A comprehensive disassembly and assembly platform for the absorption ball shutdown system of a high temperature gas-cooled reactor

Abstract

The invention discloses a comprehensive disassembly and assembly platform for a high-temperature gas-cooled reactor absorption ball shutdown system, comprising a main platform, an intermediate platform and a lifting platform. The main platform is fixedly arranged above a driving rod driving mechanism and the absorption ball shutdown system, and a penetrating disassembly and assembly hole is arranged on the main platform; the intermediate platform is fixedly arranged in the disassembly and assembly hole; the fixed end of the lifting platform is fixedly connected to the intermediate platform, and the lifting end of the lifting platform is arranged in a reactor cabin and can move up and down in the reactor cabin; the invention can realize that an operator can descend into the reactor cabin through the lifting platform to maintain the absorption ball shutdown system located in the reactor cabin, so that the operator does not need to stand on the pressure vessel on which the driving rod driving mechanism and the absorption ball shutdown system are installed, and the activity area of ​​the operator can be increased through the lifting platform, so that it is convenient to operate the driving rod driving mechanism and the absorption ball shutdown system.

Description

Technical Field

[0001] The invention relates to the technical field of high temperature gas-cooled reactor nuclear power plants, and in particular to a disassembly and assembly integrated platform for a high temperature gas-cooled reactor absorption ball shutdown system. Background Art

[0002] The absorber ball shutdown system is a key system of the high-temperature gas-cooled reactor. As the second reactivity control system, it plays an auxiliary shutdown role. When used together with the control rod system, it can enable the reactor to reach a lower temperature cold shutdown state.

[0003] The maintenance of the absorber ball shutdown system is an important task and a prerequisite for ensuring the safe operation of the reactor. Before the maintenance of the absorber ball shutdown system, it is necessary to dismantle the absorber ball shutdown system and hoist it to a maintenance site for maintenance. After the maintenance is completed, it will be reinstalled to ensure the normal operation of the high-temperature gas-cooled reactor.

[0004] like Figure 1 and Figure 2 In the structure shown, the absorption ball shutdown system is located on the top cover of the reactor pressure vessel. There are six sets in total, which are arranged in a ring on the top cover of the pressure vessel, forming a circle with a diameter of 1.8m, so the operating space for personnel is small. There are two circles of control panel drive mechanisms on the outside of the absorption ball shutdown system on the top cover of the pressure vessel. The top cover of the pressure vessel is about 4.5m high from the plant platform. In addition, there are many pipelines and cable trays arranged in the reactor compartment, so it is difficult for personnel to reach the operating area of ​​the top cover of the pressure vessel.

[0005] Since the coolant of the high-temperature gas-cooled reactor is high-purity helium, when dismantling and reinstalling the absorber ball shutdown system, the radioactive helium in the reactor is not allowed to diffuse into the environment at will, so as to avoid causing harm to personnel or pollution to the environment. Summary of the invention

[0006] The technical problem to be solved by the present invention is that it is inconvenient to dismantle and reinstall the absorber ball shutdown system at the current stage. The purpose is to provide a comprehensive disassembly and assembly platform for the absorber ball shutdown system of a high-temperature gas-cooled reactor, which solves the problem of dismantling and reinstalling the absorber ball shutdown system in a complex and narrow space without leaking radioactive helium.

[0007] The present invention is achieved through the following technical solutions:

[0008] A comprehensive disassembly and assembly platform for a high temperature gas-cooled reactor absorption ball shutdown system, the high temperature gas-cooled reactor comprising:

[0009] Pressure vessels;

[0010] A driving rod driving mechanism and an absorbing ball shutdown system disposed on the top cover of the pressure vessel;

[0011] The disassembly and assembly integrated platform is arranged above the drive rod drive mechanism and the absorption ball shutdown system, and the disassembly and assembly integrated platform and the plant building constitute a reactor compartment for placing the pressure vessel;

[0012] The disassembly and assembly integrated platform comprises:

[0013] A main platform, which is fixedly arranged above the driving rod driving mechanism and the absorbing ball shutdown system, and a through disassembly hole is arranged on the main platform;

[0014] An intermediate platform, which is fixedly disposed in the disassembly hole;

[0015] A lifting platform has a fixed end and a lifting end, wherein the fixed end of the lifting platform is fixedly connected to the intermediate platform, and the lifting end of the lifting platform is arranged in the reactor compartment and can move up and down in the reactor compartment.

