Self-leveling maintenance platform for high temperature gas cooled reactors

Abstract

This invention belongs to the field of reactor maintenance technology, specifically disclosing an automatic leveling maintenance platform for high-temperature gas-cooled reactors (HTGRs), aiming to solve the problem of how to quickly and safely level the platform. This automatic leveling maintenance platform for HTGRs primarily uses a leveling fluid to automatically level the float. During the leveling process, it only requires controlling the water-driving assembly to move the shell close to the inner bottom surface of the storage tank, and after the float is leveled, controlling the slider assembly and the lifting guide mechanism to lock and fix it. No complex and time-consuming fine-tuning control is required, thus enabling automatic and rapid leveling and locking of the float, resulting in better leveling effect and more convenient operation. When applied to the spherical top cover of the pressure vessel of a HTGR for maintenance operations, the support legs of the support assembly no longer need to extend or retract, avoiding damage to the spherical top cover surface caused by large force changes due to the extension and retraction of the support legs, and preventing safety accidents such as platform overturning.

Description

Technical Field

[0001] This invention belongs to the field of reactor maintenance technology, specifically relating to an automatic leveling maintenance platform for high-temperature gas-cooled reactors. Background Technology

[0002] High-temperature gas-cooled reactors are fourth-generation reactors. During their service life, the absorber shutdown system and control rod shutdown system on the spherical top cover of the pressure vessel need to be disassembled and repaired. The entire repair process must be carried out on the spherical top cover of the pressure vessel. The success of the repair will directly affect whether the reactor operates normally and whether the operating cost is low.

[0003] To ensure successful maintenance, an automatically leveling maintenance platform installed on the spherical top cover of the pressure vessel is required. Existing automatic leveling maintenance platforms achieve leveling by using retractable support legs and a control system that individually controls the extension and retraction of each leg. This approach is problematic because, on the one hand, the control system is complex, and fine-tuning requires lengthy and repeated adjustments; on the other hand, the extension and retraction of the support legs causes significant changes in the force on the fulcrum, easily leading to slippage, damage to the spherical top cover surface causing it to become unusable, and even platform overturning. Therefore, how to achieve rapid and safe leveling is a pressing issue that needs to be addressed with existing automatic leveling maintenance platforms. Summary of the Invention

[0004] This invention provides an automated leveling maintenance platform for high-temperature gas-cooled reactors, aiming to solve the problem of how to level quickly and safely.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an automatic leveling maintenance platform for high-temperature gas-cooled reactors, including a platform body and a support component for supporting the platform body; it also includes a floating leveling component and a water-driving component;

[0006] The platform body includes a liquid storage tank and a shell that is nested and fitted with the liquid storage cavity of the liquid storage tank; the liquid storage cavity of the liquid storage tank is filled with leveling liquid, and the bottom plate of the shell is provided with an inlet and outlet structure for the leveling liquid to enter and exit.

[0007] The floating leveling assembly includes a float plate disposed in the working cavity of the housing. At least three telescopic rods are disposed on the side wall of the float plate and are evenly distributed along the circumference of the float plate. A slider assembly is movably connected to the telescopic end of the telescopic rod. The slider assembly is disposed on the inner side wall of the housing through a lifting guide mechanism, and the slider assembly can move along the lifting guide mechanism and can be locked and fixed with the lifting guide mechanism.

[0008] The water-driving component is installed on the platform body and can drive the shell to approach or move away from the inner bottom surface of the liquid storage tank so that the leveling liquid flows into or out of the working cavity of the shell from the liquid inlet / outlet structure, providing buoyancy for the automatic leveling of the float.

[0009] Furthermore, the liquid inlet / outlet structure includes an inlet port and an outlet port;

[0010] There are at least three liquid inlet holes, which are evenly distributed around the central axis of the shell on the bottom plate of the shell;

[0011] There are at least three liquid outlet holes, which are evenly distributed around the central axis of the shell on the bottom plate of the shell.

[0012] Furthermore, the liquid inlet / outlet structure also includes an upper spring switch assembly for opening and closing the liquid inlet hole and a lower spring switch assembly for opening and closing the liquid outlet hole.

[0013] The number of upper spring switch assemblies is equal to the number of liquid inlet holes, and they are arranged in a one-to-one correspondence; the upper spring switch assembly includes a spring support plate disposed in the working cavity of the housing, an upper spring disposed at the bottom of the spring support plate, and an upper sealing head disposed at the lower end of the upper spring, the upper sealing head sealing the upper liquid outlet of the liquid inlet hole.

