Containment inner dome cleaning device and containment

Abstract

A containment inner dome cleaning device disclosed by the present invention comprises an annular rail and a cleaning assembly, the cleaning assembly comprises a connecting arm and a nozzle, the annular rail is installed at the top position of the inner surface of a containment shell and is arranged along the annular trend surrounding the vertical axis of the containment shell, one end of the connecting arm is movably connected to the annular rail, and the other end of the connecting arm is movably connected to the nozzle. And the nozzle can be driven to move along the circular track, so that the spraying range of the nozzle covers the dome of the inner shell of the containment. The cleaning device for the dome in the containment is reasonable in structural arrangement, the cleaning efficiency is improved, the safety, flexibility and adaptability of cleaning operation are ensured, the cleaning requirements of different structures can be effectively met, and meanwhile the strict safety and operation standards of a nuclear power station are met. The invention also provides the containment.

Description

Technical Field

[0001] The invention specifically relates to a dome cleaning device in a containment shell and the containment shell. Background Art

[0002] In the nuclear industry, especially in the operation and maintenance of nuclear power plants, the steel containment dome is a key protective structure that is mainly used to undertake multiple functions including heat dissipation to ensure the safe operation of nuclear power plants. If the dome surface is not cleaned for a long time, the accumulated dust, dirt and other external substances may affect the structural integrity and function of the dome, such as affecting its heat dissipation performance, affecting heat extraction and reducing safety margins.

[0003] Since the inner shell of the containment is located inside the outer shell, the inner dome is blocked and space is limited, making cleaning more difficult. Traditional cleaning methods for steel containment domes mainly rely on manual operation and simple mechanical assistance, which are obviously insufficient in safety, efficiency and thoroughness of cleaning. Regarding the cleaning of steel containment domes, there are currently the following main methods: Some types of containment cleaning methods are mainly cleaned by water gravity, which can reduce energy consumption and operational complexity to a certain extent. However, water gravity cleaning may be difficult to effectively clean all areas on the dome, especially for areas with complex structures or difficult to cover with water flow. In these cases, manual cleaning may also be required, and manual cleaning is dangerous, especially in high altitude or radiation environments, where the safety of operators is difficult to guarantee. In addition, manual cleaning is inefficient and costly, and the cleaning quality may be inconsistent due to human factors. There are also some cleaning methods that add fixed nozzles during design, which can achieve regular automatic cleaning of the steel containment dome, but this cleaning method has dead zones, that is, areas that are difficult for the nozzles to cover, which may also lead to problems of incomplete cleaning. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a dome cleaning device in a containment shell in view of the above-mentioned deficiencies in the prior art. The device has a reasonable structure, improves cleaning efficiency, ensures the safety of cleaning operations, has strong flexibility and adaptability, can effectively adapt to the cleaning needs of different structures, and meets the strict safety and operation standards of nuclear power plants. The present invention also provides a containment shell.

[0005] The present invention provides a device for cleaning the dome inside a containment shell, comprising a ring rail and a cleaning assembly, wherein the cleaning assembly comprises a connecting arm and a nozzle, wherein the ring rail is installed at the top position of the inner surface of the outer shell of the containment shell and is arranged along a ring direction surrounding the vertical axis of the containment shell, wherein one end of the connecting arm is movably connected to the ring rail, and the other end is connected to the nozzle, and the nozzle can be driven to move along the ring rail so that the spraying range of the nozzle covers the dome inside the containment shell.

[0006] Furthermore, the connecting arm includes a telescopic mechanism and a first rotating mechanism. The telescopic mechanism is a rod-shaped structure and can be telescoped along the axial direction. There are multiple telescopic mechanisms, and the telescopic mechanisms are connected in sequence end to end, and adjacent ends are connected by a first rotating mechanism. The first rotating mechanism can adjust the axial angle between the two connected telescopic mechanisms.

[0007] Furthermore, the connecting arm and the nozzle are connected via a second rotating mechanism, and the second rotating mechanism can drive the nozzle to rotate around the axial direction of the connecting arm.

[0008] Furthermore, the cleaning component also includes a mobile platform, which is connected between the connecting arm and the ring rail. The mobile platform includes a support frame, walking wheels and a walking drive component. The connecting arm is connected to the support frame, and the walking wheels are rotatably connected to the support frame and can roll along the ring rail. The driving end of the walking drive component is connected to the walking wheel, and the driving wheel drives the support frame, the connecting arm and the nozzle to move along the ring rail.

