Foreign matter cleaning device for nuclear power station evaporator

Abstract

The foreign matter cleaning device for the nuclear power station evaporator comprises a sealing plate and a cleaning assembly, the sealing plate is used for shielding a manhole of the evaporator, and the sealing plate is provided with a first hole; the cleaning assembly comprises a negative pressure collector and a collecting pipe, one end of the collecting pipe is connected with the negative pressure collector, the other end of the collecting pipe can stretch into the evaporator through the first hole, and the negative pressure collector is used for providing negative pressure so that the collecting pipe can suck foreign matter in the evaporator into the negative pressure collector. When the negative-pressure collector is started, the interiors of the negative-pressure collector and the collecting pipe are negative-pressure environments, so that the collecting pipe can generate suction force, foreign matters in the evaporator are sucked into the collecting pipe and quickly enter the negative-pressure collector through the collecting pipe, and thus the cleaning efficiency of the foreign matters in the evaporator can be improved.

Description

Technical Field

[0001] This application belongs to the field of foreign object collection technology, and more specifically, relates to a foreign object cleaning device for a nuclear power plant evaporator. Background Technology

[0002] The nuclear power plant evaporator is one of the key pieces of equipment in the nuclear island. As the hub connecting the reactor cooling system (primary loop) and the system that drives the steam turbine generator set to do work (secondary loop), it plays an extremely important role in heat transfer.

[0003] One common issue is that residual cooling water from the primary circuit often remains on the primary side of the evaporator. Currently, this residual cooling water is cleaned manually. Before unit maintenance, the evaporator manhole needs to be opened. Workers, carrying wiping cloths, enter the evaporator through the manhole to wipe away the residual water. The cloths absorb the water, thus cleaning the primary side. However, the wiping cloths have limited absorbency, requiring frequent cloth replacements. This cumbersome process increases cleaning time, and the residual cooling water is radioactive. The prolonged cleaning work increases the radiation dose received by workers, seriously affecting their health. Utility Model Content

[0004] The purpose of this application is to provide a foreign matter cleaning device for nuclear power plant evaporators, so as to solve the technical problem in the prior art that it is easy to damage the health of workers when they enter the primary side of the evaporator to clean residual radioactive primary loop cooling water.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A foreign object removal device for a nuclear power plant evaporator is provided, comprising:

[0007] A sealing plate, the sealing plate being used to block the manhole of the evaporator, the sealing plate being provided with a first hole;

[0008] The cleaning assembly includes a negative pressure collector and a collection tube. One end of the collection tube is connected to the negative pressure collector, and the other end of the collection tube can extend into the interior of the evaporator through the first hole. The negative pressure collector is used to provide negative pressure so that the collection tube can draw foreign objects from inside the evaporator into the negative pressure collector.

[0009] In some embodiments, the cleaning assembly further includes a picker movably disposed on the sealing plate, the picker being provided with a suction head for adsorbing solid foreign matter in the evaporator, so that the picker can transfer the solid foreign matter in the evaporator to the negative pressure collector.

[0010] In some embodiments, the negative pressure collector includes a negative pressure pump and a receiving component connected to the negative pressure pump. The inner wall of the receiving component is provided with a first opening and a second opening. The first opening communicates with the collecting tube, and the second opening is used for the extractor to transfer solid foreign matter in the evaporator to the receiving component.

[0011] In some embodiments, the housing includes a first chamber and a second chamber, the first chamber being in communication with the negative pressure pump and the second chamber respectively, the inner wall of the second chamber being provided with the first opening and the second opening, and a filter screen being provided between the first chamber and the second chamber.

[0012] In some embodiments, the nuclear power plant evaporator foreign matter removal device further includes a display and a first monitor communicatively connected to the display. The display is disposed outside the evaporator, and the first monitor is disposed on the side of the sealing plate facing the inside of the evaporator. The first monitor is used to monitor the content of foreign matter inside the evaporator, and the display is used to display the information monitored by the first monitor.

[0013] In some embodiments, the first monitor is movably connected to the sealing plate, and the first monitor can rotate and move relative to the sealing plate.