[0014] The number of lower spring switch assemblies is equal to the number of liquid outlet holes, and they are set in a one-to-one correspondence; the lower spring switch assembly includes a lower spring set on the bottom surface of the liquid storage tank, and a lower sealing head is set at the upper end of the lower spring, which seals the lower liquid outlet of the liquid outlet hole.

[0015] Furthermore, the support assembly includes at least three support legs disposed at the bottom of the liquid storage tank, with each support leg evenly distributed around the central axis of the platform body.

[0016] Furthermore, the float is a circular structure, and the telescopic rod is arranged radially along the float.

[0017] Furthermore, a sliding groove is provided on the inner sidewall of the housing;

[0018] The slider assembly includes a slider housing, one end of which is provided with a slider end cap. The slider end cap and the slider housing together form a vertically penetrating slider cavity. From top to bottom, an upper ball bearing component, a locking plate component, and a lower ball bearing component are sequentially arranged in the slider cavity. The locking plate component includes a locking plate bracket, within which a driving locking plate and a passive locking plate pulsatorically connected to the driving locking plate are disposed. A locking space is formed between the passive locking plate and the driving locking plate. The slider assembly also includes a locking motor disposed on the slider housing. The locking motor is pulsatorically connected to the driving locking plate and can drive the driving locking plate to move closer to or further away from the passive locking plate.

[0019] The lifting guide mechanism includes a slide rod disposed in a sliding groove. The slide rod passes through a locking space and rolls with the balls of the upper ball component and the lower ball component, respectively.

[0020] Furthermore, the lifting guide mechanism also includes a slide bar support block disposed at the upper end of the sliding groove;

[0021] The upper end of the slide rod is connected to the slide rod support block, and the lower end of the slide rod is connected to the lower end wall of the sliding groove.

[0022] Springs are provided between the outer wall surface of the driving locking plate and the inner wall surface of the locking plate bracket, as well as between the outer wall surface of the passive locking plate and the inner wall surface of the locking plate bracket, and the springs are in a compressed state.

[0023] Furthermore, the water-driving assembly includes at least three motor drive mechanisms evenly distributed along the circumference of the housing. Each motor drive mechanism includes a motor bracket mounted on the outer wall of the housing, a drive motor mounted on the motor bracket, and a lead screw connected to the drive end of the drive motor. The lead screw is engaged with a threaded hole in the wall of the liquid storage tank.

[0024] Furthermore, the automated leveling maintenance platform for high-temperature gas-cooled reactors also includes control components;

[0025] The control component includes a controller that is communicatively connected to the drive motor and a liquid level sensor that is communicatively connected to the controller.

[0026] The liquid level sensor comprises at least three sensors, which are disposed within the working chamber of the housing and evenly distributed around the central axis of the housing.

[0027] Furthermore, a liquid level sensor mounting groove is provided on the inner side wall of the housing, and the liquid level sensor is installed in the liquid level sensor mounting groove.

[0028] The beneficial effects of this invention are:

[0029] 1) This automatic leveling maintenance platform for high-temperature gas-cooled reactors incorporates a water-driving component on its main body. This component drives the shell closer to or further away from the inner bottom surface of the liquid storage tank, allowing leveling fluid to flow into or out of the working chamber of the shell from the inlet / outlet structure. Furthermore, a float plate is installed within the working chamber. This float plate is movably connected via a telescopic rod to a slider assembly that moves along a lifting guide mechanism and can be locked in place with it. Therefore, the leveling fluid flowing into the working chamber provides buoyancy to the float plate, enabling it to automatically and quickly level itself. After leveling, the float plate is locked in place by the slider assembly. When applied to the spherical top cover of the pressure vessel for high-temperature gas-cooled reactors for maintenance operations, the support legs of the support assembly no longer need to extend or retract, avoiding damage to the spherical top cover surface caused by significant force changes due to the extension and retraction of the support legs, and preventing platform overturning and other safety accidents.

[0030] 2) During the automatic leveling process of the automatic leveling maintenance platform for high-temperature gas-cooled reactors, the float is automatically leveled mainly by leveling fluid. It is only necessary to control the water driving component to drive the shell close to the inner bottom surface of the liquid storage tank so that the leveling fluid flows into the working cavity of the shell from the liquid inlet and outlet structure. After the float is leveled, the slider assembly is locked and fixed with the lifting guide mechanism. There is no need for complex and time-consuming fine-tuning control. Therefore, it can realize automatic and fast leveling and locking of the float, with better leveling effect and more convenient operation.