[0009] Furthermore, the horizontal plane where the ring track is located is located above the apex of the dome of the containment inner shell, and the cylindrical area between the slope of the top of the inner surface of the containment outer shell and the dome of the containment inner shell serves as the active area for the connecting arm to move along the ring track.

[0010] Furthermore, the cleaning components are provided in multiple groups, and each group of cleaning components is connected to the ring rail.

[0011] Furthermore, the dome cleaning device in the containment also includes a cleaning liquid supply assembly, which includes a pump, a supply device and a pipeline. The pipeline sequentially connects the supply device, the pump and the nozzle. Under the drive of the pump, the cleaning liquid supplied by the supply device is sent to the nozzle.

[0012] Furthermore, the supply equipment includes a water source, a cleaning liquid storage device and a liquid dispensing device, the liquid dispensing device is connected to the inlet of the pump, and the two inlets of the liquid dispensing device are respectively connected to the water source and the cleaning liquid storage device for adjusting the intake of water and cleaning liquid.

[0013] The present invention also provides a containment, comprising an inner shell, an outer shell and the above-mentioned containment inner dome cleaning device, wherein the ring track of the containment inner dome cleaning device is installed at the top position of the inner surface of the outer shell, so that the connecting arm can drive the nozzle to move along the ring track, so that the spray range covers the inner shell dome of the containment. The present invention also provides a containment, comprising an inner shell, an outer shell and the above-mentioned containment inner dome cleaning device, wherein the ring track of the containment inner dome cleaning device is installed at the top position of the inner surface of the outer shell, so that the connecting arm can drive the nozzle to move along the ring track, so that the spray range covers the inner shell dome of the containment.

[0014] The device for cleaning the dome inside the containment of the present invention is installed between the outer shell and the inner shell of the containment, wherein the cleaning assembly moves along a ring track, and the ring track is installed at the top position of the inner surface of the outer shell of the containment, and is arranged along a ring direction surrounding the vertical axis of the containment, so that the connecting arm can drive the nozzle to move along this direction, so that the spray range of the nozzle covers the dome of the inner shell of the containment. This device is arranged at the top of the inner surface of the outer shell, and the arrangement position is ingenious, which makes full use of the structural characteristics of the containment itself, forming a running track around the circumference of the inner shell, and not directly contacting the dome to be cleaned, so that the cleaning assembly itself will not block the cleaning position, so it will not affect the spray coverage range of the cleaning liquid, and will not cause the device itself to be affected by the cleaning liquid. At the same time, through the design of the ring track and the movable nozzle, comprehensive coverage and cleaning of the inner dome is achieved, and the flexibility and adaptability are stronger.

[0015] Avoiding human operation not only improves cleaning efficiency, but also ensures the safety of cleaning operations and meets the strict safety and operating standards of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the installation position of the dome cleaning device in the containment vessel in Example 1 of the present invention;

[0017] Figure 2 1 is a schematic diagram of the structure of the dome cleaning device in the containment in Example 1 of the present invention;

[0018] Figure 3 It is a schematic diagram of the connecting arm of the dome cleaning device in the containment in Example 1 of the present invention.

[0019] In the figure: 1, ring rail; 2, connecting arm; 21, telescopic mechanism; 211, connecting rod; 22, first rotating mechanism; 23, third rotating mechanism; 3, nozzle; 31, second rotating mechanism; 4, moving platform. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0022] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, the device for cleaning the dome inside the containment vessel of the present embodiment comprises a ring rail 1 and a cleaning assembly, wherein the cleaning assembly comprises a connecting arm 2 and a nozzle 3, wherein the ring rail 1 is installed at the top position of the inner surface of the outer shell of the containment vessel and is arranged along a ring direction surrounding the vertical axis of the containment vessel, wherein one end of the connecting arm 2 is movably connected to the ring rail 1, and the other end is connected to the nozzle 3, and can drive the nozzle 3 to move along the ring rail 1 so that the spraying range of the nozzle 3 covers the dome inside the containment vessel. This device is arranged on the top of the inner surface of the outer shell, and its layout is ingenious. It makes full use of the structural characteristics of the containment itself. It not only forms a running track around the circumference of the inner shell, but also does not directly contact the dome to be cleaned. Therefore, the cleaning component itself will not block the cleaning position. Therefore, it will not affect the spray coverage of the cleaning liquid, and will not cause the device itself to be affected by the cleaning liquid. At the same time, through the design of the ring track 1 and the movable nozzle 3, the special requirements of the inner dome cleaning work are met, breaking through the limitations of traditional cleaning methods, and realizing comprehensive coverage cleaning of the inner dome. It has stronger flexibility and adaptability, avoids human operation, not only improves the cleaning efficiency, but also ensures the safety of the cleaning operation, meets the strict safety and operation standards of nuclear power plants, and can effectively adapt to the cleaning needs of different structures.

