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CN-116168860-B - Automatic leveling type maintenance platform for high-temperature gas cooled reactor

CN116168860BCN 116168860 BCN116168860 BCN 116168860BCN-116168860-B

Abstract

The invention belongs to the technical field of reactor overhaul, and particularly discloses an automatic leveling type overhaul platform for a high-temperature gas cooled reactor, which aims to solve the problem of how to quickly and safely level. The automatic leveling type maintenance platform for the high-temperature gas cooled reactor mainly enables the floating plate to automatically level through the leveling liquid, only the water driving component is controlled to drive the shell to be close to the inner bottom surface of the liquid storage tank in the leveling process, and the sliding block component is controlled to be locked and fixed with the lifting guide mechanism after the floating plate is leveled, so that complex and time-consuming fine adjustment control is not needed, automatic quick leveling and locking operation of the floating plate can be achieved, the leveling effect is better, the maintenance operation is more convenient to operate and control, the automatic leveling type maintenance platform is applied to a spherical top cover of a pressure container of the high-temperature gas cooled reactor, supporting legs of the supporting component do not need to do telescopic movement any more, the surface of the spherical top cover is prevented from being damaged due to large-scale stress changes caused by telescopic supporting legs, and safety accidents such as platform overturning can be prevented.

Inventors

  • LUO YING
  • JIANG YIWEI
  • CHEN SHUHUA
  • DU HUA
  • DONG DAILIN

Assignees

  • 中国核动力研究设计院
  • 四川大学

Dates

Publication Date
20260505
Application Date
20230107

Claims (9)