[0016] Optionally, the intermediate platform includes:

[0017] A rectangularly distributed platform frame, wherein the platform frame is fixedly connected to the disassembly and assembly hole;

[0018] a steel cladding connected at one end to the platform frame and at the other end to the lifting platform;

[0019] A protective guardrail is vertically disposed at a position where the steel cladding is not connected to the platform frame.

[0020] Furthermore, a detection platform connected to the intermediate platform is provided in the reactor compartment, and sensors and monitors for detecting the driving rod driving mechanism and the absorbing ball shutdown system are provided on the detection platform.

[0021] As an optional embodiment, the integrated disassembly and assembly platform further includes a lifting assembly, which is fixedly connected to the platform frame, and the lifting assembly includes:

[0022] Longitudinal beams and transverse beams, two longitudinal beams and two transverse beams form a rectangular structure and are arranged directly above the platform frame;

[0023] A vertical beam is arranged vertically, and the upper end of the vertical beam is vertically fixedly connected to the longitudinal beam / the transverse beam, and the lower end of the vertical beam is vertically fixedly connected to the platform frame;

[0024] A lifting trolley, which has a main beam and a traveling device, wherein the main beam is arranged horizontally, and the traveling devices are arranged at both ends of the main beam and are respectively connected to the longitudinal beam, and the lifting trolley can move longitudinally along the longitudinal beam;

[0025] A lifting trolley is dynamically connected to the main beam of the lifting trolley, and the lifting trolley can move laterally along the lifting trolley;

[0026] A lifting elevator is connected to the lifting trolley, and the lifting end of the lifting elevator can penetrate through the platform frame and penetrate into the reactor compartment.

[0027] Specifically, the lifting platform comprises:

[0028] A platform back plate, which is vertically arranged in the reactor compartment and fixedly connected to the intermediate platform through a platform mounting plate, and a screw transmission structure is installed on the platform back plate;

[0029] A platform manned board, which is arranged horizontally, is threadedly connected to the screw of the screw transmission structure, and is driven by the screw transmission structure to move up and down along the platform back plate;

[0030] A platform guardrail, which is vertically arranged at the edge of the platform manned board;

[0031] When the platform manned board is located at the uppermost position, the platform manned board is flush with the steel cladding, and a safety door for closing the steel cladding is provided at the junction of the steel cladding and the platform manned board.

[0032] Optionally, the main platform includes:

[0033] A long platform, which is provided with a straight edge and an arc edge, the two long platforms are symmetrically arranged, and the straight edges of the two long platforms are butted against the two symmetrical straight edges of the middle platform;

[0034] A short platform, which is provided with three straight sides and an arc side, the two short platforms are arranged between the straight sides of the two long platforms and symmetrically arranged on both sides of the middle platform, and the three straight sides of the short platform are respectively connected with the straight sides of the middle platform and the straight sides of the two long platforms;

[0035] Wherein, the arc edge of the long platform and the arc edge of the short platform are connected to the inner side surface of the factory building.

[0036] Specifically, the short platform / long platform includes:

[0037] A load-bearing beam for supporting the main body mechanism, wherein a plurality of the load-bearing beams constitute the frame of the short platform / the long platform; and

[0038] A square covering and a curved covering fixedly arranged on the upper surface of the frame;

[0039] The long platform is provided with a viewing window for observing the interior of the reactor compartment.

[0040] As an optional embodiment, the integrated disassembly and assembly platform further includes:

[0041] An isolation assembly, the lower end of which is sealed and connected to the main platform / the intermediate platform, and the intermediate platform is located inside the isolation assembly;

[0042] The negative pressure component has an air inlet, and the air inlet of the negative pressure component is connected to the interior of the isolation component.

[0043] Specifically, the isolation component includes:

[0044] An isolation frame having four vertical surfaces connected in a rectangular shape, the isolation frame comprising a plurality of horizontally and vertically arranged and fixedly connected steel sections, wherein an airtight door is installed on one of the vertical surfaces;

[0045] An isolation top cover, which is sealed and connected to the upper end of the isolation frame, and the isolation top cover is provided with a flow guide cover for communicating with the air inlet of the negative pressure assembly;

[0046] A plurality of sealing plates, which are fixedly connected to the isolation frame and isolate the inside and outside of the vertical surface of the isolation frame, and some of the sealing plates are transparent plates;

[0047] The lower end of the isolation frame is sealed with the main platform / the intermediate platform, and a guide block for positioning the isolation assembly is provided on the main platform / the intermediate platform.