[0026] In this embodiment, the connecting arm 2 includes a telescopic mechanism 21 and a first rotating mechanism 22. The telescopic mechanism 21 is a rod-shaped structure and can be telescopic along the axial direction. There are multiple telescopic mechanisms 21, and each telescopic mechanism 21 is connected in sequence end to end, and the adjacent ends are connected by the first rotating mechanism 22. The first rotating mechanism 22 can adjust the axis angle between the two connected telescopic mechanisms 21. Through this setting structure, the connecting arm 2 can achieve both telescopic and shape adjustment, thereby not only expanding the reachable range of the nozzle 3, but also adjusting the distance between the nozzle 3 and the inner dome, so that the nozzle 3 can easily bypass the components on the inner dome and perform more detailed and comprehensive cleaning.

[0027] Specifically, Figure 2 and Figure 3 As shown, in this embodiment, the telescopic mechanism 21 can be provided with two connecting rods 211 that are sleeved with each other. The two connecting rods 211 can realize the axial telescopic extension of the entire telescopic mechanism 21 by extending or retracting. A telescopic drive unit can be provided inside the connecting rod 211. This telescopic drive unit can adopt a linear drive device such as a hydraulic cylinder, a pneumatic cylinder, an electric push rod, etc. In this embodiment, a motor is used as a telescopic drive unit, which is responsible for the telescopic action of the connecting rod 211, wherein the motor can be built into a connecting rod 211, and a screw is connected to the driving end. The screw thread is sleeved with a nut, and the nut is connected to another connecting rod 211 (the inner connecting rod 211 connected to the nut is sleeved inside the outer connecting rod 211 where the motor is set). When the motor rotates, the screw rotates synchronously. The rotation of the screw is meshed with the nut through the thread, and the rotational motion of the screw is converted into the linear motion of the nut, so that the connecting rod 211 moves with the nut to realize the telescopic action.

[0028] Of the two adjacent telescopic mechanisms 21, the outer connecting rod 211 of the telescopic mechanism 21 near the nozzle 3 is connected to the end of the inner connecting rod 211 of the telescopic mechanism 21 near the ring track 1, and the two are hingedly connected. The hinged rotating shaft is driven by a servo motor as the first rotating mechanism 22, which can cooperate with a precise control system to control the relative angle between the telescopic mechanisms 21. The servo motor controls the rotation angle of each hinge to achieve the adjustment of the overall spatial position and orientation of the telescopic mechanism 21. The connecting rod 211 is responsible for adjusting the overall length of the cleaning device, and the first rotating mechanism 22 is responsible for adjusting the angle. The two cooperate with each other to perform all-round cleaning of the inner dome.

[0029] In this embodiment, the connecting arm 2 and the nozzle 3 are connected by a second rotating mechanism 31, and the second rotating mechanism 31 can drive the nozzle 3 to rotate around the axial direction of the connecting arm 2 (the telescopic mechanism 21 connected to the nozzle 3). This arrangement allows the nozzle 3 to rotate 360 ​​degrees in a horizontal plane (or a plane perpendicular to the axis of the telescopic mechanism 21). In addition, Figure 2 As shown, the connecting arm 2 and the mobile platform 4 can also be connected via a third rotating mechanism 23. The second rotating mechanism 31 and the third rotating mechanism 23 are similar in structure to the first rotating mechanism 22, and a servo motor is used to drive the rotating shaft to rotate to achieve angle adjustment.