[0014] In some embodiments, the sealing plate is movably provided with an adjusting member, and the sealing plate is also provided with a second hole. One end of the adjusting member can extend into the evaporator through the second hole. The first monitor is installed at the end of the adjusting member that extends into the evaporator, and the adjusting member is used to drive the first monitor to rotate and move.

[0015] In some embodiments, the sealing plate is provided with a mounting base, the mounting base having a third hole communicating with the second hole, and the end of the adjusting member facing away from the sealing plate being inserted into the third hole and extending out from the third hole.

[0016] In some embodiments, the first monitor is a scanner, and a light is also provided on the side of the sealing plate facing the interior of the evaporator, the light being used to enhance the brightness of the scanning area of ​​the scanner.

[0017] In some embodiments, the sealing plate is further provided with a second monitor for monitoring the temperature and / or humidity inside the evaporator.

[0018] The beneficial effects of the foreign object removal device for nuclear power plant evaporators provided in this application are as follows: By setting up a negative pressure collector and a collection pipe, workers can stand outside the evaporator and extend the collection pipe into the evaporator to clean and collect foreign objects. In this way, workers can avoid direct contact with foreign objects inside the evaporator, reducing the harm caused by foreign objects inside the evaporator to workers. When the negative pressure collector is activated, the negative pressure environment inside the negative pressure collector and the collection pipe creates a suction force, drawing foreign objects inside the evaporator into the collection pipe and quickly into the negative pressure collector, thus improving the cleaning efficiency of foreign objects inside the evaporator. Using a sealing plate to cover the manhole of the evaporator reduces the radioactive damage to workers caused by foreign objects inside the evaporator during the collection process, which helps to reduce the radiation dose received by workers during operation and improves the safety of the operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a foreign object removal device for a nuclear power plant evaporator provided in an embodiment of this application;

[0021] Figure 2 A schematic diagram of a foreign matter removal device for a nuclear power plant evaporator provided in an embodiment of this application (negative pressure collector, collection pipe, and object retriever are not shown);

[0022] Figure 3 for Figure 2 Another perspective schematic diagram of a foreign object removal device for a nuclear power plant evaporator;

[0023] Figure 4 This is a schematic diagram of a sealing plate provided in an embodiment of this application.

[0024] The following are the labeling elements in the figure:

[0025] 100. Manhole;

[0026] 1. Sealing plate; 101. First hole; 102. Second hole; 103. Fourth hole; 104. Observation hole; 105. Mounting base; 2. Negative pressure collector; 201. Negative pressure pump; 202. Housing component; 2021. First chamber; 2022. Liquid storage area; 2023. Second chamber; 2024. First opening; 2025. Second opening; 2026. Filter screen; 3. Collection tube; 4. Collector; 401. Suction head; 5. First monitor; 6. Adjustment component; 601. Fixing plate; 602. Adjustment part; 603. Limiting ring; 7. Lighting lamp; 8. Second monitor; 9. Baffle plate; 10. Bolt. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution and the beneficial effects of this application clearer, the following is in conjunction with the appendix. Figures 1 to 4 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, "multiple sets" means two or more sets, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise explicitly specified.

[0031] The evaporator is one of the key pieces of equipment in a nuclear power plant. As the hub connecting the reactor cooling system (primary loop) and the steam-driven turbine generator set (secondary loop), it plays a crucial role in heat transfer. It transfers the heat generated by the reactor in the primary loop to the water in the secondary loop, causing the water in the secondary loop to evaporate and form high-temperature, high-pressure steam. This steam drives the turbine generator set to rotate, converting thermal energy into mechanical energy, and finally, through the generator, converting mechanical energy into electrical energy, thus realizing the conversion of nuclear energy into electrical energy. In addition, the evaporator forms a physical barrier between the primary and secondary loops, effectively isolating the cooling water containing radioactive materials in the primary loop from the water and steam in the secondary loop. This ensures that the steam generated in the secondary loop is not radioactive, thereby guaranteeing the safety of the nuclear power plant's power generation process and the safety of personnel and the surrounding environment.

