Drainage opening and closing door device for sewer of nuclear power plant

Abstract

The utility model relates to the technical field of nuclear power plant sewer equipment, and particularly discloses a drainage opening and closing door device of a nuclear power plant sewer, which comprises a first radiation shielding opening and closing door, a second radiation shielding opening and closing door, a first water outlet, a second water outlet and a third radiation shielding opening and closing door, and the first radiation shielding opening and closing door is used for blocking a drainage channel and is configured to be normally closed; the second radiation shielding opening and closing door is arranged at the water outlet; one of the locking piece and the matching piece is arranged on the first radiation shielding opening and closing door, the other one of the locking piece and the matching piece is arranged on the second radiation shielding opening and closing door, the locking piece is provided with a first working position and a second working position, and the locking piece is located at the first working position; and the first self-floating assembly is connected with the locking piece. According to the passive locking device, the locking piece is controlled in a passive mode, operation is simplified, efficiency is improved, timeliness is improved, risks and potential safety hazards are reduced, and safety and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewer equipment in nuclear power plants, in particular to a drainage opening and closing door device for sewers in nuclear power plants. Background Art

[0002] The sewer is an important auxiliary facility in a nuclear power plant. Its safety and reliability are directly related to the stable operation of the entire nuclear power plant and the control of the radiation environment. The sewer system of a nuclear power plant not only undertakes the functions of drainage and sewage treatment, but also needs to meet the special needs in the radiation environment, such as the safe isolation and precise control of radioactive wastewater to avoid radiation hazards to the environment and operators. Therefore, the sewer design of a nuclear power plant places higher requirements on the opening and closing door device.

[0003] In the sewer system of a nuclear power plant, an opening and closing door device is usually provided to control the opening and closing of the pipeline to achieve functions such as regulating water flow and isolating radioactive sewage. However, in the prior art, the control method of such an opening and closing door device is mostly manual or electric control.

[0004] For manually controlled door opening and closing devices, operators need to enter the sewer or its surrounding environment to perform switch operations, which not only increases the workload, but also makes it difficult to fully guarantee the safety of operators in the radioactive environment of nuclear power plants. Frequent manual operations may lead to the accumulation of radiation doses, posing a serious threat to personnel health. In addition, in an emergency, the response speed of manual operation is slow, which is difficult to meet the nuclear power plant's needs for rapid handling of emergencies, further amplifying safety hazards.

[0005] Although the electrically controlled door opening and closing device can improve operational efficiency and convenience to a certain extent, it also has significant limitations in radioactive environments. The high radiation environment in a nuclear power plant may cause radiation damage or interference to the components of the electronic control system, resulting in unstable operation or even failure of the electric control system. In addition, the electric system is highly dependent on the power supply. In the event of a power outage or other emergency power outage, the electrically controlled door opening and closing device will not be able to operate normally, resulting in the door being unable to open or close as needed, affecting the control and safety management of radioactive wastewater. Especially in future fusion energy nuclear power plants, the strong neutron radiation and high-energy particle radiation generated by nuclear fusion reactors may pose greater challenges to traditional electric control systems. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a drainage opening and closing door device for a nuclear power plant sewer, which uses a passive method to control a locking member, simplifies operation, improves efficiency, reduces risks and safety hazards, and improves safety and stability.

[0007] According to an embodiment of the utility model, a drainage opening and closing door device for a nuclear power plant sewer comprises: a first radiation shielding opening and closing door, the first radiation shielding opening and closing door is used to block a drainage channel, the first radiation shielding opening and closing door is configured to be normally closed, and the first radiation shielding opening and closing door is provided with a drainage port; a second radiation shielding opening and closing door, the second radiation shielding opening and closing door is provided at the drainage port; a locking member and a matching member, one of the locking member and the matching member is provided on the first radiation shielding opening and closing door, and the other is provided on the second radiation shielding opening and closing door, the locking member has a first working position and a second working position, the locking member is located in the first working position, the locking member is connected to the matching member to lock the second radiation shielding opening and closing door, the locking member is located in the second working position, and the locking member and the matching member are spaced apart; a first self-floating component, the first self-floating component is connected to the locking member, so as to drive the locking member to the second working position when the water level in the drainage channel rises to a first preset height.