[0031] 3) The leveling fluid also has a vibration damping and buffering effect on the float. The vibration generated by the platform during maintenance is less likely to affect the support legs. The leveling fluid can also reduce the hazards caused by safety accidents such as platform sliding or falling. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the half-section structure of the present invention. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the half-section structure of the present invention. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the vertical cross-sectional structure of the present invention in its working state;

[0035] Figure 4 This is a three-dimensional isometric view of the shell in this invention;

[0036] Figure 5 This is a schematic diagram of the vertical cross-sectional structure of the slider assembly in this invention. Figure 1 ;

[0037] Figure 6 This is a schematic diagram of the vertical cross-sectional structure of the slider assembly in this invention. Figure 2 ;

[0038] Figure 7 This is a three-dimensional isometric view of the locking plate component in this invention;

[0039] Figure 8 This is a horizontal cross-sectional view of the locking plate component in this invention;

[0040] The components in the diagram are labeled as follows: platform body 100, liquid storage tank 110, lower spring 111, lower sealing head 112, housing 120, working chamber 121, sliding groove 122, liquid inlet 123, liquid outlet 124, liquid level sensor mounting groove 125, spring support plate 126, upper spring 127, upper sealing head 128, support assembly 200, support leg 210, floating leveling assembly 300, float plate 310, telescopic rod 320, slider assembly 330, and sliding plate. Block housing 331, slider end cover 332, upper ball bearing component 333, lower ball bearing component 334, locking plate bracket 335, drive locking plate 336, passive locking plate 337, locking motor 338, spring 339, lifting guide mechanism 340, slide bar 341, slide bar support block 342, synchronizing rod 351, water driving assembly 400, motor drive mechanism 410, motor bracket 411, drive motor 412, lead screw 413, liquid level sensor 510. Detailed Implementation

[0041] The invention will now be further described with reference to the accompanying drawings.

[0042] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. The term "multiple" refers to three or more. The expression "mainly composed of or constituted by" can be interpreted as also including structural components not mentioned in the sentence. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0043] Combination Figure 1 and Figure 2 As shown, the automatic leveling maintenance platform for high-temperature gas-cooled reactors includes a platform body 100 and a support assembly 200 for supporting the platform body 100; it also includes a floating leveling assembly 300 and a water-driving assembly 400.

[0044] The platform body 100 includes a liquid storage tank 110 and a housing 120 nested within the liquid storage cavity of the liquid storage tank 110. The liquid storage cavity of the liquid storage tank 110 contains a leveling liquid, which can be of various types, such as water, oil, etc. The housing 120 is mainly used to temporarily store the leveling liquid and install and support the floating leveling component 300. A sealing structure is usually provided between the housing 120 and the cavity wall of the liquid storage cavity. For example, an annular groove is provided on the outer side wall of the housing 120, and a sealing ring is provided in the annular groove. The bottom plate of the housing 120 is provided with an inlet / outlet structure for the leveling liquid to enter and exit. The inlet / outlet structure can be of various types, such as inlet / outlet holes, inlet / outlet pipes, etc.

[0045] The support assembly 200 is a component that is installed and supports the entire platform. It typically includes at least three support legs 210 located at the bottom of the liquid storage tank 110, with each support leg 210 evenly distributed around the central axis of the platform body 100. The support leg 210 can have various structures, preferably including a leg rod body and a movable joint located at the upper end of the leg rod body. The leg rod body can be a straight rod, a telescopic rod, a cylinder, a hydraulic cylinder, etc., and the movable joint can be a rotary joint, a spherical rotating head, etc.

[0046] The floating leveling component 300 is a component capable of automatic leveling and locking. The floating leveling component 300 includes a float 310 disposed in the working cavity 121 of the housing 120. The float 310 is made of a material capable of floating on the leveling liquid, or is constructed as a structure capable of floating on the leveling liquid, such as a hollow structure, a porous structure, etc. The float 310 can be circular, rectangular, polygonal, or other shapes. At least three telescopic rods 320 are evenly distributed along the circumference of the float 310 on its sidewall. The telescopic rods 320 are mainly used for horizontally limiting and fixing the float 310, and their fixing ends are generally vertically connected to the sidewall of the float 310 by means of threads, screws, welding, etc. The telescopic rods 320 can... Various types of components can be used, such as cylinders, hydraulic cylinders, electric push rods, etc.; a slider assembly 330 is movably connected to the telescopic end of the telescopic rod 320. The slider assembly 330 is mounted on the inner wall of the housing 120 via a lifting guide mechanism 340, and the slider assembly 330 can move along the lifting guide mechanism 340 and be locked and fixed with the lifting guide mechanism 340; the slider assembly 330 is mainly used to fix the float 310 in the vertical direction, and its movable connection with the telescopic end of the telescopic rod 320 can be in various ways, such as hinged, movably connected via a universal joint, etc.; the lifting guide mechanism 340 is mainly used to guide the slider assembly 330 and the parts connected to the slider assembly 330 in the vertical direction, and it can be a guide rod structure, a guide groove structure, etc.