[0032] The cooling water output from the primary circuit enters the evaporator from one side, known as the primary side. Typically, the primary side of the evaporator includes internal tube sheets, U-shaped heat transfer tubes, baffles, and other components. To ensure the safe operation of the evaporator, regular maintenance is required. Before maintenance, the flange plate sealing the manhole must be removed, allowing personnel to enter the evaporator and inspect and maintain its internal components, ensuring the safe and stable operation of the unit.

[0033] However, due to structural design flaws in the evaporator, residual primary cooling water is easily left on the primary side of the evaporator. This residual cooling water is radioactive and can easily harm the health of workers. Therefore, before maintenance work begins, it is usually necessary to manually use a wiping cloth to absorb the residual water on the primary side of the evaporator, relying on the cloth's own water absorption capacity to achieve the purpose of cleaning. However, the water absorption capacity of the wiping cloth is limited, and the wiping cloth needs to be replaced multiple times during the cleaning process. The cumbersome operation increases the cleaning time and the radiation dose received by workers, seriously affecting their health.

[0034] Based on this, this application provides a foreign object cleaning device for a nuclear power plant evaporator to solve the above problems.

[0035] Please refer to the following: Figure 1 and Figure 2 This application provides a foreign object removal device for a nuclear power plant evaporator, which includes a sealing plate 1 and a cleaning assembly. The sealing plate 1 is used to cover the manhole 100 of the evaporator and is provided with a first hole 101. The cleaning assembly includes a negative pressure collector 2 and a collection pipe 3. One end of the collection pipe 3 is connected to the negative pressure collector 2, and the other end of the collection pipe 3 can extend into the interior of the evaporator through the first hole 101. The negative pressure collector 2 is used to provide negative pressure so that the collection pipe 3 can suck foreign objects inside the evaporator into the negative pressure collector 2.

[0036] It should be noted that the foreign matter inside the evaporator includes liquid foreign matter and solid foreign matter. Liquid foreign matter can be the cooling water of the primary circuit of the evaporator, and solid foreign matter can be crystals produced by the cooling water of the primary circuit. For example, such crystals can be boron crystals. When the negative pressure collector 2 is started, the negative pressure collector 2 and the collection pipe 3 are in a negative pressure environment, which enables the collection pipe 3 to generate suction. The foreign matter inside the evaporator is sucked into the collection pipe 3 and enters the negative pressure collector 2 through the collection pipe 3, where it is collected and stored by the negative pressure collector 2.

[0037] It should be noted that in some embodiments, the negative pressure collector 2 may be equipped with a radiation-proof enclosure, and foreign objects inside the evaporator may be stored inside this radiation-proof enclosure, thereby reducing harm to workers; in other embodiments, the negative pressure collector 2 may not be equipped with a radiation-proof enclosure, and the negative pressure collector 2 may be equipped with a material that can chemically react with the foreign objects inside the evaporator. After the negative pressure collector 2 collects and stores the foreign objects inside the evaporator, the material inside the negative pressure collector 2 can chemically react with the foreign objects, thereby weakening or eliminating the radioactivity of the foreign objects and reducing harm to workers.

[0038] The nuclear power plant evaporator foreign object removal device provided in this application, by setting up a negative pressure collector 2 and a collection pipe 3, allows workers to stand outside the evaporator and extend the collection pipe 3 into the evaporator to clean and collect foreign objects. In this way, workers can avoid direct contact with foreign objects inside the evaporator, reducing the harm to workers caused by foreign objects inside the evaporator. When the negative pressure collector 2 is activated, the inside of the negative pressure collector 2 and the collection pipe 3 is a negative pressure environment, which allows the collection pipe 3 to generate suction, drawing foreign objects inside the evaporator into the collection pipe 3 and quickly entering the negative pressure collector 2 through the collection pipe 3. This improves the cleaning efficiency of foreign objects inside the evaporator. The use of a sealing plate 1 to shield the manhole 100 of the evaporator reduces the radioactive damage to workers caused by foreign objects inside the evaporator during the collection process, which helps to reduce the radiation dose received by workers during operation and improves the safety of the operation.