[0008] According to the drainage opening and closing door device of the nuclear power plant sewer in the embodiment of the utility model, the first self-floating component drives the locking member. The embodiment of the utility model uses a non-passive method to control the locking member, which simplifies the operation, improves efficiency, improves timeliness, reduces risks and safety hazards, and avoids damage to the safety of operators. At the same time, compared with the electric method, the drainage opening and closing door device of the nuclear power plant sewer in the embodiment of the utility model will not be disturbed by high radiation, and can work normally even in the event of a power outage or power supply interruption, thereby improving safety and stability.

[0009] In some embodiments, the first self-floating component includes: a first connecting member, one end of which is connected to the locking member; and a first self-floating member, which is connected to the other end of the first connecting member.

[0010] In some embodiments, the first connecting member is configured as a first flexible member, the first self-floating assembly further comprises a first auxiliary wheel, the first self-floating member and the locking member are disposed above the first auxiliary wheel, and the first flexible member is wrapped around the first auxiliary wheel.

[0011] In some embodiments, the drainage opening and closing door device of the nuclear power plant sewer also includes: a second self-floating component, the second self-floating component is connected to the locking member to drive the locking member to the second working position when the water level in the drainage channel rises to a second preset height, and the second preset height is set above the first preset height.

[0012] In some embodiments, the second self-floating component includes: a second flexible member, one end of which is connected to the locking member; a counterweight member, which is connected to the other end of the second flexible member; a second self-floating member, which is connected to the counterweight member via a third flexible member; and a second auxiliary wheel, which is arranged above the second self-floating member and the counterweight member, and the third flexible member is wrapped around the second auxiliary wheel.

[0013] In some embodiments, the second radiation shielding opening and closing door is rotatably disposed on the first radiation shielding opening and closing door.

[0014] In some embodiments, the first radiation shielding opening and closing door is provided with a rotation axis, the second radiation shielding opening and closing door is connected to the rotation axis and is configured to rotate around the rotation axis, and the rotation axis is arranged horizontally.

[0015] In some embodiments, the second radiation shielding opening and closing door is provided with a connecting portion, the connecting portion is connected to the rotating shaft, and the connecting portion is configured to be spaced apart from the upper and lower edges of the second radiation shielding opening and closing door.

[0016] In some embodiments, the matching piece is integrally formed at the bottom end of the second radiation shielding opening and closing door, and the locking piece is disposed below the second radiation shielding opening and closing door.

[0017] In some embodiments, the drainage opening and closing door device of the nuclear power plant sewer also includes: a driving member, the driving member is arranged on the first radiation shielding opening and closing door, and the rotation output end of the driving member is connected to the second radiation shielding opening and closing door to drive the second radiation shielding opening and closing door to rotate; an electric latch, the electric latch is arranged on the first radiation shielding opening and closing door, and the second radiation shielding opening and closing door is provided with a locking portion corresponding to the electric latch, and the electric latch is configured to disconnect from the locking portion when the power is turned off; a remote control member, the remote control member is electrically connected to the driving member and the electric latch, and the remote control member is suitable for obtaining control signals and controlling the driving member and the electric latch.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a drainage opening and closing door device of a nuclear power plant sewer in an embodiment of the utility model;

[0021] Figure 2It is a structural schematic diagram of the first self-floating component and the second self-floating component in the embodiment of the utility model;

[0022] Figure 3 A cross-sectional view of a drainage opening and closing door device for a nuclear power plant sewer in an embodiment of the utility model Figure 1 ;

[0023] Figure 4 A cross-sectional view of a drainage opening and closing door device for a nuclear power plant sewer in an embodiment of the utility model Figure 2 .

[0024] Reference numerals:

[0025] 100. A drainage opening and closing door device for a nuclear power plant sewer; 10. A first radiation shielding opening and closing door; 11. A drainage outlet; 12. A rotating shaft; 13. A hinge; 14. A clamping device; 15. A first lead-boron polyethylene layer; 20. A second radiation shielding opening and closing door; 21. A second lead-boron polyethylene layer; 30. A locking member; 40. A matching member; 50. A first self-floating component; 51. A first connecting member; 42. A first self-floating member; 43. A first auxiliary wheel; 60. A second self-floating component; 61. A second flexible member; 62. A counterweight member; 63. A second self-floating member; 631. A third flexible member; 64. A second auxiliary wheel; 70. A driving member; 80. An electric latch; 200. A drainage channel. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, features defined as “first” or “second” may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0029] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The following describes the drainage opening and closing door device 100 of the nuclear power plant sewer according to an embodiment of the utility model in conjunction with the accompanying drawings.