[0047] The water-driving component 400 is installed on the platform body 100. It can drive the housing 120 to approach or move away from the inner bottom surface of the liquid storage tank 110, so that the leveling liquid flows into or out of the working chamber 121 of the housing 120 from the liquid inlet / outlet structure, providing buoyancy for the automatic leveling of the float 310. The water-driving component 400 is a component that drives the housing 120 to move. It can be of various types, such as: a cylinder or a component mainly composed of multiple cylinders, a hydraulic cylinder or a component mainly composed of multiple hydraulic cylinders, an electric push rod or a component mainly composed of multiple electric push rods, a component mainly composed of a motor and a ball screw pair, etc.

[0048] During the automatic leveling process of this automatic leveling maintenance platform for high-temperature gas-cooled reactors, the water-driving assembly 400 drives the shell 120 close to the inner bottom surface of the liquid storage tank 110, so that the leveling liquid flows into the working chamber of the shell 120 from the inlet / outlet liquid structure. Since a float 310 is set in the working chamber of the shell 120, and the float 310 is movably connected to a slider assembly 330 via a telescopic rod 320, which can move along the lifting guide mechanism 340 and be locked with the lifting guide mechanism 340, the float 310 can be automatically and quickly leveled by the leveling liquid. In this process, only the water-driving assembly 400 and the slider assembly 330 need to be controlled, without the need for complex and time-consuming fine-tuning control. When applied to the spherical top cover of the pressure vessel of a high-temperature gas-cooled reactor for maintenance operations, the support legs 210 of the support assembly 200 no longer need to perform telescopic movements, avoiding damage to the surface of the spherical top cover caused by large force changes due to the extension and retraction of the support legs 210, and preventing safety accidents such as platform overturning.

[0049] In order to ensure that the leveling liquid flows evenly into or out of the working chamber 121 of the housing 120, such as Figure 4 As shown, the liquid inlet / outlet structure includes a liquid inlet hole 123 and a liquid outlet hole 124;

[0050] There are at least three liquid inlet holes 123, which are evenly distributed around the central axis of the housing 120 on the bottom plate of the housing 120; that is, multiple liquid inlet holes 123 are arranged in a ring array on the bottom plate of the housing 120 with the central axis of the housing 120 as the array center line.

[0051] There are at least three liquid outlet holes 124, which are evenly distributed around the central axis of the housing 120 on the bottom plate of the housing 120; that is, multiple liquid outlet holes 124 are arranged in a ring array on the bottom plate of the housing 120 with the central axis of the housing 120 as the array center line.

[0052] To ensure stable and rapid inflow and outflow of the leveling liquid, it is preferable to use another type of liquid. Figure 4 As shown, there are four inlet holes 123, and the distance between them and the central axis of the housing 120 is greater than the distance between the outlet hole 124 and the central axis of the housing 120.

[0053] The liquid outlet holes 124 include two groups. The first group has eight liquid outlet holes 124 arranged in a ring array near the center of the housing 120. The second group has four liquid outlet holes 124 arranged in a ring array near the inner sidewall of the housing 120. The total number of liquid outlet holes 124 is twelve.

[0054] Preferred, combined Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the liquid inlet / outlet structure also includes an upper spring switch assembly for opening and closing the liquid inlet hole 123 and a lower spring switch assembly for opening and closing the liquid outlet hole 124.

[0055] The number of upper spring switch assemblies is equal to the number of liquid inlet holes 123, and they are arranged in a one-to-one correspondence. The upper spring switch assembly includes a spring support plate 126 disposed in the working cavity of the housing 120, an upper spring 127 disposed at the bottom of the spring support plate 126, and an upper sealing head 128 disposed at the lower end of the upper spring 127. The upper sealing head 128 seals the upper liquid outlet of the liquid inlet hole 123. The top of the spring support plate 126 is usually provided with a non-metallic buffer material layer to prevent the float plate 310 from having a rigid collision with the spring support plate 126 when it descends.