[0039] In some embodiments, the diameter of the first hole 101 can be 160mm to 170mm, and the diameter of the collection tube 3 can be equal to or smaller than the diameter of the first hole 101. This reduces the probability of foreign objects clogging the collection tube 3. For example, the diameter of the first hole 101 can be 161mm, 162mm, 163mm, 164mm, 165mm, 166mm, 167mm, 168mm, 169mm, or 170mm.

[0040] In some embodiments, the sealing plate 1 can replace the original flange plate (not shown) used to seal the manhole 100 of the evaporator. The sealing plate 1 can be connected to the evaporator by bolts 10. For example, the bolts 10 can be nylon bolts.

[0041] In some embodiments, the cleaning assembly further includes a picker 4, which is movably disposed on the sealing plate 1. The picker 4 is provided with a suction head 401, which is used to adsorb solid foreign objects in the evaporator so that the picker 4 can transfer the solid foreign objects in the evaporator to the negative pressure collector 2.

[0042] It should be noted that the object retriever 4 is movably mounted on the sealing plate 1. The object retriever 4 can move or rotate relative to the sealing plate 1, thereby adjusting the position of the object retriever 4 to facilitate the cleaning of solid foreign objects in different locations inside the evaporator. The object retriever 4 can transfer solid foreign objects inside the evaporator to the negative pressure collector 2 located outside the evaporator through the first hole 101. Alternatively, an additional hole structure can be provided on the sealing plate 1 for the object retriever 4 to pass through.

[0043] It should be noted that solid foreign objects in the evaporator can be sucked into the negative pressure collector 2 by the collecting pipe 3, or they can be transferred into the negative pressure collector 2 by the extractor 4. For example, for some solid foreign objects that are larger than the inner diameter of the collecting pipe 3, they can be crushed first to break them into multiple smaller solid foreign objects, and then sucked into the negative pressure collector 2 by the collecting pipe 3. Alternatively, these solid foreign objects can be transferred directly into the negative pressure collector 2 by the extractor 4 without crushing them.

[0044] It should be noted that in some embodiments, the suction head 401 of the picker 4 can be a suction cup, which adsorbs solid foreign objects in the evaporator through its own deformation; in other embodiments, the suction head 401 of the picker 4 can be connected to a vacuum pump, which provides negative pressure to the suction head 401 so that the suction head 401 can generate suction to adsorb solid foreign objects in the evaporator; in still other embodiments, the suction head 401 of the picker 4 can be connected to a negative pressure collector 2, which provides negative pressure to the suction head 401 to generate suction; after the suction head 401 adsorbs solid foreign objects in the evaporator, the picker 4 can move the suction head 401, thereby moving the solid foreign objects, so that the foreign objects can be transferred into the negative pressure collector 2.

[0045] The device 4 can easily collect and transfer solid foreign objects inside the evaporator, thus improving the cleaning efficiency of foreign objects inside the evaporator.

[0046] In other embodiments, the suction head 401 of the object picker 4 can be replaced with a gripper. In this case, the gripper can pick up solid foreign objects in the evaporator and transfer the picked-up foreign objects to the negative pressure collector 2.

[0047] In some embodiments, the object retriever 4 may further include a telescopic tube, one end of which is hinged to the sealing plate 1, and the other end of which is provided with a suction head or gripper. When the telescopic tube extends or retracts, it can drive the suction head or gripper to move. When the telescopic tube rotates relative to the sealing plate 1, it can drive the suction head or gripper to rotate. This allows the suction head or gripper to have a greater degree of freedom, enabling the object retriever 4 to clean solid foreign objects in different locations inside the evaporator. For example, the telescopic tube may be made of stainless steel.

[0048] Continue to refer to Figure 1 In some embodiments, the negative pressure collector 2 includes a negative pressure pump 201 and a receiving component 202 connected to the negative pressure pump 201. The inner wall of the receiving component 202 is provided with a first opening 2024 and a second opening 2025. The first opening 2024 is connected to the collection pipe 3, and the second opening 2025 is used for the extractor 4 to transfer solid foreign objects in the evaporator to the receiving component 202. With the first opening 2024 and the second opening 2025 on the inner wall of the receiving component 202, and the first opening 2024 connected to the collection pipe 3, and the second opening 2025 used for the extractor 4 to transfer solid foreign objects in the evaporator to the receiving component 202, the extractor 4 can be used simultaneously to collect solid foreign objects inside the evaporator while the collection pipe 3 is sucking them up. The solid foreign objects collected by the extractor 4 can enter the negative pressure collector 2 through the second opening 2025. This means that the collection pipe 3 and the extractor 4 can be used simultaneously to clean the foreign objects inside the evaporator, thus further improving the efficiency of the cleaning operation.