[0032] Reference Figure 1 According to an embodiment of the utility model, a drainage opening and closing door device 100 of a nuclear power plant sewer comprises: a first radiation shielding opening and closing door 10, a second radiation shielding opening and closing door 20, a locking member 30, a matching member 40 and a first self-floating component 50.

[0033] The first radiation shielding door 10 is used to block the drainage channel 200. The first radiation shielding door 10 is configured to be normally closed. The first radiation shielding door 10 is provided with a drainage port 11. The second radiation shielding door 20 is provided at the drainage port 11. The locking member 30 and the matching member 40 are provided on the first radiation shielding door 10, and the other is provided on the second radiation shielding door 20. The locking member 30 has a first working position and a second working position. The locking member 30 is located at the first working position. The locking member 30 is connected to the matching member 40 to lock the second radiation shielding door 20. The locking member 30 is located at the second working position. The locking member 30 and the matching member 40 are arranged at intervals. The first self-floating component 50 is connected to the locking member 30 to drive the locking member 30 to the second working position when the water level in the drainage channel 200 rises to a first preset height.

[0034] The first radiation shielding opening and closing door 10 and the second radiation shielding opening and closing door 20 have the function of shielding radiation to avoid radiation hazards to the environment and operators.

[0035] The first radiation shielding opening and closing door 10 can be opened and closed in the drainage channel 200 to open or close the drainage channel 200. The first radiation shielding opening and closing door 10 is provided with a drainage port 11. The second radiation shielding opening and closing door 20 can be opened and closed on the drainage port 11 to expose or block the drainage port 11. The locking member 30 and the matching member 40 cooperate with each other, one of which is installed on the first radiation shielding opening and closing door 10, and the other is installed on the second radiation shielding opening and closing door 20. When the locking member 30 is located in the first working position, the locking member 30 is connected to the matching member 40, and the second radiation shielding opening and closing door 20 blocks the drainage port 11. When the locking member 30 is located in the second working position, the locking member 30 is disconnected from the matching member 40, so that the drainage port 11 is exposed, and the liquid in the drainage channel 200 can flow from one side of the drainage opening and closing door device 100 of the nuclear power plant sewer to the opposite side.

[0036] The first self-floating component 50 at least partially floats on the surface of the liquid. When the water level of the liquid changes, the height of the first self-floating component 50 changes, driving the locking member 30 to switch between the first working position and the second working position. In other words, the water level in the drainage channel 200 is a factor that determines whether the drainage port 11 is exposed.

[0037] The first preset height is a height preset manually. When the water level reaches the first preset height, the locking member 30 switches to the second working position, so that the drain port 11 is exposed, and the liquid in the drain channel 200 can flow from one side of the drain opening and closing door device 100 of the nuclear power plant sewer to the opposite side. The first preset height can be adjusted to meet different needs.

[0038] The sewer is an important auxiliary facility in a nuclear power plant. Its safety and reliability are directly related to the stable operation of the entire nuclear power plant and the control of the radiation environment. The sewer system of a nuclear power plant not only undertakes the functions of drainage and sewage treatment, but also needs to meet the special needs in the radiation environment, such as the safe isolation and precise control of radioactive wastewater to avoid radiation hazards to the environment and operators. Therefore, the sewer design of a nuclear power plant places higher requirements on the opening and closing door device.

[0039] In the sewer system of a nuclear power plant, an opening and closing door device is usually provided to control the opening and closing of the pipeline to achieve functions such as regulating water flow, isolating radioactive sewage, and preventing backflow. However, in the prior art, the control method of such an opening and closing door device is mostly manual or electric control.

[0040] For manually controlled door opening and closing devices, operators need to enter the sewer or its surrounding environment to perform switch operations, which not only increases the workload, but also makes it difficult to fully guarantee the safety of operators in the radioactive environment of nuclear power plants. Frequent manual operations may lead to the accumulation of radiation doses, posing a serious threat to personnel health. In addition, in an emergency, the response speed of manual operation is slow, which is difficult to meet the nuclear power plant's needs for rapid handling of emergencies, further amplifying safety hazards.