[0048] Specifically, the negative pressure component includes:

[0049] a primary filter, the inlet of which is in communication with the deflector cover;

[0050] a high efficiency filter, the inlet of which is connected to the outlet of the primary filter;

[0051] The air inlet of the fan is connected to the outlet of the high-efficiency filter through an air pipe, and the outlet of the fan is connected to a designated exhaust gas discharge point.

[0052] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0053] The present invention arranges a main platform and an intermediate platform above the reactor compartment, and installs a liftable lifting platform on the intermediate platform. The lifting platform enables an operator to descend into the reactor compartment to maintain the absorbing ball shutdown system in the reactor compartment. The lifting platform can be used as a manned tool to carry the operator to the top cover of the pressure vessel, and can also be used as an operating table so that the operator does not need to stand on the pressure vessel where the driving rod driving mechanism and the absorbing ball shutdown system are installed. The lifting platform can increase the activity area of ​​the operator, thereby facilitating the operation of the driving rod driving mechanism and the absorbing ball shutdown system.

[0054] At the same time, an isolation component is provided to seal the entire intermediate platform, so that no leakage of radioactive gas occurs when the lifting platform is being lifted or lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0056] Figure 1 It is a schematic diagram of the structure of the high-temperature gas-cooled reactor according to the present invention.

[0057] Figure 2 It is a top view of the high-cooling gas-cooled reactor according to the present invention.

[0058] Figure 3 A side view of a disassembly and assembly integrated platform for a high temperature gas-cooled reactor absorption ball shutdown system according to the present invention

[0059] Figure 4 is a top view of the intermediate platform according to the present invention.

[0060] Figure 5 is a side view of an intermediate platform according to the present invention.

[0061] Figure 6 is a top view of the lifting assembly according to the present invention.

[0062] Figure 7 is a side view of a lifting platform according to the present invention.

[0063] Figure 8 is a bottom view of the long platform according to the present invention.

[0064] Fig. 9 is a top view of the long platform according to the present invention.

[0065] Fig.10is a top view of a short platform according to the present invention.

[0066] Fig.11 is a bottom view of the short platform according to the present invention.

[0067] Fig.12 is a side view of an isolation assembly according to the present invention.

[0068] Fig.13 is a top view of an isolation assembly according to the present invention.

[0069] Fig.14 It is a schematic structural diagram of the negative pressure assembly according to the present invention.

[0070] Fig.15 It is a partial schematic diagram of the main platform according to the present invention.

[0071] Reference numerals: 100 - absorber ball shutdown system, 200 - control rod drive mechanism, 300 - powerhouse, 400 - pressure vessel, 500 - reactor compartment;

[0072] 1-main platform, 2-intermediate platform, 3-lifting platform, 4-lifting assembly, 5-isolation assembly, 6-negative pressure assembly, 7-monitoring platform;

[0073] 10-Long platform, 11-Short platform

[0074] 21- platform frame, 22- steel cladding, 23- guardrail, 24- guide block;

[0075] 31- platform back plate, 32- platform manned plate, 33- platform guardrail, 34- platform mounting plate, 35- safety door;

[0076] 41-longitudinal beam, 42-cross beam, 43-vertical beam, 44-lifting trolley, 45-lifting trolley, 46-lifting lifter;

[0077] 51-isolation frame, 52-transparent plate, 53-sealing plate, 54-airtight door, 55-isolation top cover, 56-flow guide cover;

[0078] 61-primary filter, 62-high efficiency filter, 63-air pipe, 64-fan. DETAILED DESCRIPTION

[0079] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention.

[0080] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0081] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0083] In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0084] like Figure 1 and Figure 2 As shown, the high temperature gas-cooled reactor in the present invention includes a pressure vessel 400 and a drive rod drive mechanism and an absorption ball shutdown system 100.

[0085] The figure shows only a part of the structure of the pressure vessel 400, and the driving rod driving mechanism and the absorption ball shutdown system 100 are both arranged on the top cover of the pressure vessel 400. Six sets of absorption ball shutdown systems 100 are arranged in a ring on the top cover of the pressure vessel 400, forming a circle with a diameter of 1.8m. Multiple sets of driving rod driving mechanisms are arranged on the outside of the absorption ball shutdown system 100, further occupying the space on the top cover of the pressure vessel 400. In addition, there are many pipelines and cable trays arranged in the reactor compartment 500, so it is difficult for personnel to reach the operating area of ​​the top cover of the pressure vessel 400.