[0030] In this embodiment, the dome cleaning device in the containment also includes a control system. The rotating shafts of the first rotating mechanism 22, the second rotating mechanism 31 and the third rotating mechanism 23 can be provided with angular displacement sensors, rotary encoders or absolute value encoders, etc., which can sense the rotation angle position of the rotating shaft. When the spray angle needs to be adjusted, the control system can obtain the required rotation angle according to the real-time position feedback from each sensor and the required angle position, and send the required rotation angle to each servo motor through a signal, so that the output shaft of the servo motor drives each rotating shaft to rotate, so as to achieve spraying on any part of the inner dome. Similarly, a position sensor or other sensor for sensing the telescopic length of the telescopic mechanism 21 can also be provided on the motor built into each telescopic mechanism 21 or on the connecting rod 211. When the length of the connecting arm 2 needs to be adjusted, the control system can obtain the required telescopic amount according to the real-time length feedback from each sensor and the required length position, and send the telescopic amount to each telescopic mechanism 21 motor through a signal, so that the motor output shaft drives each telescopic mechanism 21 to telescope.

[0031] In this embodiment, the cleaning component also includes a mobile platform 4, which is connected between the connecting arm 2 and the ring track 1. The mobile platform 4 includes a support frame (or a support structure), a walking wheel (or a wheel system) and a walking drive member. The connecting arm 2 is connected to the support frame, and the walking wheel is rotatably connected to the support frame and can roll along the ring track 1. The driving end of the walking drive member is connected to the walking wheel, and the driving walking wheel drives the support frame, the connecting arm 2 and the nozzle 3 to move along the ring track 1. The walking wheel and the ring track 1 can adopt a conventional interlocking connection method, that is, the mobile platform 4 can be kept on the ring track 1 without affecting the walking. This interlocking connection method is common in various track matching structures and will not be described here.

[0032] The support frame provides a stable physical platform for installing and supporting the connecting arm 2 and the nozzle 3, and can be made of steel or high-strength alloy materials; the travel drive may include a motor and its associated transmission machinery (such as a gear box), which is responsible for driving the mobile platform 4 to move along the circular track 1; the wheel system ensures the stable movement and guidance of the mobile platform 4 on the circular track 1; a position sensor (encoder or magnetic sensor) can be set on the support frame to sense the real-time position of the cleaning component, and the control system can drive the position of the mobile platform 4 by controlling the travel drive according to the real-time position of the cleaning component and the target position, and can also integrate advanced feedback mechanisms to achieve automatic control and fault diagnosis.

[0033] In this embodiment, the cables of various sensors, motors, servo motors and other components are managed and protected by a retractable cable chain system to ensure that they will not be stretched, kinked or worn when the connecting arm 2 performs various actions. In addition, a slip ring can be installed at the rotation interface between the mobile platform 4 and the connecting arm 2 to further adapt the rotation of the connecting arm 2, allowing the connecting arm 2 to rotate freely without restriction. All cables are wrapped in wear-resistant and high-temperature resistant protective sleeves (such as gooseneck tubes, drag chains, etc., which are conventional structures on the market and are not described here) to ensure the integrity of the cables and the safety of operation.

[0034] In this embodiment, the horizontal plane where the ring track 1 is located is located above the apex of the dome of the inner shell of the containment, and the cylindrical area between the slope of the top of the inner surface of the outer shell of the containment and the dome of the inner shell of the containment serves as the movable area for the connecting arm 2 to move along the ring track 1. This cylindrical movable area is in the shape of a trumpet with an opening gradually increasing from top to bottom, which is adapted to the structure of the inner dome of the containment to avoid interference between the movable range of the connecting arm 2 and the inner dome.

[0035] In this embodiment, multiple groups of cleaning components are provided, and each group of cleaning components is connected to the ring track 1. Each group of cleaning components is symmetrically arranged and evenly distributed on the ring track 1. According to the specific size and structural characteristics of the containment, the number of cleaning components and the intervals between them can be adjusted as needed to maximize the cleaning effect.

[0036] In this embodiment, the dome cleaning device in the containment also includes a cleaning liquid supply component, which includes a pump, a supply device and a pipeline. The pipeline connects the supply device, the pump and the nozzle 3 in sequence. Under the drive of the pump, the cleaning liquid supplied by the supply device is sent to the nozzle 3.

