A device for improving the sealing of a radioactive room drain hole of a nuclear power plant

Abstract

The utility model discloses a kind of for nuclear power plant radioactive room drainage hole's sealing promotion device, comprising: drainage tank, fixed assembly and one-way drainage component, through hole is provided in drainage tank, fixed assembly is installed in one end of drainage tank, one-way drainage component is installed in drainage tank interior;One-way drainage component includes: support frame and water retaining part, support frame is installed in drainage tank interior, water retaining part is rotatably connected on support frame, and located in the upper portion of support frame drainage outflow side.The whole device is convenient to disassemble, replace and maintain more conveniently without changing the civil structure of the scene, on the basis of guaranteeing the normal drainage function of drainage ditch, the sealing of the room itself can also be improved, the sealing of the room is good, meet the requirement of preventing high room radioactive material diffusion to low or no room, improve the level of plant radiation protection and safety factor, protect the life safety of personnel.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant sealing equipment technology, and in particular to a sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants. Background Technology

[0002] To prevent the spread of radioactive materials, nuclear power plants require high-level radioactive rooms to maintain a negative pressure environment to prevent gas from flowing from high-level radioactive areas to low-level radioactive areas.

[0003] Currently, some high-level radiation rooms cannot establish a negative pressure environment relative to low-level or non-radioactive rooms. One of the main reasons is that the drainage ditches in the high-level radiation rooms are connected to the adjacent rooms, resulting in poor or no negative pressure establishment between the inside and outside of the rooms. This reduces the radiation protection level of the power plant, lowers the safety factor, and affects the life safety of personnel. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sealing improvement device for drainage holes in radioactive rooms of nuclear power plants.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a sealing improvement device for drainage holes in radioactive rooms of nuclear power plants, including: a drainage box, a fixing component and a one-way drainage component, wherein the drainage box is provided with a through hole, the fixing component is installed at one end of the drainage box, and the one-way drainage component is installed inside the drainage box;

[0006] The one-way drainage assembly includes a support frame and a water-blocking component. The support frame is installed inside the drainage tank, and the water-blocking component is rotatably connected to the support frame and located on the upper part of the drainage outlet side of the support frame, so that the water-blocking component cooperates with the support frame to block the through hole provided in the drainage tank when no water flows through.

[0007] Furthermore, the support frame is installed inside the drainage tank at an angle toward the side where the drainage flows out.

[0008] Furthermore, the water-blocking component includes: a valve seat and a water-blocking plate, with the two valve seats symmetrically rotatably connected to the support frame, and the water-blocking plate clamped and installed on the two valve seats.

[0009] Furthermore, the support frame has an annular groove facing the side of the water-blocking component, and a sealing strip is provided in the annular groove.

[0010] Furthermore, the bottom end of the support frame on the side away from the water-blocking member is provided with a slope.

[0011] Furthermore, the area of ​​the water-blocking component is larger than the area of ​​the through hole on the support frame.

[0012] Furthermore, the fixing component includes a spring and a set screw. The bottom end of the spring is installed on the side of the drain box from which the water flows out. The set screw is installed on the drain box through a threaded pair, and the top end of the set screw is in contact with the spring.

[0013] Furthermore, the drainage tank is equipped with multiple blocking components installed in a wave-like pattern.

[0014] Furthermore, the blocking member is plate-shaped or arc-shaped.

[0015] Furthermore, the shape of the drainage box corresponds to the shape of the drainage ditch.

[0016] The following are the beneficial effects of implementing this utility model:

[0017] This application uses a fixing component installed at one end of the drainage tank, and a one-way drainage component installed inside the drainage tank. The one-way drainage component includes a support frame and a water-blocking member. The support frame is installed inside the drainage tank, and the water-blocking member is rotatably connected to the support frame, located at the upper part of the drainage outlet side of the support frame. When no water flows through, the water-blocking member cooperates with the support frame to block the through-hole in the drainage tank. The fixing component stably tightens the drainage tank in the drainage ditch. When nuclear wastewater flows through the through-hole in the drainage tank, the nuclear wastewater impacts the water-blocking member, causing it to rotate clockwise at the upper part of the support frame. A gap is created between the water-blocking member and the support frame, and the nuclear wastewater flows out through the gap. After the water flows through, the water-blocking member... The water-retaining component, under its own weight, causes the water-blocking component to rotate counterclockwise within the support frame. This allows the water-blocking component to cooperate with the support frame to block the through-hole in the drainage tank. The water-blocking component, support frame, and drainage tank together form a sealed space that blocks the drainage ditch, automatically creating a seal within the high-radiation room. This maintains a stable negative pressure environment above the drainage ditch, allowing for installation without altering the site's civil engineering structure. The entire device is easy to disassemble, replace, and maintain, making it more convenient. While ensuring the normal drainage function of the drainage ditch, it also improves the room's own sealing performance, ensuring good room airtightness and meeting the requirements for preventing the diffusion of radioactive materials from the high-radiation room to the low-radiation or non-radiation room. This enhances the power plant's radiation protection level and safety factor, protecting the lives of personnel. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] In the attached image:

[0020] Figure 1This is a schematic diagram of the sealing improvement device for drainage holes in radioactive rooms of nuclear power plants, according to some embodiments of this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of the sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to this utility model.

[0022] Figure 3 This is a schematic diagram of the unidirectional drainage component in this utility model.

[0023] Explanation of markings in the diagram

[0024] Drainage tank 1, fixing component 2, spring 21, set screw 22, one-way drainage component 3, support frame 31, water baffle 32, valve seat 321, water baffle 322, annular groove 33, sealing strip 34, inclined surface 35, blocking component 4. Detailed Implementation

[0025] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0026] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0028] Please see Figures 1 to 3 The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to the first embodiment of this utility model includes: a drainage tank 1, a fixing component 2, and a one-way drainage component 3. The drainage tank 1 is provided with a through hole. The fixing component 2 is installed at one end of the drainage tank 1, and the one-way drainage component 3 is installed inside the drainage tank 1. The one-way drainage component 3 includes: a support frame 31 and a water-blocking component 32. The support frame 31 is installed inside the drainage tank 1, and the water-blocking component 32 is rotatably connected to the support frame 31 and located at the upper part of the drainage outlet side of the support frame 31, so that when there is no water flow, the water-blocking component 32 cooperates with the support frame 31 to block the through hole provided in the drainage tank 1.

[0029] The drainage box 1 is a box with an internal through hole, allowing it to be connected from front to back. It can be placed in the drainage ditch between a high-level room and a relatively low-level or non-level room. The outer wall of the drainage box 1 is in contact with the inner wall of the drainage ditch to improve airtightness.

[0030] This application uses a fixing component 2 installed at one end of a drainage tank 1, and a one-way drainage component 3 installed inside the drainage tank 1. The one-way drainage component 3 includes a support frame 31 and a water-blocking component 32. The support frame 31 is installed inside the drainage tank 1, and the water-blocking component 32 is rotatably connected to the support frame 31, located at the upper part of the drainage outlet side of the support frame 31. When no water flows through, the water-blocking component 32 cooperates with the support frame 31 to block the through hole provided in the drainage tank 1. The fixing component 2 is used to stably tighten the drainage tank 1 in the drainage ditch. The water-blocking component 32 is rotatably connected to the water outlet side of the support frame 31. When nuclear wastewater passes through the through hole in the drainage tank 1, the nuclear wastewater will impact the water-blocking component 32, causing the water-blocking component 32 to rotate clockwise at the upper part of the support frame 31. A gap will be generated between the water-blocking component 32 and the support frame 31, and the nuclear wastewater will flow through the gap. As water flows out, the water-blocking component 32, under its own weight, rotates counterclockwise on the support frame 31. This causes the water-blocking component 32 and the support frame 31 to block the through hole in the drainage tank 1. The water-blocking component 32, the support frame 31, and the drainage tank 1 form a sealed space that blocks the drainage ditch, automatically creating a seal in the high-radiation room and maintaining a stable negative pressure environment above the drainage ditch. This allows for installation without altering the site's civil engineering structure. The entire device is easy to disassemble, replace, and maintain. In addition to ensuring the normal drainage function of the drainage ditch, it also improves the room's own sealing performance, ensuring good room airtightness and meeting the requirements for preventing the diffusion of radioactive materials from the high-radiation room to the low-radiation or non-radiation room. This improves the power plant's radiation protection level and safety factor, and protects the lives of personnel.

[0031] Please see Figure 2 In some embodiments, the support frame 31 is installed in the drain tank 1 at an angle toward the drain outlet.

[0032] This application uses a support frame 31 that is tilted in the direction of the drainage outlet to install inside the drainage tank 1. When no nuclear wastewater passes through the through hole in the drainage tank 1, the water-blocking component 32 will rotate counterclockwise due to its own gravity. The tilted installation of the support frame 31 in the drainage tank 1 also gives the water-blocking component 32 a certain tendency to gravitational force after it comes into contact with the support frame 31. This allows the water-blocking component 32 to fit more tightly with the support frame 31, thereby improving the sealing performance and further preventing radioactive materials in high-radiation rooms from spreading to low-radiation or non-radiation rooms through the drainage ditch, thus ensuring the safety of personnel.