[0086] Embodiment 1

[0087] like Figure 3As shown, this embodiment aims to solve the problem of difficult operation, and provides a disassembly and assembly integrated platform for the high-temperature gas-cooled reactor absorption ball shutdown system 100. The disassembly and assembly integrated platform is arranged above the drive rod driving mechanism and the absorption ball shutdown system 100, and the disassembly and assembly integrated platform and the plant 300 constitute a reactor compartment 500 for placing the pressure vessel 400.

[0088] The disassembly and assembly integrated platform comprises a main platform 1, an intermediate platform 2 and a lifting platform 3.

[0089] The main platform 1 is horizontally arranged and fixedly arranged above the driving rod driving mechanism and the absorbing ball shutdown system 100 . A through disassembly hole is arranged on the main platform 1 , and the intermediate platform 2 is fixedly arranged in the disassembly hole.

[0090] The lifting platform 3 has a fixed end and a lifting end. The fixed end of the lifting platform 3 is fixedly connected to the intermediate platform 2, and the lifting end of the lifting platform 3 is arranged in the reactor compartment 500 and can move up and down in the reactor compartment 500. When the lifting end is located at the top, the lifting end is flush with the main platform 1. The operator can walk from the main platform 1 to the lifting end, and then control the lifting platform 3 to move the lifting end downward, and finally lower the lifting end to the operating position. The operator can disassemble and reinstall the absorption ball shutdown system 100 on the lifting platform 3.

[0091] At the same time, a detection platform connected to the middle platform 2 is provided in the reactor compartment 500, and sensors and monitors for detecting the driving rod driving mechanism and the absorption ball shutdown system 100 are provided on the detection platform, and parameters such as temperature monitoring, oxygen concentration monitoring, irradiation dose monitoring, pressure monitoring and video monitoring are detected.

[0092] Embodiment 2

[0093] When operating the absorption ball shutdown system 100 through the lifting platform 3 in the first embodiment, parts need to be replaced. However, due to the large mass of the absorption ball shutdown system 100 parts, the operator cannot directly carry them. During operation, the top of the absorption ball shutdown system 100 disassembly and assembly platform is in a closed state, so the plant 300 crane cannot be activated. In order to solve this problem, an obstacle avoidance lifting device is designed, which can automatically move and lift objects according to the planned path to avoid collision with other surrounding equipment or devices.

[0094] In order to cooperate with the work of the lifting assembly 4, Figure 4 and Figure 5 As shown, the intermediate platform 2 includes a platform frame 21 , a steel cladding 22 and a protective guardrail 23 .

[0095] The rectangular platform frame 21 is fixedly connected to the disassembly and assembly holes, that is, the rectangular platform frame 21 is set as the physical basis of the entire intermediate platform 2, bearing all the weight of the intermediate platform 213, and is welded from steel sections.

[0096] The lifting platform 3 is placed in the middle of the platform frame 21. Therefore, in order to allow the operator to walk to the lifting platform 3, a steel covering 22 is installed in the platform frame 21. One end of the steel covering 22 is connected to the platform frame 21, and the other end is connected to the lifting platform 3.

[0097] In order to prevent pedestrians from falling from other positions, protective guardrails 23 are installed on the other sides of the steel covering 22. The protective guardrails 23 are vertically arranged at the position where the steel covering 22 is not connected to the platform frame 21 to block the operator from walking.

[0098] Through the above structure, there is a gap between the middle platform 2 and the lifting platform 3, and this gap serves as a lifting channel for parts. Therefore, in order to achieve lifting, the disassembly and assembly integrated platform also includes a lifting component 4, which is fixedly connected to the platform frame 21.

[0099] The lifting assembly 4 includes a longitudinal beam 41 , a transverse beam 42 , a vertical beam 43 , a lifting trolley 44 , a lifting trolley 45 and a lifting elevator 46 .

[0100] The two longitudinal beams 41 and the two transverse beams 42 form a rectangular structure and are arranged directly above the platform frame 21 . The longitudinal beams 41 and the transverse beams 42 are fixed by welding.