[0037] In this embodiment, the supply equipment includes a water source, a cleaning liquid storage device and a liquid dispensing device. At the inlet of the pump, the two inlets of the liquid dispensing device are respectively connected to the water source and the cleaning liquid storage device for adjusting the amount of water and cleaning liquid. The liquid dispensing device can mix water and cleaning agent according to a preset ratio to form a cleaning liquid suitable for different cleaning needs. The water source can come from a water storage tank of a water fire fighting system in the nuclear island, or an external mobile water truck. The liquid dispensing device can specifically include two valve bodies arranged on the water source outlet pipeline and the cleaning liquid storage device outlet pipeline, and the water source and the cleaning liquid intake are adjusted by adjusting the opening of the valve body. It can also further include a mixing chamber so that the water source and the cleaning liquid are fully mixed. In this embodiment, a chemical sensor or a pH sensor can also be installed at the outlet of the liquid dispensing device or on a pipeline near the nozzle 3 as a liquid feed sensor. It is used to monitor the concentration and pH value of the set chemical components in the mixed liquid in real time to ensure that the chemical properties meet the cleaning standards. The control system adjusts the opening of the two valve bodies of the liquid dispensing device according to the numerical value fed back by the liquid feed sensor to achieve adjustment.

[0038] In this embodiment, pressure sensors (electronic pressure sensors) can also be set at key pipeline nodes, such as the supply equipment outlet, pump inlet and near the nozzle, to monitor the pressure of the cleaning fluid in the pipeline system; a liquid level sensor can be set inside the water tank of the supply equipment to monitor the liquid level in the water tank to ensure that the supply equipment has sufficient supply of cleaning fluid.

[0039] When not in use, all telescopic mechanisms 21 of the cleaning device are in a fully retracted state. A camera can also be installed at the end of the cleaning device to capture the image of the dome inside the containment vessel for detecting and evaluating the degree of contamination. The control system can integrate an image recognition module, which automatically or manually formulates a cleaning plan based on the pollution identification results, including selecting a suitable cleaning agent, setting the movement trajectory of the nozzle, setting parameters to adjust the injection pressure and angle, etc. After cleaning, use the camera again to evaluate the cleaning effect. If the expected effect is not achieved, adjust the cleaning parameters or repeat the cleaning process. In general, the device of this embodiment mainly includes a cleaning mechanical device, a cleaning liquid supply component and a related control system. Among them:

[0040] (1) The cleaning mechanical device is the core device of the device, and mainly includes the following components: a motor, a telescopic arm (i.e., a connecting arm 2), a mobile platform 4, a ring rail 1 and a rotating nozzle 3.

[0041] The circular track 1 provides a stable track for guiding the mobile platform 4 to move along a predetermined path. The design of the circular track 1 ensures that the cleaning device can reach every part of the inner dome.

[0042] Mobile platform 4: The mobile platform 4 serves as a base for carrying the telescopic arm and the rotating nozzle 3, and is positioned and moved along the circular track 1 to ensure that the cleaning device can cover the entire surface of the inner dome.

[0043] Telescopic arm: The telescopic arm is used to extend the rotating nozzle 3 from the mobile platform 4 to the surface of the inner dome. The length and angle can be adjusted to adapt to different cleaning areas and needs. The telescopic arm is installed on the mobile platform 4, and the end thereof is connected to the rotating nozzle 3.

[0044] Rotating nozzle 3: Rotating nozzle 3 is responsible for spraying cleaning liquid and doing the actual cleaning work. It can rotate and adjust the spray angle to achieve comprehensive cleaning of the inner dome surface. Rotating nozzle 3 is located at the end of the telescopic arm, and through the adjustment of the telescopic arm, it can approach and cover different areas of the inner dome.

[0045] Motor: The motor is the power source of the cleaning device, responsible for driving the mobile platform 4 to move along the ring track, controlling the extension and retraction of the telescopic arm and the rotation of the rotary nozzle 3. The motor can be installed on the mobile platform 4 and directly connected to the components that need to be driven by power.

[0046] The above components cooperate with each other to form an efficient cleaning mechanical device, which can flexibly adapt to the complex internal structure of the nuclear power plant and realize efficient and safe cleaning operations. The cleaning components formed by the mobile platform 4, the motor, the telescopic arm and the rotating nozzle 3 can be set in multiple numbers and evenly arranged on the ring track 1 to improve the cleaning efficiency.