[0049] In some embodiments, the housing 202 includes a first chamber 2021 and a second chamber 2023. The first chamber 2021 is connected to the negative pressure pump 201 and the second chamber 2023 respectively. The inner wall of the second chamber 2023 is provided with a first opening 2024 and a second opening 2025. A filter screen 2026 is provided between the first chamber 2021 and the second chamber 2023.

[0050] The first opening 2024 and the second opening 2025 are both located on the inner wall of the second chamber 2023. A filter screen 2026 is installed between the first chamber 2021 and the second chamber 2023. Under the filtration of the filter screen 2026, solid foreign objects are stored in the second chamber 2023, and liquid foreign objects are stored in the first chamber 2021. This can separate solid and liquid foreign objects, facilitating the subsequent harmless treatment of the collected foreign objects. A negative pressure pump 201 is connected to the first chamber 2021. Under the action of the negative pressure pump 201, liquid foreign objects in the second chamber 2023 can quickly flow into the first chamber 2021, thereby improving the separation speed of solid and liquid foreign objects.

[0051] In some embodiments, a liquid storage area 2022 is also provided in the first chamber 2021, and the height of the liquid storage area 2022 is lower than the height of the filter screen 2026.

[0052] It should be noted that the filter screen 2026 can be set on the side wall of the second chamber 2023 and adjacent to the bottom of the second chamber 2023. In this case, the water in the second chamber 2023 can be drawn into the first chamber 2021 under the action of the negative pressure pump 201. Of course, the filter screen 2026 can also be set at the bottom of the second chamber 2023. In this case, the water in the second chamber 2023 can enter the first chamber 2021 under the combined action of gravity and the negative pressure pump 201. Alternatively, the filter screen 2026 can be set on both the side wall and the bottom of the second chamber 2023.

[0053] It should be noted that the connection position between the first chamber 2021 and the negative pressure pump 201 can be higher than that of the liquid storage area 2022. This can reduce the probability of foreign objects entering the negative pressure pump 201 and help extend the service life of the negative pressure pump 201.

[0054] Reference Figures 1 to 3 In some embodiments, the nuclear power plant evaporator foreign matter removal device further includes a display (not shown) and a first monitor 5 that is communicatively connected to the display. The display is located outside the evaporator, and the first monitor 5 is located on the side of the sealing plate 1 facing the inside of the evaporator. The first monitor 5 is used to monitor the content of foreign matter inside the evaporator, and the display is used to display the information monitored by the first monitor 5.

[0055] It should be noted that the display and the first monitor 5 are connected via a communication connection. This communication connection refers to establishing a channel or link between different electronic components, systems, or networks that enables information transmission and interaction. This connection can be wired or wireless. Wired connections can be twisted-pair, fiber optic, or coaxial cable connections. Taking a twisted-pair connection as an example: the most common twisted-pair cable in daily life is the Ethernet cable, which consists of multiple twisted pairs and can be used for local area network (LAN) connections. It features low cost and stable transmission, making it suitable for connecting devices in fixed locations. For example, the display and the first monitor 5 can be connected via a twisted-pair cable, and the signal between them is transmitted through the twisted-pair cable. Wireless connections can be Wi-Fi, Bluetooth, or mobile network connections. Taking Bluetooth as an example: Bluetooth is a short-range wireless communication technology commonly used to connect mobile devices, headphones, keyboards, mice, etc. Bluetooth connections feature low power consumption, low cost, and convenience. For example, the display and the first monitor 5 can be connected via Bluetooth, and information between them is transmitted through Bluetooth. In industrial production, wired and wireless communication technologies are used to enable data transmission and control commands to be issued between devices. For example, various automated devices can be connected via industrial Ethernet to achieve real-time monitoring and optimization of the production process; wireless sensor networks can be used to monitor the production environment and equipment status to improve production efficiency and safety.