[0101] The vertical beam 43 is vertically arranged, and the upper end of the vertical beam 43 is vertically fixedly connected to the longitudinal beam 41 / cross beam 42, and the lower end of the vertical beam 43 is vertically fixedly connected to the platform frame 21;

[0102] The lifting trolley 44 has a main beam and a traveling device. The main beam is horizontally arranged, and the traveling device is arranged at both ends of the main beam and is respectively movably connected to the longitudinal beam 41, and the lifting trolley 44 can move longitudinally along the longitudinal beam 41; the lifting trolley 45 is movably connected to the main beam of the lifting trolley 44, and the lifting trolley 45 can move laterally along the lifting trolley 44; the lifting lifter 46 is connected to the lifting trolley 45, and the lifting end of the lifting lifter 46 can pass through the platform frame 21 and penetrate into the reactor compartment 500.

[0103] like Figure 6 As shown, the structure composed of the lifting trolley 44, the lifting car 45 and the lifting elevator 46 can refer to the existing gantry crane. The longitudinal movement can be achieved through the lifting trolley 44, the lateral movement can be achieved through the lifting trolley 45, and the vertical movement can be achieved through the lifting elevator 46.

[0104] Furthermore, through the cooperation of the lifting trolley 44, the lifting cart 45 and the lifting elevator 46, the walking trajectory of the parts located at the lifting end of the lifting elevator 46 can be set so that they can avoid other parts and avoid collisions during the walking process.

[0105] Embodiment 3

[0106] like Figure 5 and Figure 7 As shown, the lifting platform 3 in this embodiment includes a platform backboard 31 , a platform manned board 32 and a platform guardrail 33 .

[0107] The platform back plate 31 is vertically arranged in the reactor compartment 500 and is fixedly connected to the intermediate platform 2 through the platform mounting plate 34. The platform back plate 31 is a sliding track for the platform manned plate 32 and can drive the platform manned plate 32 to move up and down along the platform back plate 31. The platform mounting plate 34 is used to install the special lifting platform 3 to bear the weight of the entire platform.

[0108] In this embodiment, a screw transmission structure is installed on the platform back plate 31, and the motor drives the screw to rotate, so that the rotary motion can be converted into linear motion, and then the platform manned board 32 is horizontally arranged, and the platform manned board 32 is threadedly connected with the screw of the screw transmission structure. The screw transmission structure drives the platform back plate 31 to move up and down, and there is no risk of falling, so the safety is high.

[0109] Meanwhile, in this embodiment, a structure similar to an elevator may be installed on both sides of the platform back plate 31, and the platform manned plate 32 may be moved up and down by the working principle of the elevator.

[0110] In order to prevent the operator from falling from the platform manned board 32 during the up and down movement, the platform guardrail 33 is vertically arranged at the edge of the platform manned board 32;

[0111] When the platform manned board 32 is at the top, the platform manned board 32 is flush with the steel covering 22, and a safety door 35 for closing the steel covering 22 is provided at the junction of the steel covering 22 and the platform manned board 32. The safety door 35 and the platform manned board 32 form a logical relationship, that is, when the platform manned board 32 is not at the top, the safety door 35 is in a closed state to prevent the operator from falling from the lifting platform 3.

[0112] At the same time, a micro switch is arranged below the platform manned board 32. When the micro switch comes into contact with an object or a person, the platform manned board 32 stops moving to avoid the risk of crushing people.

[0113] Embodiment 4

[0114] Generally, the size of the equipment hoisting hole of the reactor building 300 is limited, and the size of the hoisting hole is 5m×5m, so the designed equipment must be able to pass through the hoisting hole. Therefore, in this embodiment, the main platform 1 is divided into multiple modules, such as Fig.15 As shown, the main platform 1 includes a long platform 10 and a short platform 11 .

[0115] The long platform 10 is provided with straight sides and arc sides, and the two long platforms 10 are symmetrically arranged, and the straight sides of the two long platforms 10 are butted against the two symmetrical straight sides of the middle platform 2; the long platform 10 includes a bearing beam and a covering surface.

[0116] The load-bearing beam is used to support the main structure. A plurality of load-bearing beams constitute the frame of the long platform 10 . The square covering surface and the arc-shaped covering surface are fixedly arranged on the upper surface of the frame. The long platform 10 is provided with a visual window hole for observing the interior of the reactor compartment 500 .