[0047] (2) The cleaning fluid supply components include a pump, a water source, pipes and valves.

[0048] The water source of the cleaning liquid supply component can be selected from the water storage of the fire water system inside the nuclear power plant or a mobile water truck. When the fire water system inside the nuclear power plant is directly used as the supply source of the cleaning liquid (i.e., the supply equipment): When this method is adopted, the method of adding the cleaning agent needs to be considered. Method 1: Design a special liquid dispensing device on the pipeline between the fire water source and the cleaning system (i.e., the cleaning mechanical device or the cleaning component) to accurately mix the cleaning agent into the water provided by the fire system. Method 2: A proportional pump is often set between the output end of the fire system and the input end of the cleaning system (i.e., the cleaning mechanical device or the cleaning component) (the input end of the cleaning component is actually the input end of the nozzle 3) to directly inject the cleaning agent into the flowing water. Mobile water truck: Use a mobile water truck as the supply source of the cleaning liquid (i.e., the supply equipment), and mix the cleaning agent in the water tank in advance. This method has good flexibility and mobility.

[0049] Pump: A high-pressure pump can be installed to provide the required pressure and flow for the cleaning system, and is used to transport the cleaning liquid from the water storage end (i.e., the water source and other supply equipment) to the cleaning nozzle 3. Existing pump facilities in the nuclear power plant, such as the pump in the cooling system, can also be used to reduce the demand for additional pump equipment and save costs.

[0050] Pipes and valves: Arrange a set of pipe systems to connect the water tank, pump and cleaning nozzles, and control the flow direction and flow of the cleaning liquid through valves. Select corrosion-resistant and high-pressure resistant pipe materials to adapt to the properties of the cleaning liquid and the pressure requirements of the system. Install control valves on the main pipeline of the cleaning liquid supply system to start or stop the cleaning process. Install control valves on the pipes that branch to each cleaning nozzle to control the cleaning of a single nozzle. Set a check valve and a safety valve at the outlet of the pump. In addition, if the injection of cleaning agent is included in the system design, a valve should be installed at the injection port to control the amount and time of the cleaning agent. Install isolation valves at the water supply inlet and wastewater outlet of the system to facilitate system maintenance and rapid isolation in emergency situations.

[0051] (3) Control system: including manual control panel and / or automated control software, used to accurately control each link in the cleaning process, such as starting and stopping the pump, opening and closing the valve, extending and extending the telescopic arm and its angle, rotating the nozzle and moving the mobile platform, etc.

[0052] Sensors and monitoring equipment: Install several sensors to monitor the cleaning process in real time. Install pressure sensors at the pump outlet, the inlet and outlet of the cleaning fluid supply system, and key pipeline nodes, and set up liquid level sensors inside the water tank; install position sensors on the mobile platform to monitor its position along the circular track; set up position sensors at the joints of the telescopic arm to monitor its extension state. Set up an angle sensor on the rotating axis of the rotating nozzle to monitor the rotation angle of the rotating nozzle. In addition, if chemical cleaning agents are used in the cleaning system, it is necessary to monitor the chemical composition and pH value of the cleaning fluid.

[0053] The device of this embodiment can be used in the nuclear industry, which is equivalent to providing a dome cleaning equipment for steel containment vessels in key nuclear energy facilities such as nuclear power plants to meet the special cleaning needs of the internal environment of nuclear power plants, achieving 360° all-round cleaning without dead ends, and significantly improving cleaning efficiency and coverage.

[0054] The device mainly includes a circular track (circular track 1) installed along the inner side of the shell, a platform (mobile platform 4) that can move along the track, an adjustable telescopic arm (connecting arm 2) extending from the platform, and a rotating nozzle 3 installed at the end of the telescopic arm. The cleaning device achieves comprehensive coverage and cleaning of the inner dome through the design of the circular track 1 and the mobile platform 4. At the same time, the flexibility of the telescopic arm and the rotating nozzle 3 ensures that there are no dead angles during the cleaning process. In order to support the cleaning operation, the present embodiment also includes a cleaning liquid supply component, which provides flexible configuration options to adapt to different operating environments. In addition, a control system is added to the device to monitor the cleaning process in real time to ensure the safety and effectiveness of the operation.