  1. 1. The automatic leveling type maintenance platform for the high-temperature gas cooled reactor comprises a platform main body (100) and a supporting leg assembly (200) for supporting the platform main body (100), and is characterized by further comprising a floating leveling assembly (300) and a water driving assembly (400); The platform main body (100) comprises a liquid storage tank (110) and a shell (120) which is nested and matched with a liquid storage cavity of the liquid storage tank (110), wherein leveling liquid is filled in the liquid storage cavity of the liquid storage tank (110), a liquid inlet and outlet structure for the leveling liquid to enter and exit is arranged on a bottom plate of the shell (120), and a sliding groove (122) is arranged on the inner side wall of the shell (120); the floating leveling assembly (300) comprises a floating plate (310) arranged in a working cavity (121) of the shell (120), at least three telescopic rods (320) uniformly distributed along the circumferential direction of the floating plate (310) are arranged on the side wall of the floating plate (310), the telescopic ends of the telescopic rods (320) are movably connected with sliding block assemblies (330), the sliding block assemblies (330) are arranged on the inner side wall of the shell (120) through lifting guide mechanisms (340), and the sliding block assemblies (330) can move along the lifting guide mechanisms (340) and can be locked and fixed with the lifting guide mechanisms (340); The sliding block assembly (330) comprises a sliding block shell (331), wherein one end of the sliding block shell (331) is provided with a sliding block end cover (332), the sliding block end cover (332) and the sliding block shell (331) jointly enclose a sliding block cavity which is penetrated up and down, an upper ball component (333), a locking piece component and a lower ball component (334) are sequentially arranged in the sliding block cavity from top to bottom, the locking piece component comprises a locking piece bracket (335), a driving locking piece (336) and a driven locking piece (337) in transmission connection with the driving locking piece (336) are arranged in the locking piece bracket (335), a locking space is formed between the driven locking piece (337) and the driving locking piece (336), the locking motor (338) is in transmission connection with the driving locking piece (336) and can drive the driving locking piece (336) to enable the driving locking piece (336) to be relatively close to or far away from the driven locking piece (337); The lifting guide mechanism (340) comprises a sliding rod (341) arranged in the sliding groove (122), and the sliding rod (341) passes through the locking space and is respectively in rolling fit with the balls of the upper ball part (333) and the balls of the lower ball part (334); The water driving assembly (400) is arranged on the platform main body (100) and can drive the shell (120) to be close to or far away from the inner bottom surface of the liquid storage tank (110), so that leveling liquid flows into or out of the working cavity (121) of the shell (120) from the liquid inlet and outlet structure, and buoyancy is provided for automatic leveling of the floating plate (310).
  2. 2. The self-leveling type maintenance platform for the high-temperature gas cooled reactor according to claim 1, wherein the liquid inlet and outlet structure comprises a liquid inlet hole (123) and a liquid outlet hole (124); At least three liquid inlets (123) are uniformly distributed on the bottom plate of the shell (120) around the central axis of the shell (120); the number of the liquid outlet holes (124) is at least three, and the liquid outlet holes are uniformly distributed on the bottom plate of the shell (120) around the central axis of the shell (120).
  3. 3. The self-leveling type maintenance platform for a high-temperature gas cooled reactor according to claim 2, wherein the liquid inlet and outlet structure further comprises an upper spring switch assembly for opening and closing a liquid inlet hole (123) and a lower spring switch assembly for opening and closing a liquid outlet hole (124); The upper spring switch assembly comprises spring support plates (126) arranged in the working cavity of the shell (120), upper springs (127) arranged at the bottoms of the spring support plates (126) and upper sealing heads (128) arranged at the lower ends of the upper springs (127), wherein the upper sealing heads (128) are blocked at the upper liquid outlet of the liquid inlet holes (123); the number of the lower spring switch assemblies is equal to that of the liquid outlet holes (124) and the lower spring switch assemblies are correspondingly arranged, the lower spring switch assemblies comprise lower springs (111) arranged on the inner bottom surface of the liquid storage tank (110), lower sealing heads (112) are arranged at the upper ends of the lower springs (111), and the lower sealing heads (112) are blocked at the lower liquid outlet holes of the liquid outlet holes (124).
  4. 4. The self-leveling service platform for a high temperature gas cooled reactor according to claim 1, wherein said leg assembly (200) comprises at least three support legs (210) disposed at the bottom of the reservoir (110), each support leg (210) being evenly distributed about the central axis of the platform body (100).
  5. 5. The self-leveling type maintenance platform for a high temperature gas cooled reactor according to claim 1, wherein the floating plate (310) has a circular structure, and the telescopic rods (320) are arranged along the radial direction of the floating plate (310).
  6. 6. The self-leveling type maintenance platform for a high temperature gas cooled reactor according to claim 1, wherein the lifting guide mechanism (340) further comprises a sliding rod supporting block (342) arranged at the upper end of the sliding groove (122); the upper end of the sliding rod (341) is connected with a sliding rod supporting block (342), and the lower end of the sliding rod (341) is connected with the lower end groove wall of the sliding groove (122); Springs (339) are arranged between the outer wall surface of the driving lock plate (336) and the inner wall surface of the lock plate bracket (335) and between the outer wall surface of the passive lock plate (337) and the inner wall surface of the lock plate bracket (335), and the springs (339) are in a compressed state.
  7. 7. The self-leveling type maintenance platform for a high temperature gas cooled reactor according to any one of claims 1 to 6, wherein the water driving assembly (400) comprises at least three motor driving mechanisms (410) which are uniformly distributed along the circumferential direction of the shell (120), the motor driving mechanisms (410) comprise motor brackets (411) arranged on the outer side wall of the shell (120), driving motors (412) are arranged on the motor brackets (411), a lead screw (413) is connected to the driving end of each driving motor (412) in a transmission manner, and the lead screw (413) is connected with threaded holes formed in the groove wall of the liquid storage groove (110) in a matching manner.
  8. 8. The self-leveling service platform for a high temperature gas cooled reactor as set forth in claim 7, further comprising a control assembly; The control assembly comprises a controller in communication with the drive motor (412) and a liquid level sensor (510) in communication with the controller; The liquid level sensors (510) are at least three, are arranged in the working cavity of the shell (120) and are uniformly distributed around the central axis of the shell (120).
  9. 9. The self-leveling type maintenance platform for a high-temperature gas cooled reactor according to claim 8, wherein a liquid level sensor mounting groove (125) is formed in the inner side wall of the shell (120), and the liquid level sensor (510) is arranged in the liquid level sensor mounting groove (125).