[0056] The number of lower spring switch assemblies is equal to the number of liquid outlet holes 124, and they are arranged in a one-to-one correspondence. Each lower spring switch assembly includes a lower spring 111 disposed on the bottom surface of the liquid storage tank 110. The upper end of the lower spring 111 is provided with a lower sealing head 112, which seals the lower liquid outlet of the liquid outlet hole 124. The upper and lower spring switch assemblies are mainly used to control the flow rate of the leveling liquid into and out of the working chamber of the housing 120, and to prevent the leveling liquid from flowing back during operation.

[0057] To improve the efficiency of automatic leveling and ensure stability, preferably, the float 310 has a circular structure, and the telescopic rod 320 is arranged radially along the float 310. The circular float 310 facilitates rapid adjustment on the liquid surface and provides good stability.

[0058] Specifically, four telescopic rods 320 are provided on the side wall of the float plate 310. In order to simplify the structure and ensure the flexibility of the connection, the telescopic ends of the telescopic rods 320 are movably connected to the slider assembly 330 through universal joints; the universal joints include a hinge part that allows the telescopic rods 320 and the slider assembly 330 to rotate relative to each other, and a rotating joint that allows the telescopic rods 320 to rotate around their own central axis.

[0059] Preferred, combined Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a sliding groove 122 is provided on the inner sidewall of the housing 120;

[0060] The slider assembly 330 includes a slider housing 331, with a slider end cap 332 at one end. The slider end cap 332 and the slider housing 331 together form a vertically penetrating slider cavity. From top to bottom, an upper ball bearing component 333, a locking plate component, and a lower ball bearing component 334 are sequentially arranged in the slider cavity. The locking plate component includes a locking plate bracket 335, within which a driving locking plate 336 and a passive locking plate 337 are pulsatorically connected to the driving locking plate 336. A locking space is formed between the passive locking plate 337 and the driving locking plate 336. The slider assembly 330 also includes a locking motor 338 mounted on the slider housing 331. The locking motor 338 is pulsatorically connected to the driving locking plate 336 and can drive the driving locking plate 336 to move closer to or further away from the passive locking plate 337.

[0061] The lifting guide mechanism 340 includes a slide rod 341 disposed in the sliding groove 122. The slide rod 341 passes through the locking space and rolls with the balls of the upper ball component 333 and the lower ball component 334 respectively.

[0062] The drive locking plate 336 and the passive locking plate 337 can be connected in various ways, such as by a synchronous rod 351, or by a threaded rod with the threads of the drive locking plate 336 and the passive locking plate 337 having opposite directions of rotation. When it is necessary to lock the slider assembly 330 and the lifting guide mechanism 340, the locking motor 338 drives the drive locking plate 336 to move closer to the passive locking plate 337, thereby driving the locking plate 336 and / or the passive locking plate 337 to press against the slide bar 341 to achieve locking. When it is necessary to release, the locking motor 338 drives the drive locking plate 336 to move away from the passive locking plate 337, thereby driving the locking plate 336 and the passive locking plate 337 away from the slide bar 341 to achieve release, ensuring that the slider assembly 330 can slide relative to the lifting guide mechanism 340.

[0063] Based on the above, in order to improve the contact friction, a friction enhancement layer is usually provided on the inner wall surface of both the driving locking plate 336 and the passive locking plate 337. The friction enhancement layer is usually made of a wear-resistant material with a high coefficient of friction, such as rubber.

[0064] To facilitate the installation and fixing of slide bar 341, for example... Figure 1 , Figure 2 and Figure 3 As shown, the lifting guide mechanism 340 also includes a slide bar support block 342 disposed at the upper end of the sliding groove 122;

[0065] The upper end of the slide rod 341 is connected to the slide rod support block 342, and the lower end of the slide rod 341 is connected to the lower end wall of the sliding groove 122.

[0066] To facilitate the adjustment of the drive locking plate 336 and the passive locking plate 337, and to ensure the locking effect, combined with Figure 6 , Figure 7 and Figure 8 As shown, springs 339 are provided between the outer wall of the driving locking plate 336 and the inner wall of the locking plate bracket 335, and between the outer wall of the passive locking plate 337 and the inner wall of the locking plate bracket 335. The springs 339 are in a compressed state. The springs 339 can provide an initial locking force for the driving locking plate 336 and the passive locking plate 337, which is conducive to effective locking and fixing, without clamping the slide rod 341 too tightly, thus avoiding damage to the surface of the slide rod 341. In addition, the springs 339 can ensure that the driving locking plate 336 and the passive locking plate 337 always lock the slide rod 341 when the locking motor 338 or the transmission fails.

