22 are symmetrically arranged on both sides of the center line. Several crossbeams are also installed between the second heavy rail main beam 21 and the second light rail main beam 22 on the telescopic platform 2, and the second steel plate 23 is laid on the crossbeams. Figure 9 This is a schematic diagram of the reverse structure of the telescopic platform. The telescopic platform is equipped with symmetrical first rollers 24 and second rollers 25 on both sides to reduce frictional resistance during the telescopic platform 2's extension and retraction. The lifting platform 1 and telescopic platform 2 of this invention have a concave-convex structure, increasing the bottom space of the platform structure; simultaneously, when the rapidly extending lifting platform retracts, the lifting device and the telescopic device are stacked vertically, effectively saving space occupied by the equipment.

[0032] When the telescopic platform 2 and the lifting platform 1 form a transport channel, the first heavy rail main beam 14 and the second heavy rail main beam 21 are connected, and the first light rail main beam 12 and the second light rail main beam 22 are connected. This invention adopts an integrated light and heavy rail design, achieving one-time installation and permanent use, avoiding repeated platform dismantling, and saving costs and construction time.

[0033] Figure 7 The telescopic drive device 3 is shown, including a motor 33, a reducer 32, a coupling 31, a lead screw 35, a lead screw nut 34, a telescopic platform mounting frame 36, and two limit switches 37. The telescopic drive device uses a structure where the motor 33, in conjunction with the reducer 32 and coupling 31, drives the lead screw 35 to rotate, thus driving the lead screw nut 34 to move back and forth. The movement of the lead screw nut 34 is transmitted to the telescopic platform 2 through the telescopic platform mounting frame 36, thereby driving the telescopic platform 2 to perform telescopic movement. Two sets of telescopic drive devices 3 can be installed below the telescopic platform 2.

[0034] The platform mechanism's slide rails and supports, such as Figure 10 , Figure 11 As shown, considering that the platform needs to bear a load of 450 tons, a support platform is set below the telescopic platform 2 and the lifting platform 1. The support platform is welded to the through sleeve 10.

[0035] The support platform includes a lifting platform support 7. When the platform mechanism is in the retracted state, the lifting platform support 7 is used to support the telescopic platform 2; when the platform mechanism is in the extended state, the lifting platform support 7 is used to support the lifting platform 1 and the telescopic platform 2.

[0036] The support platform also includes a roller platform 9 and a roller platform support 8, i.e., a docking support 4. The roller platform 9 supports the telescopic platform 2, and the roller platform support 8 is directly welded to the through sleeve 10. The roller platform 9 is fixed to the roller platform support 8 with bolts. A second groove is provided on the docking support 4. To reduce friction during the telescopic platform 2's extension and retraction, n straight grooves 91 are provided on the roller platform 9 for guiding and limiting the telescopic platform 2 during extension and retraction. Multiple first grooves 92 are formed on the n straight grooves 91, and the multiple first grooves 92 are symmetrically arranged along the center line. Figure 10 The rolling platform 9 shown has four straight grooves for guiding and limiting the extension and retraction of the telescopic platform 2. Ten groove blocks are provided on the four straight grooves, arranged symmetrically on the left and right.

[0037] The telescopic platform 2 is symmetrically equipped with multiple first rollers 24 and multiple second rollers 25. When the telescopic platform 2 extends to the designated position, that is, when the telescopic drive device 3 extends the telescopic platform 2 outward above the docking support 4, the first rollers 24 enter the first groove 92, and the second rollers 25 simultaneously enter the second groove of the docking support 4. The third rollers 26 and the fourth rollers 27, which are close to the first rollers 24 and second rollers 25, also enter their corresponding first grooves 92. The telescopic platform 2 rolls in the straight groove 91 under the action of the telescopic drive device 3. When the telescopic platform 2 extends to the designated position, the second rollers 25 on the telescopic platform 2 enter the second groove, and the first rollers 24, which are symmetrically distributed on both sides of the center line, simultaneously enter the first grooves 92 on the roller platform 9.

[0038] Figure 9 In the telescopic platform 2, the six symmetrically distributed first rollers 24, third rollers 26, and fourth rollers 27 are positioned in their corresponding first grooves 92. After these grooves enter the corresponding first grooves, the entire telescopic platform 2 descends and rests on the roller platform 9 and the lifting platform support 7. The staggered groove design prevents the rollers from being under stress during operation.