[0033] Please see Figure 2 and Figure 3 In some embodiments, the water baffle 32 includes a valve seat 321 and a water baffle 322. The two valve seats 321 are symmetrically rotatably connected to the support frame 31, and the water baffle 322 is clamped and installed on the two valve seats 321.

[0034] This application utilizes a water-blocking component 32, comprising a valve seat 321 and a water-blocking plate 322. Two valve seats 321 are symmetrically rotatably connected to a support frame 31. The water-blocking plate 322 is clamped and installed on the two valve seats 321. The water-blocking plate 322 is mounted on the support frame 31 via the valve seats 321, allowing the water-blocking component 32 to rotate more smoothly on the support frame 31. This reduces the amount of impurities clogging the through holes in the drainage tank 1, improves the sealing between the water-blocking plate 322 and the support frame 31, and also reduces the amount of nuclear wastewater remaining on the side of the support frame 31 away from the water-blocking plate 322, thus improving the sealing of the high-temperature room. The room is cleaner and tidier, protecting the surrounding environment. After the nuclear wastewater passes through the through hole in the drainage tank 1, the smoothly rotating baffle 32 can more quickly rotate to the side that contacts the support frame 31 by its own gravity. It is then clamped and installed on the two valve seats 321 by the baffle plate 322. When the baffle plate 322 is damaged after being impacted by nuclear wastewater multiple times, maintenance personnel can easily install a new baffle plate 322 on the two valve seats 321, saving maintenance costs, making replacement more convenient, thereby improving the sealing performance and ensuring the safety of personnel.

[0035] Please see Figure 2 and Figure 3 In some embodiments, the support frame 31 has an annular groove 33 facing the water baffle 32, and a sealing strip 34 is provided in the annular groove 33.

[0036] This application features an annular groove 33 on the support frame 31 facing the water-blocking component 32. A sealing strip 34 is installed inside the annular groove 33. The annular groove 33 allows the sealing strip 34 to be more securely installed on the support frame 31. Under the long-term impact of nuclear wastewater, the sealing strip 34 maintains its integrity, thereby extending its service life and saving maintenance costs. The sealing strip 34 installed inside the annular groove 33 can further improve the sealing between the water-blocking component 32 and the support frame 31, reduce the passage of radioactive materials through the drainage ditch, and improve the sealing performance and safety factor.

[0037] Please see Figure 2 In some embodiments, the bottom end of the support frame 31 on the side away from the water-blocking member 32 is provided with a slope 35.

[0038] This application provides an inclined surface 35 at the bottom of the support frame 31 on the side away from the water baffle 32. The inclined surface 35 allows nuclear wastewater to flow more smoothly through the support frame 31, reducing the amount of nuclear wastewater remaining on the side of the support frame 31 away from the water baffle 322. The inclined surface 35 can also alleviate the impact force of nuclear wastewater on the bottom of the support frame 31, improve the connection strength between the support frame 31 and the drainage tank 1, further extend the service life of the entire device, and protect the surrounding environment.

[0039] Please see Figure 2 and Figure 3In some embodiments, the area of ​​the water-blocking member 32 is larger than the area of ​​the through hole on the support frame 31.

[0040] This application uses a water-blocking component 32 with an area larger than the through-hole area on the support frame 31, allowing the water-blocking component 32 to cover the support frame 31 more tightly, reducing the gap between the water-blocking component 32 and the support frame 31, further improving the room's airtightness, meeting the requirements for preventing the diffusion of radioactive materials from high-radiation rooms to low-radiation or non-radiation rooms, improving the power plant's radiation protection level and safety factor, and ensuring the safety of personnel.

[0041] Please see Figure 1 and Figure 2 In some embodiments, the fixing component 2 includes a spring piece 21 and a set screw 22. The bottom end of the spring piece 21 is installed on the side of the drain box 1 from which the water flows out. The set screw 22 is installed on the drain box 1 through a threaded pair, and the top end of the set screw 22 is in contact with the spring piece 21.