[0056] A display located outside the evaporator and a first monitor 5 located inside the evaporator are installed. Workers can observe the content of foreign objects inside the evaporator from the outside. When the content of foreign objects inside the evaporator is high, the negative pressure collector 2 can be turned on to clean the foreign objects. During the cleaning process, the remaining content of foreign objects inside the evaporator can be monitored in real time through the display and the first monitor 5, so as to judge the progress of the cleaning operation. In this way, workers do not need to enter the evaporator to check the cleaning effect, reducing the harm to workers caused by radioactive foreign objects in the evaporator during the cleaning operation.

[0057] In some embodiments, the first monitor 5 can be a scanner that monitors the content of foreign matter inside the evaporator by scanning the interior of the evaporator. An illumination lamp 7 is also provided on the side of the sealing plate 1 facing the interior of the evaporator to enhance the brightness of the scanner's scanning area. By providing the illumination lamp 7, the brightness of the scanner's scanning area can be increased, thereby improving the scanner's accuracy and the precision of monitoring the content of foreign matter inside the evaporator.

[0058] In some embodiments, the first monitor 5 can be communicatively connected to the negative pressure collector 2. When the first monitor 5 detects that the content of foreign matter inside the evaporator reaches a preset value, the first monitor 5 can send information to the negative pressure collector 2 to start the negative pressure collector 2, thus realizing automatic cleaning of foreign matter.

[0059] In some embodiments, the first monitor 5 can be communicatively connected to the object retriever 4. When the first monitor 5 detects a large solid foreign object inside the evaporator, the first monitor 5 can activate the object retriever 4 and send information to the object retriever 4. The object retriever 4 can be equipped with a processor. The processor inside the object retriever 4 can adjust the position of the object retriever 4 according to this information, thereby cleaning and transferring these solid foreign objects.

[0060] In some embodiments, the first monitor 5 is movably connected to the sealing plate 1, and the first monitor 5 can rotate and move relative to the sealing plate 1. By setting the first monitor 5 to rotate and move relative to the sealing plate 1, the position of the first monitor 5 can be adjusted, thereby adjusting its current monitoring range. This is equivalent to increasing the detection range of the first monitor 5, making it easier to observe foreign objects in different locations inside the evaporator.

[0061] In some embodiments, the first monitor 5 can be connected by a wired connection, and the cover plate 1 is also provided with a fourth hole 103 through which the connection wire of the first monitor 5 can be led out.

[0062] Reference Figures 2 to 4 The sealing plate 1 is movably provided with an adjusting member 6, and the sealing plate 1 is also provided with a second hole 102. One end of the adjusting member 6 can extend into the evaporator through the second hole 102. The first monitor 5 is installed at the end of the adjusting member 6 that extends into the evaporator. The adjusting member 6 is used to drive the first monitor 5 to rotate and move relative to the sealing plate 1.

[0063] By setting the adjustment piece 6 through the second hole 102, that is, by setting the adjustment piece 6 through the sealing plate 1, the operator can adjust the position of the first monitor 5 from the outside of the evaporator, which facilitates the operation and helps to improve the efficiency of the operation.

[0064] In some embodiments, the sealing plate 1 is provided with a mounting base 105, and the mounting base 105 is provided with a third hole communicating with the second hole 102. The end of the adjusting member 6 facing away from the sealing plate 1 is inserted into the third hole and extends out of the third hole. After the adjusting member 6 is installed in the third hole, the adjusting member 6 can rotate relative to the sealing plate 1, thereby realizing the rotation of the first monitor 5. In addition, the adjusting member 6 can be moved so that the adjusting member 6 can move relative to the mounting base 105 and the sealing plate 1, thereby realizing the movement of the first monitor 5.

[0065] In this embodiment, the adjusting member 6 is in the shape of a round rod, and the adjusting member 6 passes through the third hole. The wall of the third hole is attached to the outer periphery of the adjusting member 6 and supports the adjusting member 6. By setting the adjusting member 6 to be in the shape of a round rod, and the wall of the third hole is attached to the outer periphery of the adjusting member 6, the third hole is adapted to be in the shape of a round hole.