[0041] Although the electrically controlled door opening and closing device can improve operational efficiency and convenience to a certain extent, it also has significant limitations in radioactive environments. The high radiation environment in a nuclear power plant may cause radiation damage or interference to the components of the electronic control system, resulting in unstable operation or even failure of the electric control system. In addition, the electric system is highly dependent on the power supply. In the event of a power outage or other emergency power outage, the electrically controlled door opening and closing device will not be able to operate normally, resulting in the door being unable to open or close as needed, affecting the control and safety management of radioactive wastewater. Especially in future fusion energy nuclear power plants, the strong neutron radiation and high-energy particle radiation generated by nuclear fusion reactors may pose greater challenges to traditional electric control systems.

[0042] In the embodiment of the utility model, the first self-floating component 50 is used to drive the locking member 30. When the water level in the drainage channel 200 rises to a first preset height, the locking member 30 is spaced apart from the matching member 40, thereby removing the restriction on the second radiation shielding opening and closing door 20, allowing the second radiation shielding opening and closing door 20 to rotate freely, thereby opening the drainage channel 200, and water can flow from one side of the drainage opening and closing door device 100 of the nuclear power plant sewer to the other side. The embodiment of the utility model uses a non-passive method to control the locking member 30, which simplifies the operation, improves efficiency, improves timeliness, and reduces risks and safety hazards compared to the manual method. At the same time, compared with the electric method, the drainage opening and closing door device 100 of the nuclear power plant sewer in the embodiment of the utility model can work normally even in the event of a power outage or power supply interruption, such as an earthquake, thereby improving safety and stability.

[0043] In some specific embodiments, the first radiation shielding opening and closing door 10 is opened to make the drainage channel 200 unobstructed, so as to facilitate maintenance personnel to pass through for maintenance.

[0044] In some specific embodiments, the locking member 30 is installed on the first radiation shielding opening and closing door 10, and the matching member 40 is installed on the second radiation shielding opening and closing door 20; in other embodiments, the locking member 30 is installed on the second radiation shielding opening and closing door 20, and the matching member 40 is installed on the first radiation shielding opening and closing door 10.

[0045] In some specific embodiments, the drainage opening and closing door device 100 of the nuclear power plant sewer is installed in the drainage channel 200 of the power plant. For example, the drainage opening and closing door device 100 of the nuclear power plant sewer is installed in the drainage channel 200 of the nuclear power device. When an accident occurs in the nuclear power device, the drain outlet 11 opens, allowing liquid to enter the space where the reactor is located, forming a flooded environment, thereby improving safety.

[0046] According to the drainage opening and closing door device 100 of the nuclear power plant sewer in the embodiment of the utility model, the first self-floating component 50 drives the locking member 30. The embodiment of the utility model uses a non-passive method to control the locking member 30, which simplifies the operation, improves efficiency, improves timeliness, reduces risks and safety hazards, and avoids damage to the safety of operators. At the same time, compared with the electric method, the drainage opening and closing door device 100 of the nuclear power plant sewer in the embodiment of the utility model will not be disturbed by high radiation, and can work normally even in the event of a power outage or power supply interruption, thereby improving safety and stability.

[0047] Reference Figure 2 In some embodiments, the first self-floating component 50 includes: a first connecting member 51 and a first self-floating member 42 .

[0048] One end of the first connecting member 51 is connected to the locking member 30 . The first self-floating member 42 is connected to the other end of the first connecting member 51 .

[0049] Among them, the two ends of the first connecting member 51 are respectively connected to the locking member 30 and the first self-floating member 42. The first self-floating member 42 is located on the liquid surface. The first self-floating member 42 is affected by the buoyancy of the liquid. The first connecting member 51 transfers the buoyancy of the first self-floating member 42 to the locking member 30, driving the locking member 30 to move.

[0050] In the above scheme, the buoyancy is transmitted to the locking member 30 through the cooperation of the first connecting member 51 and the first self-floating member 42. The overall structure is simple and practical, and it can work normally even in the case of a power outage, thereby improving safety and stability.

[0051] In some specific embodiments, the first connecting member 51 is a connecting rod, which transmits the buoyancy of the first self-floating member 42 to drive the locking member 30 to move; in other specific embodiments, the first connecting member 51 is a flexible member, which converts the buoyancy of the first self-floating member 42 into a pulling force to pull the locking member 30.