[0039] Among them, the lifting platform support 7, the roller platform support 8, and the roller platform 9 are all fixed inside the sleeve 10 and are symmetrically distributed along the center line of the sleeve 10.

[0040] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The rapid telescopic lifting platform of the present invention adopts a fully automated design, with a telescopic drive device and a lifting drive device. Without human intervention, the platform can be extended and retracted with one click, improving operational efficiency, avoiding operational errors caused by human factors, and saving time for closing the equipment gate.

[0041] 2. The lifting platform and telescopic platform of the present invention have concave and convex structures, which increases the space at the bottom of the platform; at the same time, when the rapid telescopic lifting platform is retracted, the lifting device and the telescopic device are stacked on top of each other, which effectively saves the space occupied by the equipment.

[0042] 3. The present invention provides a misaligned groove on the roller platform to achieve precise positioning when the telescopic platform reaches the designated position, while avoiding the roller being under stress during the operation of the platform.

[0043] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0045] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should know that this application is not limited to the described order of actions, because according to this application, some steps may be performed in other orders or simultaneously.

[0046] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A platform mechanism for transporting main equipment in a nuclear power plant, wherein a through sleeve (10) is provided inside the reactor building of the nuclear power plant, and the platform mechanism is fixed inside the sleeve (10), characterized in that, The platform organizations include: The lifting platform (1), the lifting drive device (5) and the platform connecting frame (6) are provided. The lifting drive device (5) is connected to the lifting platform (1) through the platform connecting frame (6). The lifting drive device (5) drives the lifting platform (1) to move in the vertical direction. Telescopic platform (2) and telescopic drive device (3), wherein the telescopic drive device (3) is connected to the telescopic platform (2), and the telescopic drive device (3) drives the telescopic platform (2) to move in the longitudinal direction; The platform mechanism has a retracted state and an extended state. In the retracted state, the telescopic platform (2) and the lifting platform (1) are superimposed along the vertical direction. In the extended state, under the drive of the lifting drive device (5) and the telescopic drive device (3), the lifting platform (1) and the telescopic platform (2) can be moved to the same plane to form a transport channel.

2. The platform structure according to claim 1, characterized in that, The lifting platform (1) has a centerline extending along the longitudinal direction, and a first heavy rail main beam (14) and a first light rail main beam (12) are symmetrically arranged on both sides of the centerline.

3. The platform structure according to claim 2, characterized in that, The telescopic platform (2) has a second heavy rail main beam (21) and a second light rail main beam (22) symmetrically arranged on both sides of the center line.

4. The platform structure according to claim 3, characterized in that, The platform mechanism also includes a lifting platform support (7). When the platform mechanism is in the retracted state, the lifting platform support (7) is used to support the telescopic platform (2). When the platform mechanism is in the deployed state, the lifting platform support (7) is used to support the lifting platform (1) and the telescopic platform (2).

5. The platform mechanism according to claim 4, characterized in that, The platform mechanism also includes a roller platform (9) and a roller platform support (8). The roller platform (9) is used to support the telescopic platform (2), and the roller platform (9) is fixed on the roller platform support (8).

6. The platform structure according to claim 5, characterized in that, The lifting platform support (7) and the roller platform support (8) are both fixed inside the sleeve (10).

7. The platform structure according to claim 6, characterized in that, The roller platform (9) is provided with n straight grooves (91) for guiding and limiting the telescopic platform (2) during the telescopic process.

8. The platform structure according to claim 7, characterized in that, The lifting platform (1) has an inspection port (11) located above the lifting drive device (5).

9. The platform structure according to claim 8, characterized in that, Multiple first grooves (92) are opened on the n straight grooves (91), and the multiple first grooves (92) are symmetrically arranged along the center line.

10. The platform structure according to claim 9, characterized in that, The platform mechanism also includes a docking support (4), on which a second groove is provided.

11. The platform structure according to claim 10, characterized in that, The telescopic platform (2) is symmetrically provided with a first roller (24) and a second roller (25) along the center line. When the telescopic platform (2) extends to the designated position, the first roller (24) enters the first groove (92), and at the same time, the second roller (25) enters the second groove.

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