[0055] This embodiment not only improves the efficiency and safety of cleaning operations for the steel containment dome of a nuclear power plant, but also reduces the direct involvement of personnel in cleaning operations in high-risk environments through flexible design and high automation, thereby providing an efficient, safe and reliable solution for cleaning the steel containment dome of a nuclear power plant.

[0056] Example 2

[0057] The containment shell of this embodiment includes an inner shell, an outer shell and the containment shell inner dome cleaning device in Example 1. The ring track 1 of the containment shell inner dome cleaning device is installed at the top position of the inner surface of the inner shell, so that the connecting arm 2 can drive the nozzle 3 to move along the ring track 1, so that the spray range covers the containment shell inner dome.

[0058] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A dome cleaning device in a containment vessel, characterized in that: It comprises a ring rail (1) and a cleaning assembly, wherein the cleaning assembly comprises a connecting arm (2) and a nozzle (3). The ring rail (1) is installed at the top position of the inner surface of the containment shell and is arranged along a ring direction surrounding the vertical axis of the containment shell. One end of the connecting arm (2) is movably connected to the ring rail (1), and the other end is connected to the nozzle (3), which can drive the nozzle (3) to move along the ring rail (1) so that the spraying range of the nozzle (3) covers the dome of the inner shell of the containment vessel.

2. The device for cleaning the dome in the containment vessel according to claim 1, characterized in that: The connecting arm (2) comprises a telescopic mechanism (21) and a first rotating mechanism (22). The telescopic mechanism (21) is a rod-shaped structure and can be telescopically extended and retracted in the axial direction. A plurality of telescopic mechanisms (21) are provided, and the telescopic mechanisms (21) are connected end to end in sequence, and adjacent ends are connected via a first rotating mechanism (22). The first rotating mechanism (22) is capable of adjusting the axis angle between the two connected telescopic mechanisms (21).

3. The dome cleaning device in the containment vessel according to claim 1, characterized in that: The connecting arm (2) and the spray head (3) are connected via a second rotating mechanism (31), and the second rotating mechanism (31) can drive the spray head (3) to rotate around the axial direction of the connecting arm (2).

4. The dome cleaning device in the containment vessel according to claim 1, characterized in that: The cleaning assembly further comprises a moving platform (4), wherein the moving platform (4) is connected between the connecting arm (2) and the ring rail (1). The mobile platform (4) comprises a support frame, walking wheels and a walking drive member, and the connecting arm (2) is connected to the support frame. The running wheels are rotatably connected to the support frame and can roll along the circular track (1). The driving end of the travel drive member is connected to a travel wheel, and the travel wheel drives the support frame, the connecting arm (2) and the nozzle (3) to move along the circular track (1).

5. The dome cleaning device in the containment vessel according to claim 1, characterized in that: The horizontal plane where the ring track (1) is located is located above the apex of the dome of the containment inner shell. The cylindrical area between the sloped surface at the top of the inner surface of the containment shell outer shell and the dome of the containment shell inner shell serves as the movable area for the connecting arm (2) to move along the ring track (1).

6. The device for cleaning the dome in a containment vessel according to any one of claims 1 to 4, characterized in that: The cleaning components are provided in multiple groups, and each group of cleaning components is connected to the ring rail (1).

7. The device for cleaning the dome in the containment vessel according to claim 1, characterized in that: It also includes a cleaning liquid supply assembly, which includes a pump, a supply device and a pipeline. The pipeline is connected to the supply device, the pump and the nozzle (3) in sequence, and the cleaning liquid supplied by the supply device is sent to the nozzle (3) under the drive of the pump.

8. The device for cleaning the dome in the containment vessel according to claim 7, characterized in that: The supply equipment includes a water source, a cleaning liquid storage device and a liquid dispensing device. The liquid dispensing device is connected to the inlet of the pump. The two inlets of the liquid dispensing device are respectively connected to the water source and the cleaning liquid storage device for adjusting the intake of water and cleaning liquid.

9. A containment vessel, characterized in that: The invention comprises an inner shell, an outer shell and a dome cleaning device in a containment vessel as claimed in any one of claims 1 to 8, The ring track (1) of the containment inner dome cleaning device is installed at the top position of the inner surface of the shell, so that the connecting arm (2) can drive the spray head (3) to move along the ring track (1), so that the spray range covers the inner shell dome of the containment.

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