[0067] To improve the locking effect of spring 339 and ensure the stability of the locking plate component, it is preferable to further combine... Figure 7 and Figure 8 As shown, there are a total of eight springs 339, four of which are arranged in a rectangular array between the outer wall of the driving locking plate 336 and the inner wall of the locking plate bracket 335, and the other four are arranged in a rectangular array between the outer wall of the passive locking plate 337 and the inner wall of the locking plate bracket 335.

[0068] In order to limit and fix the spring 339, a spring fixing groove is usually provided at its abutment part.

[0069] Specifically, and then combined Figure 1 and Figure 2 As shown, the water-driving assembly 400 includes at least three motor drive mechanisms 410 evenly distributed circumferentially along the housing 120. Each motor drive mechanism 410 includes a motor bracket 411 mounted on the outer wall of the housing 120. A drive motor 412 is mounted on the motor bracket 411, and a lead screw 413 is connected to the drive end of the drive motor 412. The lead screw 413 is engaged with a threaded hole in the wall of the liquid storage tank 110. Thus, by driving the lead screw 413 to rotate via the drive motor 412, the housing 120 can be moved closer to or away from the inner bottom surface of the liquid storage tank 110 under the action of threaded transmission. The drive motor 412 can be of various types, preferably a stepper motor or servo motor for easy speed control, to effectively control the distance between the housing 120 and the inner bottom surface of the liquid storage tank 110, improving the efficiency and effect of leveling.

[0070] Preferably, the automated leveling maintenance platform for high-temperature gas-cooled reactors also includes control components;

[0071] The control component includes a controller that is communicatively connected to the drive motor 412 and a liquid level sensor 510 that is communicatively connected to the controller. Communication connection refers to the communication between connected devices through signal transmission and interaction, which can be divided into wired connection and wireless connection. Wired connection is usually a cable, optical fiber, etc.; wireless connection is usually a radio communication, Bluetooth, infrared, NFC, etc.

[0072] At least three level sensors 510 are provided, which are arranged in the working cavity of the housing 120 and evenly distributed around the central axis of the housing 120. The level sensors 510 are mainly used to detect whether there is enough leveling liquid in the working cavity of the housing 120. Generally, when no level sensor 510 detects leveling liquid, the controller controls the drive motor 412 to run quickly, so that the housing 120 quickly approaches the inner bottom surface of the storage tank 110. When one or more level sensors 510 detect leveling liquid, the controller controls the drive motor 412 to reduce the driving speed, so that the housing 120 slowly approaches the inner bottom surface of the storage tank 110. When all level sensors 510 detect leveling liquid, the controller controls the drive motor 412 to stop working.

[0073] Specifically, for example Figure 4 As shown, a liquid level sensor mounting groove 125 is provided on the inner side wall of the housing 120, and the liquid level sensor 510 is disposed in the liquid level sensor mounting groove 125.

[0074] Preferably, the central angle between the liquid level sensor mounting groove 125 and the sliding groove 122 is 45°. Arranging the liquid level sensor 510 at this angle facilitates optimal detection of the leveling liquid level from various orientations, ensuring effective detection of the leveling liquid even when the platform is tilted.

[0075] The automatic leveling maintenance platform for high-temperature gas-cooled reactors is installed on the spherical top cover of the pressure vessel of the high-temperature gas-cooled reactor. By controlling the position of the shell 120, leveling fluid flows into its working chamber, causing the float plate 310 inside the shell 120 to float on the leveling fluid due to buoyancy and automatically level itself. The specific process is as follows:

[0076] S1. Installation and leveling;

[0077] The automated leveling maintenance platform for high-temperature gas-cooled reactors is installed at the desired position on the spherical top cover of the pressure vessel using the support assembly 200. The support legs 210 are then roughly adjusted and secured. Figure 1 and Figure 2As shown, at this time, the float 310 is located on the inner bottom surface of the shell 120, and the inner bottom surface of the liquid storage tank 110 is furthest from the inner bottom surface of the shell 120. The entire platform may be in a tilted state, but... Figure 1 and Figure 2 The text appears to be in a horizontal format.