[0117] like Figure 8 and Fig. 9 As shown, the long platform 10 is composed of a long platform connecting plate 101, a main bearing beam 102, a long platform short cross beam 103, a long platform ring beam 104, a secondary bearing beam 105, a long platform cross beam 106, a long platform arc-shaped covering 107, a long platform square covering 109, a viewing window 108 and other components.

[0118] The long platform connecting plate 101, the main bearing beam 102, the long platform short beam 103, the long platform ring beam 104, the secondary bearing beam 105, and the long platform beam 106 are connected by welding. The long platform arc-shaped cover 107 and the long platform square cover 109 are welded on the upper surface of the long platform 10 for people to walk on. The visual window 108 is embedded in the cover to play the role of light transmission and observation below. The main bearing beam 102 is the most important load-bearing component of the integrated platform for assembling and disassembling the ball-absorbing shutdown system 100.

[0119] The short platform 11 is provided with three straight sides and an arc side. The two short platforms 11 are both provided between the straight sides of the two long platforms 10 and symmetrically provided on both sides of the middle platform 2. The three straight sides of the short platform 11 are respectively connected with the straight sides of the middle platform 2 and the straight sides of the two long platforms 10, and the arc sides of the long platforms 10 and the arc sides of the short platforms 11 are connected with the inner side of the factory building 300. The short platform 11 includes a bearing beam and a covering. The bearing beam is used to support the main body mechanism, and a plurality of bearing beams constitute the frame of the short platform 11. The square covering and the arc covering are fixedly provided on the upper surface of the frame.

[0120] like Fig.10 and Fig.11 As shown, the short platform 11 is composed of a short platform arc covering 112, a short platform square covering 113, a short platform elongated covering 114, a short platform cross beam 115, a short platform vertical beam 116, a short platform middle cross beam 117, a short platform ring beam 111 and other components.

[0121] The short platform cross beam 115, the short platform vertical beam 116, the short platform middle cross beam 117 and the short platform ring beam 111 are connected by welding, and the short platform arc covering 112, the short platform square covering 113 and the short platform long covering 114 are welded to the upper surface of the short platform 11 for people to walk on.

[0122] In order to realize lifting from the lifting hole, all parts in this embodiment, all parts in the above-mentioned embodiments and all parts in the following embodiments are welded with lifting rings, and the parts can be lifted through the lifting rings, which will not be repeated in all embodiments.

[0123] That is, in this embodiment, the covering is welded on the frame to achieve the sealing and supporting functions, and the specific structure of the frame can be adjusted according to the specific situation so that the frame has the required strength.

[0124] Embodiment 5

[0125] Since the coolant of the high temperature gas-cooled reactor is high purity helium, when disassembling and reinstalling the absorber ball shutdown system 100, the radioactive helium in the reactor is not allowed to diffuse into the environment at will, so as to avoid causing harm to personnel or pollution to the environment.

[0126] In this embodiment, the integrated disassembly and assembly platform is sealed and fixedly connected to the inner side of the plant building 300, so that the reactor compartment 500 components become a relatively sealed space.

[0127] At the same time, in order to avoid leakage of radioactive helium during the use of the lifting platform 3, Fig.12 , Fig.13 As shown, the integrated disassembly and assembly platform also includes an isolation component 5 and a negative pressure component 6.

[0128] The lower end of the isolation assembly 5 is sealed and connected to the main platform 1 / intermediate platform 2, and the intermediate platform 2 is located inside the isolation assembly 5, that is, the lifting assembly connected to the intermediate platform 2 is covered inside the isolation assembly 5, so that no matter whether the lifting platform 3 rises or falls, it will not cause leakage of radioactive gas.

[0129] The negative pressure assembly 6 has an air inlet, and the air inlet of the negative pressure assembly 6 is connected to the interior of the isolation assembly 5. When the absorber ball shutdown system 100 is disassembled and assembled, in order to prevent the radioactive helium in the reactor from diffusing into the environment, it is necessary to maintain a negative pressure in the upper part of the reactor compartment 500, and at the same time, perform multi-stage filtration on the gas in the upper part of the reactor compartment 500 to filter out radioactive dust and particles to avoid environmental pollution and personal injury.

[0130] In this embodiment, the isolation assembly 5 includes an isolation frame 51 , an isolation top cover 55 and a sealing plate 53 .