[0066] In some embodiments, the portion of the adjusting member 6 located outside the evaporator is provided with an adjusting part 602, which allows the operator to adjust the position of the first monitor 5 by applying force to the adjusting part 602.

[0067] In some embodiments, the adjustment part 602 of the adjustment member 6 can be a handwheel, which can be rotated or pulled by the operator to adjust the position of the adjustment member 6.

[0068] In some embodiments, a protrusion can be provided on the mounting base 105, and a third hole can be provided on the protrusion. This increases the length of the third hole and the contact area between the mounting base 105 and the adjusting member 6, which helps the adjusting member 6 to move smoothly.

[0069] In some embodiments, the outer periphery of the adjusting member 6 is also fitted with two spaced limiting rings 603, which are used to abut against the sealing plate 1 or the mounting base 105 to limit the range of movement of the adjusting member 6 and reduce the probability of the adjusting member 6 disengaging from the sealing plate 1.

[0070] In some embodiments, a lighting lamp 7 is provided on the side of the sealing plate 1 facing the inside of the evaporator, and a fixing plate 601 is provided on the end of the adjusting member 6 located inside the evaporator. The lighting lamp 7 and the first monitor 5 can be fixed to the fixing plate 601. When the position of the adjusting member 6 is changed, the positions of the lighting lamp 7 and the first monitor 5 can be adjusted at the same time.

[0071] In some embodiments, the second hole 102 of the sealing plate 1 can be the same size as the third hole of the mounting base 105. In this case, the hole wall of the second hole 102 can fit against the outer periphery of the adjusting member 6 and support the adjusting member 6. In other embodiments, the second hole 102 of the sealing plate 1 can be larger than the third hole of the mounting base 105. In this case, the hole wall of the second hole 102 can be spaced apart from the outer periphery of the adjusting member 6.

[0072] In some embodiments, the sealing plate 1 is further provided with a second monitor 8, which is used to monitor the temperature and / or humidity inside the evaporator. By providing the second monitor 8, the temperature and humidity inside the evaporator can be monitored, thus facilitating the acquisition of information about the internal conditions of the evaporator and providing data support for operations.

[0073] In some embodiments, the second monitor 8 includes a probe disposed on the side of the sealing plate 1 facing the outside of the evaporator, and the probe of the second monitor 8 can penetrate the sealing plate 1 and extend into the interior of the evaporator. Exemplarily, the probe of the second monitor 8 can be fixed to the fixing plate 601 of the adjusting member 6.

[0074] In some embodiments, the sealing plate 1 is provided with an observation hole 104, which allows the operator to directly observe the inside of the evaporator during operation. The sealing plate 1 is also provided with a shielding plate 9, which is detachably connected to the sealing plate 1 and can be used to shield the observation hole 104. In some embodiments, the observation hole 104 can also serve as an operating hole, allowing the operator to fix the mounting base 105 to the sealing plate 1 through the observation hole 104.

[0075] The foreign matter removal device for nuclear power plant evaporators provided in this application can be assembled according to the following steps:

[0076] S100. Connect the negative pressure pump 201 to the housing 202, and connect the housing 202 to the collection pipe 3.

[0077] S200. Install a fixing plate 601 at one end of the adjusting member 6, then fix the first monitor 5 and the lighting lamp 7 on the fixing plate 601, put a limiting ring 603 on the other end of the adjusting member 6, then pass the adjusting member 6 through the second hole 102 of the sealing plate 1 and the third hole of the mounting base 105, put another limiting ring 603 on the adjusting member 6, and then install the handwheel on the end of the adjusting member 6.

[0078] S300. Install a second monitor 8 on the sealing plate 1. The probe of the second monitor 8 is mounted on the fixing plate 601. The lines of the probes of the first monitor 5 and the second monitor 8 can be led out from the fourth hole 103 of the sealing plate 1 and connected to the display located outside the evaporator.

[0079] S400. Use bolts 10 to fix the sealing plate 1 to the flange face of the evaporator primary side manhole 100.