[0078] When none of the level sensors 510 on the inner wall of the housing 120 are submerged in the leveling liquid, the drive motor 412 rotates rapidly, causing the housing 120 to quickly approach the inner bottom surface of the storage tank 110. The leveling liquid in the storage tank 110 squeezes the upper sealing head 128, causing the upper spring 127 to contract, and flows into the working cavity of the housing 120 through the inlet hole 123. The float plate 310 floats up due to the leveling liquid and drives the slider assembly 330 to rise. By adjusting the length of the telescopic rod 320 and the rotation position of the telescopic rod 320 relative to the slider assembly 330, the float plate 310 quickly levels itself. As the liquid level inside the housing 120 rises, some of the level sensors 510 will be submerged. At this time, the signal will be received by the controller, which will control the drive motor 412 to reduce its speed, thereby making the float plate 310 perform fine-tuning more smoothly. When all the level sensors 510 are submerged, the controller controls the drive motor 412 to stop rotating. At this time, the float plate 310 is in a horizontal state. Figure 3 As shown.

[0079] S2, Locking operation;

[0080] Combination Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, after the float 310 is leveled, the locking motor 338 in the slider assembly 330 will drive the driving locking plate 336 and the passive locking plate 337 to move closer together. The driving locking plate 336 and / or the passive locking plate 337 move towards the slide rod 341, the spring 339 is partially relaxed, and the passive locking plate 337 will move towards the slide rod 341 under the influence of the synchronizing rod 351. Finally, the driving locking plate 336 and the passive locking plate 337 contact and hold the slide rod 341, achieving locking and fixing. The slider assembly 330 will be unable to move up and down. At this time, the float 310 will be fixed in a horizontal position, and the maintenance platform is locked and fixed, allowing maintenance work to be carried out on the platform. The spring 339 can further provide clamping force to the locking plate and can continue to complete the locking work in the event of unexpected situations such as the locking motor 338 disengaging.

[0081] S3, Platform Recycling;

[0082] After the maintenance is completed, the locking motor 338 in the slider assembly 330 will drive the drive locking plate 336 to move away from the slide bar 341 and drive the synchronous rod 351 to move. The spring 339 will be further compressed, and the passive locking plate 337 will move away from the slide bar 341 under the influence of the synchronous rod 351. Finally, the locking plate will release the slide bar 341, and the slider assembly 330 can move up and down along the slide bar 341. At this time, the drive motor 412 will rotate rapidly, driving the housing 120 to rise rapidly away from the inner bottom surface of the liquid storage tank 110. The leveling liquid in the housing 120 will press down the sealing head 112, causing the lower spring 111 to contract, and then the housing... The leveling fluid inside body 120 flows out from outlet 124 into storage tank 110. The float 310 is affected by the leveling fluid and drives the slider assembly 330 downward. The descent is achieved by adjusting the extension and rotation of telescopic rod 320. As the leveling fluid level drops, some level sensors 510 will float to the surface. At this time, the signal will be received by the controller, which will control the drive motor 412 to reduce its speed. The float 310 will descend more smoothly. When the storage tank 110 contacts the limiting boss at the lower end of the outer wall of the housing 120, the controller will control the drive motor 412 to stop rotating. At this time, the entire maintenance platform can be removed from the spherical top cover of the pressure vessel.

Claims

1. An automatic leveling maintenance platform for high-temperature gas-cooled reactors, comprising a platform body (100) and outrigger assemblies (200) for supporting the platform body (100); characterized in that: It also includes a floating leveling assembly (300) and a water-driving assembly (400); The platform body (100) includes a liquid storage tank (110) and a shell (120) nested with the liquid storage cavity of the liquid storage tank (110); the liquid storage cavity of the liquid storage tank (110) is filled with leveling liquid, and the bottom plate of the shell (120) is provided with an inlet / outlet structure for the leveling liquid to enter and exit; the inner side wall of the shell (120) is provided with a sliding groove (122). The floating leveling assembly (300) includes a float plate (310) disposed in the working cavity (121) of the housing (120). At least three telescopic rods (320) are disposed on the side wall of the float plate (310) and are evenly distributed around the circumference of the float plate (310). A slider assembly (330) is movably connected to the telescopic end of the telescopic rod (320). The slider assembly (330) is disposed on the inner side wall of the housing (120) through a lifting guide mechanism (340), and the slider assembly (330) can move along the lifting guide mechanism (340) and can be locked and fixed with the lifting guide mechanism (340). The slider assembly (330) includes a slider housing (331), one end of which is provided with a slider end cap (332). The slider end cap (332) and the slider housing (331) together form a vertically penetrating slider cavity. An upper ball bearing component (333), a locking plate component, and a lower ball bearing component (334) are arranged sequentially from top to bottom in the slider cavity. The locking plate component includes a locking plate bracket (335), and a drive mechanism is provided within the locking plate bracket (335). The sliding block assembly (330) includes a locking plate (336) and a passive locking plate (337) that is driven and connected to the driving locking plate (336). A locking space is formed between the passive locking plate (337) and the driving locking plate (336). The sliding block assembly (330) also includes a locking motor (338) disposed on the sliding block housing (331). The locking motor (338) is driven and connected to the driving locking plate (336) and can drive the driving locking plate (336) to move closer to or further away from the passive locking plate (337). The lifting guide mechanism (340) includes a slide rod (341) disposed in a sliding groove (122). The slide rod (341) passes through the locking space and rolls with the balls of the upper ball component (333) and the lower ball component (334), respectively. The water-driving component (400) is installed on the platform body (100), which can drive the shell (120) to approach or move away from the inner bottom surface of the liquid storage tank (110) so that the leveling liquid flows into or out of the working chamber (121) of the shell (120) from the liquid inlet / outlet structure, providing buoyancy for the automatic leveling of the float (310).

2. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 1, characterized in that: The liquid inlet / outlet structure includes a liquid inlet (123) and a liquid outlet (124). The liquid inlet holes (123) are at least three and are evenly distributed on the bottom plate of the housing (120) around the central axis of the housing (120); There are at least three liquid outlet holes (124), which are evenly distributed around the central axis of the housing (120) on the bottom plate of the housing (120).

3. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 2, characterized in that: The liquid inlet / outlet structure also includes an upper spring switch assembly for opening and closing the liquid inlet (123) and a lower spring switch assembly for opening and closing the liquid outlet (124). The number of upper spring switch assemblies is equal to the number of liquid inlet holes (123), and they are arranged in a one-to-one correspondence; the upper spring switch assembly includes a spring support plate (126) disposed in the working cavity of the housing (120), an upper spring (127) disposed at the bottom of the spring support plate (126), and an upper sealing head (128) disposed at the lower end of the upper spring (127), the upper sealing head (128) sealing the upper liquid outlet of the liquid inlet hole (123); The number of the lower spring switch assemblies is equal to the number of the liquid outlet holes (124), and they are set in a one-to-one correspondence; the lower spring switch assembly includes a lower spring (111) set on the bottom surface of the liquid storage tank (110), and a lower sealing head (112) is set at the upper end of the lower spring (111), and the lower sealing head (112) is sealed at the lower liquid outlet of the liquid outlet hole (124).

4. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 1, characterized in that: The leg assembly (200) includes at least three support legs (210) disposed at the bottom of the liquid storage tank (110), and each support leg (210) is evenly distributed around the central axis of the platform body (100).

5. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 1, characterized in that: The float (310) has a circular structure, and the telescopic rod (320) is arranged radially along the float (310).

6. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 1, characterized in that: The lifting guide mechanism (340) also includes a slide bar support block (342) disposed at the upper end of the sliding groove (122). The upper end of the slide rod (341) is connected to the slide rod support block (342), and the lower end of the slide rod (341) is connected to the lower end wall of the sliding groove (122). Springs (339) are provided between the outer wall of the driving locking plate (336) and the inner wall of the locking plate bracket (335), and between the outer wall of the passive locking plate (337) and the inner wall of the locking plate bracket (335). The springs (339) are in a compressed state.

7. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to any one of claims 1 to 6, characterized in that: The water-driving assembly (400) includes at least three motor drive mechanisms (410) evenly distributed circumferentially along the housing (120). Each motor drive mechanism (410) includes a motor bracket (411) disposed on the outer side wall of the housing (120). A drive motor (412) is disposed on the motor bracket (411). A lead screw (413) is connected to the drive end of the drive motor (412). The lead screw (413) is engaged with a threaded hole in the wall of the liquid storage tank (110).

8. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 7, characterized in that: It also includes control components; The control components include a controller that is communicatively connected to the drive motor (412) and a liquid level sensor (510) that is communicatively connected to the controller. There are at least three liquid level sensors (510), which are arranged in the working cavity of the housing (120) and evenly distributed around the central axis of the housing (120).

9. The automatic leveling maintenance platform for high-temperature gas-cooled reactors according to claim 8, characterized in that: The inner wall of the housing (120) is provided with a liquid level sensor mounting groove (125), and the liquid level sensor (510) is installed in the liquid level sensor mounting groove (125).

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