[0131] The isolation frame 51 has four vertical surfaces connected in a rectangular shape. The isolation frame 51 includes a plurality of horizontally and vertically arranged and fixedly connected steel sections. The steel sections are fixedly connected by welding, and the isolation frame 51 is divided into a three-layer structure by arranging horizontal steel sections. A plurality of sealing plates 53 are fixedly connected to the isolation frame 51, and isolate the inside and outside of the vertical surface of the isolation frame 51. The isolation top cover 55 is sealed and connected to the upper end of the isolation frame 51.

[0132] Through the cooperation of the sealing plate 53 and the isolation top cover 55, the isolation frame 51 becomes a sealable cover body with only the lower end open. The lower end of the isolation frame 51 can be sealed with the main platform 1 / intermediate platform 2 to achieve relative sealing.

[0133] In order to facilitate operators to enter the isolation assembly 5 , an airtight door 54 is installed on one of the vertical surfaces of the isolation frame 51 .

[0134] In order to facilitate the formation of the charge, a deflector 56 for communicating with the air inlet of the negative pressure assembly 6 is provided on the isolation top cover 55;

[0135] For the convenience of observation, part of the sealing plates 53 are set as transparent plates 52 . In practice, the sealing plates 53 at the lower layer can be set as non-transparent, and the sealing plates 53 at the upper two layers can be set as transparent plates 52 .

[0136] A guide block 24 for positioning the isolation assembly 5 is provided on the main platform 1 / intermediate platform 2. If the isolation assembly 5 is larger in structure, the guide block 24 is provided on the main platform 1; if the isolation assembly 5 is similar in size to the intermediate platform 2, the guide block 24 is provided on the intermediate platform 2.

[0137] like Fig.14 As shown, the negative pressure component 6 includes a primary filter 61 , a high efficiency filter 62 and a fan 64 .

[0138] The inlet of the primary filter 61 is connected to the air guide cover 56 through the air pipe 63, the inlet of the high-efficiency filter 62 is connected to the outlet of the primary filter 61 through the air pipe 63, the air inlet of the fan 64 is connected to the outlet of the high-efficiency filter 62 through the air pipe 63, and the outlet of the fan 64 is connected to the designated exhaust gas discharge point.

[0139] The primary filter 61, the high efficiency filter 62 and the fan 64 are connected to form a passage through the air pipe 63, and the gas inside the whole device is sucked, and then discharged to a designated place after two-stage filtering.

[0140] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0141] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0142] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A comprehensive disassembly and assembly platform for a high temperature gas-cooled reactor absorption ball shutdown system (100), characterized in that: High temperature gas-cooled reactor includes: A pressure vessel (400); A driving rod driving mechanism and an absorbing ball shutdown system (100) arranged on the top cover of the pressure vessel (400); The integrated disassembly and assembly platform is arranged above the drive rod driving mechanism and the absorption ball shutdown system (100), and the integrated disassembly and assembly platform and the plant (300) form a reactor compartment (500) for placing the pressure vessel (400); The disassembly and assembly integrated platform comprises: A main platform (1) is fixedly arranged above the driving rod driving mechanism and the absorbing ball shutdown system (100), and a through disassembly hole is arranged on the main platform (1); An intermediate platform (2) fixedly disposed in the disassembly hole; A lifting platform (3) having a fixed end and a lifting end, wherein the fixed end of the lifting platform (3) is fixedly connected to the intermediate platform (2), and the lifting end of the lifting platform (3) is arranged in the reactor compartment (500) and can move up and down in the reactor compartment (500).

2. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 1, characterized in that: The intermediate platform (2) comprises: A rectangularly distributed platform frame (21), wherein the platform frame (21) is fixedly connected to the disassembly hole; A steel cladding (22) connected at one end to the platform frame (21) and at the other end to the lifting platform (3); A protective guardrail (23) is vertically arranged at a position where the steel cladding (22) is not connected to the platform frame (21).

3. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 2, characterized in that: A detection platform connected to the intermediate platform (2) is arranged in the reactor compartment (500), and a sensor and a monitor for detecting the drive rod driving mechanism and the absorbing ball shutdown system (100) are arranged on the detection platform.

4. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 2, characterized in that: It also includes a lifting assembly (4) which is fixedly connected to the platform frame (21), and the lifting assembly (4) includes: A longitudinal beam (41) and a cross beam (42), wherein two longitudinal beams (41) and two cross beams (42) form a rectangular structure and are arranged directly above the platform frame (21); A vertical beam (43) is vertically arranged, and the upper end of the vertical beam (43) is vertically fixedly connected to the longitudinal beam (41) / the cross beam (42), and the lower end of the vertical beam (43) is vertically fixedly connected to the platform frame (21); A lifting trolley (44) having a main beam and a traveling device, wherein the main beam is arranged horizontally, and the traveling devices are arranged at both ends of the main beam and are respectively movably connected to the longitudinal beam (41), and the lifting trolley (44) can move longitudinally along the longitudinal beam (41); A lifting trolley (45) is dynamically connected to the main beam of the lifting trolley (44), and the lifting trolley (45) can move laterally along the lifting trolley (44); A lifting elevator (46) is connected to the lifting trolley (45), and the lifting end of the lifting elevator (46) can pass through the platform frame (21) and penetrate into the reactor compartment (500).

5. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 2, characterized in that: The lifting platform (3) comprises: a platform back plate (31), which is vertically arranged in the reactor compartment (500) and fixedly connected to the intermediate platform (2) via a platform mounting plate (34); a screw transmission structure is installed on the platform back plate (31); A platform manned board (32) is arranged horizontally, the platform manned board (32) is threadedly connected to the screw of the screw transmission structure, and is driven by the screw transmission structure to move up and down along the platform backboard (31); A platform guardrail (33) vertically arranged on the edge of the platform manned board (32); When the platform manned plate (32) is located at the top, the platform manned plate (32) is flush with the steel cladding (22), and a safety door (35) for closing the steel cladding (22) is provided at the junction of the steel cladding (22) and the platform manned plate (32).

6. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 2, characterized in that: The main platform (1) comprises: A long platform (10) having a straight edge and an arc edge, wherein the two long platforms (10) are symmetrically arranged, and the straight edges of the two long platforms (10) are butted against the two symmetrical straight edges of the middle platform (2); A short platform (11) having three straight sides and an arc side, wherein the two short platforms (11) are arranged between the straight sides of the two long platforms (10) and symmetrically arranged on both sides of the middle platform (2), and the three straight sides of the short platform (11) are respectively connected to the straight sides of the middle platform (2) and the straight sides of the two long platforms (10); The arc edge of the long platform (10) and the arc edge of the short platform (11) are connected to the inner side surface of the factory building (300).

7. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 6, characterized in that: The short platform (11) / long platform (10) comprises: A load-bearing beam for supporting the main body mechanism, wherein a plurality of the load-bearing beams constitute the frame of the short platform (11) / the long platform (10); and A square covering and a curved covering fixedly arranged on the upper surface of the frame; The long platform (10) is provided with a viewing window hole for observing the interior of the reactor compartment (500).

8. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 1, characterized in that: Also includes: An isolation component (5), the lower end of which is sealed and connected to the main platform (1) / the intermediate platform (2), and the intermediate platform (2) is located inside the isolation component (5); A negative pressure component (6) has an air inlet, and the air inlet of the negative pressure component (6) is connected to the interior of the isolation component (5).

9. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 8, characterized in that: The isolation component (5) comprises: An isolation frame (51) having four vertical surfaces connected in a rectangular shape, the isolation frame (51) comprising a plurality of horizontally and vertically arranged and fixedly connected steel sections, wherein an airtight door (54) is installed on one of the vertical surfaces; An isolation top cover (55) is sealed and connected to the upper end of the isolation frame (51), and a flow guide cover (56) is provided on the isolation top cover (55) for communicating with the air inlet of the negative pressure assembly (6); A plurality of sealing plates (53) which are fixedly connected to the isolation frame (51) and isolate the inside and outside of the vertical surface of the isolation frame (51), and some of the sealing plates (53) are transparent plates (52); The lower end of the isolation frame (51) is sealed to the main platform (1) / the intermediate platform (2), and a guide block (24) for positioning the isolation assembly (5) is provided on the main platform (1) / the intermediate platform (2).

10. The integrated disassembly and assembly platform of the high temperature gas-cooled reactor absorption ball shutdown system (100) according to claim 9, characterized in that: The negative pressure component (6) comprises: A primary filter (61), an inlet of which is in communication with the flow guide cover (56); a high efficiency filter (62), the inlet of which is connected to the outlet of the primary filter (61); The air inlet of the fan (64) is connected to the outlet of the high-efficiency filter (62) through the air pipe (63), and the outlet of the fan (64) is connected to the designated exhaust gas discharge point.

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