[0080] This application utilizes a nuclear power plant evaporator foreign object removal device and follows these steps to carry out the removal of foreign objects inside the evaporator:

[0081] S10. Turn on the first monitor 5 and the light 7 to observe the inside of the evaporator primary side manhole 100 and confirm the location and status of the foreign object.

[0082] S20. Turn on the second monitor 8 to continuously monitor the temperature and humidity inside the evaporator;

[0083] S30. Use the collection tube 3 to pass through the first hole 101 of the sealing plate 1, so that the end of the collection tube 3 enters the evaporator to suck up liquid foreign objects and small solid foreign objects.

[0084] S40. If a large solid foreign object is found inside the evaporator, the object can be transferred to the second chamber 2023 by using the object picker 4 through the sealing plate 1 and the suction head 401 or gripper of the object picker 4.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A foreign matter removal device for a nuclear power plant evaporator, characterized in that, include: A sealing plate, the sealing plate being used to block the manhole of the evaporator, the sealing plate being provided with a first hole; The cleaning assembly includes a negative pressure collector and a collection tube. One end of the collection tube is connected to the negative pressure collector, and the other end of the collection tube can extend into the interior of the evaporator through the first hole. The negative pressure collector is used to provide negative pressure so that the collection tube can draw foreign objects from inside the evaporator into the negative pressure collector.

2. The foreign matter removal device for nuclear power plant evaporators as described in claim 1, characterized in that, The cleaning assembly also includes a picker, which is movably mounted on the sealing plate. The picker is equipped with a suction head for adsorbing solid foreign objects inside the evaporator, so that the picker can transfer the solid foreign objects inside the evaporator to the negative pressure collector.

3. The foreign matter removal device for nuclear power plant evaporators as described in claim 2, characterized in that, The negative pressure collector includes a negative pressure pump and a receiving component connected to the negative pressure pump. The inner wall of the receiving component is provided with a first opening and a second opening. The first opening is connected to the collection pipe, and the second opening is used for the extractor to transfer solid foreign matter in the evaporator to the receiving component.

4. The foreign matter removal device for nuclear power plant evaporators as described in claim 3, characterized in that, The housing includes a first chamber and a second chamber. The first chamber is connected to the negative pressure pump and the second chamber, respectively. The inner wall of the second chamber is provided with the first opening and the second opening. A filter screen is provided between the first chamber and the second chamber.

5. The foreign matter removal device for a nuclear power plant evaporator as described in any one of claims 1-4, characterized in that, The nuclear power plant evaporator foreign matter removal device also includes a display and a first monitor connected in communication with the display. The display is located outside the evaporator, and the first monitor is located on the side of the sealing plate facing the inside of the evaporator. The first monitor is used to monitor the content of foreign matter inside the evaporator, and the display is used to display the information monitored by the first monitor.

6. The foreign matter removal device for nuclear power plant evaporators as described in claim 5, characterized in that, The first monitor is movably connected to the sealing plate, and the first monitor can rotate and move relative to the sealing plate.

7. The foreign matter removal device for nuclear power plant evaporators as described in claim 6, characterized in that, The sealing plate is movably provided with an adjusting member, and the sealing plate is also provided with a second hole. One end of the adjusting member can extend into the evaporator through the second hole. The first monitor is installed at the end of the adjusting member that extends into the evaporator. The adjusting member is used to drive the first monitor to rotate and move.

8. The foreign matter removal device for nuclear power plant evaporators as described in claim 7, characterized in that, The sealing plate is provided with a mounting base, and the mounting base is provided with a third hole communicating with the second hole. The end of the adjusting member facing away from the sealing plate is inserted into the third hole and extends out from the third hole.

9. The foreign matter removal device for nuclear power plant evaporators as described in claim 5, characterized in that, The first monitor is a scanner, and a light is also provided on the side of the sealing plate facing the inside of the evaporator. The light is used to enhance the brightness of the scanning area of ​​the scanner.

10. The foreign matter removal device for a nuclear power plant evaporator as described in any one of claims 1-4, characterized in that, The sealing plate is also equipped with a second monitor, which is used to monitor the temperature and / or humidity inside the evaporator.

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