[0042] This application utilizes a fixing component 2, which includes a spring plate 21 and a set screw 22. The bottom end of the spring plate 21 is installed on the side of the drainage tank 1 where the water flows out. The set screw 22 is installed on the drainage tank 1 via a threaded pair, and the top end of the set screw 22 contacts the spring plate 21. After the drainage tank 1 is placed in the drainage ditch, the spring plate 21 will contact the side wall of the drainage ditch. The installer can move the set screw 22 on the drainage tank 1 toward the spring plate 21 by turning it. The top end of the set screw 22 will press the spring plate 21 against the side wall of the drainage ditch, thus tightening and fixing the drainage tank 1 in the drainage ditch. This allows for a more stable installation in the drainage ditch, reducing the gap between the drainage ditch and the drainage tank 1, improving the sealing performance, and maintaining a firm installation even after multiple passages of nuclear wastewater. When the inner wall of the drainage ditch is uneven, the spring plate 21 can fit more closely to the inner wall of the drainage ditch, further reducing the gap between the drainage tank 1 and the drainage ditch, making the installation of the drainage tank 1 and the drainage ditch more secure, thereby improving the sealing performance and stability.

[0043] Please see Figure 2 In some embodiments, multiple baffles 4 are installed in a wave-like pattern inside the drainage tank 1.

[0044] This application uses multiple baffles 4 installed in a wave-like pattern inside the drainage tank 1. These baffles 4 form a U-shaped water seal, which reduces the gas discharge from the device. The baffles 4 also reduce the impact of nuclear wastewater on the support frame 31, preventing deformation of the support frame 31. This allows the support frame 31 and the water-blocking component 32 to maintain a long-term seal, thereby extending the service life, improving the gas sealing performance, and ensuring the safety of surrounding personnel.

[0045] Please see Figure 2 In some embodiments, the blocking member 4 is plate-shaped or arc-shaped.

[0046] This application designs the baffle 4 in a plate or arc shape. A plate-shaped baffle 4 is easier to install, simpler to manufacture, saves on production costs, and provides a more convenient installation, resulting in a better U-shaped water seal. An arc-shaped baffle 4 can better disperse the impact force of nuclear wastewater, reduce the deformation of the baffle 4, allow for longer use, and ensure a more stable connection with the drainage tank 1, thereby improving the overall robustness of the device and extending its service life.

[0047] Please see Figure 1 and Figure 2 In some embodiments, the shape of the drainage tank 1 corresponds to the shape of the drainage ditch.

[0048] This application, by setting the shape of the drainage box 1 to correspond to the shape of the drainage ditch, can be applied to more usage scenarios. The circular drainage ditch and drainage box 1 can improve the load-bearing capacity and are suitable for some concealed drainage ditches. The rectangular drainage ditch and drainage box 1 are easier to manufacture and install, have lower manufacturing costs, and are easier to clean and maintain, thereby expanding the scope of application. They fit the drainage ditch better, improve sealing performance, and are more versatile.

[0049] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants, characterized in that, include: The drainage tank (1), the fixing component (2), and the one-way drainage component (3) are provided. The drainage tank (1) has a through hole. The fixing component (2) is installed at one end of the drainage tank (1). The one-way drainage component (3) is installed inside the drainage tank (1). The one-way drainage component (3) includes a support frame (31) and a water-blocking component (32). The support frame (31) is installed inside the drainage tank (1). The water-blocking component (32) is rotatably connected to the support frame (31) and is located on the upper part of the drainage outlet side of the support frame (31), so that the water-blocking component (32) cooperates with the support frame (31) to block the through hole provided in the drainage tank (1) when there is no water flow.

2. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The support frame (31) is installed in the drain box (1) at an angle toward the side where the drainage flows out.

3. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The water-blocking component (32) includes a valve seat (321) and a water-blocking plate (322). The two valve seats (321) are symmetrically rotatably connected to the support frame (31), and the water-blocking plate (322) is clamped and installed on the two valve seats (321).

4. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 3, characterized in that, The support frame (31) has an annular groove (33) facing the water baffle (32), and a sealing strip (34) is provided in the annular groove (33).

5. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The bottom end of the support frame (31) away from the water-blocking member (32) is provided with a slope (35).

6. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The area of ​​the water-blocking component (32) is larger than the area of ​​the through hole on the support frame (31).

7. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The fixing component (2) includes a spring (21) and a set screw (22). The bottom end of the spring (21) is installed on the side of the drain box (1) from which the water flows out. The set screw (22) is installed on the drain box (1) through a threaded pair. The top end of the set screw (22) is in contact with the spring (21).

8. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The drainage tank (1) is equipped with multiple blocking components (4) installed in a wave-like pattern.

9. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 8, characterized in that, The blocking element (4) is plate-shaped or arc-shaped.

10. The sealing enhancement device for drainage holes in radioactive rooms of nuclear power plants according to claim 1, characterized in that, The shape of the drainage box (1) corresponds to the shape of the drainage ditch.

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