Description

Automatic leveling type maintenance platform for high-temperature gas cooled reactor Technical Field The invention belongs to the technical field of reactor overhaul, and particularly relates to an automatic leveling type overhaul platform for a high-temperature gas cooled reactor. Background The high temperature gas cooled reactor is a fourth generation reactor, and in the service period, an absorption ball shutdown system, a control rod shutdown system and the like on a spherical top cover of a pressure vessel are required to be disassembled and overhauled, the whole overhauling process is required to be operated on the spherical top cover of the pressure vessel, and whether the overhauling is successful or not directly influences whether the subsequent operation condition of the reactor is normal or not and whether the operation cost is lower or not. In order to ensure that the maintenance can be successfully completed, an maintenance platform which is arranged on the spherical top cover of the pressure vessel and can be automatically leveled is needed. The existing automatic leveling type maintenance platform realizes automatic leveling by adopting telescopic supporting legs and a control system for respectively controlling the expansion and contraction of each supporting leg, on one hand, the control system is required to carry out complex control, and long time is required to carry out repeated adjustment during final fine adjustment, on the other hand, the telescopic movement of the supporting legs can cause the stress of a fulcrum to be greatly changed, the supporting legs are easy to slide, the surface of a spherical top cover is damaged to cause scrapping of the spherical top cover, and even safety accidents such as platform overturning occur. Therefore, how to quickly and safely level is a problem that needs to be solved by existing self-leveling type maintenance platforms. Disclosure of Invention The invention provides an automatic leveling type maintenance platform for a high-temperature gas cooled reactor, and aims to solve the problem of how to quickly and safely level. The invention solves the technical problems by adopting the technical scheme that the automatic leveling type maintenance platform for the high-temperature gas cooled reactor comprises a platform main body, a supporting component, a floating leveling component and a water driving component, wherein the supporting component is used for supporting the platform main body; the platform main body comprises a liquid storage tank and a shell nested and matched with a liquid storage cavity of the liquid storage tank, wherein leveling liquid is filled in the liquid storage cavity of the liquid storage tank, and a liquid inlet and outlet structure for the leveling liquid to enter and exit is arranged on a bottom plate of the shell; the floating leveling assembly comprises a floating plate arranged in a working cavity of the shell, at least three telescopic rods uniformly distributed along the circumferential direction of the floating plate are arranged on the side wall of the floating plate, the telescopic ends of the telescopic rods are movably connected with sliding block assemblies, the sliding block assemblies are arranged on the inner side wall of the shell through lifting guide mechanisms, and the sliding block assemblies can move along the lifting guide mechanisms and can be locked and fixed with the lifting guide mechanisms; the water driving assembly is arranged on the platform main body and can drive the shell to be close to or far 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 and outlet structure, and buoyancy is provided for automatic leveling of the floating plate. Further, the liquid inlet and outlet structure comprises a liquid inlet hole and a liquid outlet hole; The number of the liquid inlets is at least three, and the liquid inlets are uniformly distributed on the bottom plate of the shell around the central axis of the shell; The number of the liquid outlet holes is at least three, and the liquid outlet holes are uniformly distributed on the bottom plate of the shell around the central axis of the shell. Further, the liquid inlet and outlet structure further comprises 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; The upper spring switch assembly comprises spring support plates arranged in the working cavity of the shell, upper springs arranged at the bottoms of the spring support plates and upper sealing heads arranged at the lower ends of the upper springs, and the upper sealing heads are blocked at the upper liquid outlet of the liquid inlet; the number of the lower spring switch assemblies is equal to that of the liquid outlet holes and the lower spring switch assemblies are correspo