[0052] Reference Figure 2 In some embodiments, the first connecting member 51 is constructed as a first flexible member, the first self-floating component 50 also includes a first auxiliary wheel 43, the first self-floating member 42 and the locking member 30 are arranged above the first auxiliary wheel 43, and the first flexible member is wrapped around the first auxiliary wheel 43.

[0053] The first flexible member is wound around the first auxiliary wheel 43 , and the first auxiliary wheel 43 plays an auxiliary role, converts the force direction, and converts the rising buoyancy of the first self-floating member 42 into a pulling force for pulling the locking member 30 downward.

[0054] In the above scheme, by setting the first auxiliary wheel 43 below the first self-floating member 42 and the locking member 30, the first auxiliary wheel 43 is used to convert the force direction, which facilitates the force of the locking member 30 and converts the upward buoyancy of the first self-floating member 42 into a downward pulling force, making the action more reliable and improving the reliability.

[0055] Specifically, the first flexible member is a rope, which is convenient for replacement.

[0056] Reference Figure 2 In some embodiments, the drainage opening and closing door device 100 of the nuclear power plant sewer further includes: a second self-floating component 60, the second self-floating component 60 is connected to the locking component 30, so as to drive the locking component 30 to a second working position when the water level in the drainage channel 200 rises to a second preset height, and the second preset height is set above the first preset height.

[0057] Among them, the second self-floating component 60 is a backup component of the first self-floating component 50. When the first self-floating component 50 cannot work normally, the second self-floating component 60 comes into play. The second self-floating component at least partially floats on the surface of the liquid. When the water level of the liquid changes, the height of the second self-floating component 60 changes, driving the locking component 30, so that the locking component 30 switches between the first working position and the second working position.

[0058] The second preset height is a height preset manually. When the water level reaches the second preset height when the first self-floating assembly 50 fails to work normally, the locking member 30 switches to the second working position, exposing the drain port 11, and the liquid in the drain channel 200 can flow from one side of the drain opening and closing door device 100 of the nuclear power plant sewer to the opposite side. The second preset height can be adjusted to meet different needs.

[0059] In the above scheme, by setting up a spare second self-floating component 60, when the first self-floating component 50 cannot work normally, the second self-floating component 60 automatically works, reducing the probability that the drainage opening and closing door device 100 of the nuclear power plant sewer cannot be opened, thereby further improving safety.

[0060] Reference Figure 2 In some embodiments, the second self-floating component 60 includes: a second flexible member 61 , a counterweight member 62 , a second self-floating member 63 and a second auxiliary wheel 64 .

[0061] One end of the second flexible member 61 is connected to the locking member 30. The counterweight member 62 is connected to the other end of the second flexible member 61. The second self-floating member 63 is connected to the counterweight member 62 via the third flexible member 631. The second auxiliary wheel 64 is disposed above the second self-floating member 63 and the counterweight member 62, and the third flexible member 631 is wound around the second auxiliary wheel 64.

[0062] Among them, the third flexible member 631 is arranged between the counterweight 62 and the second self-floating member 63, the second auxiliary wheel 64 is arranged above the second self-floating member 63 and the counterweight 62, the third flexible member 631 is wrapped around the second auxiliary wheel 64, the second auxiliary wheel 64 plays an auxiliary role, the second auxiliary wheel 64 is affected by its own gravity and buoyancy, the counterweight 62 is subjected to an upward pulling force, when the second self-floating member 63 floats, the counterweight 62 descends, one end of the second flexible member 61 is connected to the counterweight 62, and the other end is connected to the locking member 30, the counterweight 62 falls and pulls the locking member 30, driving the locking member 30 to move.

[0063] In the above scheme, through the cooperation of the second flexible member 61, the counterweight member 62, the second self-floating member 63 and the second auxiliary wheel 64, the locking member 30 is triggered when the water level rises to the second preset height, thereby reducing the probability that the drainage opening and closing door device 100 of the nuclear power plant sewer cannot be opened, thereby further improving safety. The overall structure makes full use of the changes in the entity, and the safety is further improved in a non-active manner.

[0064] Specifically, when the water level does not reach the second preset height, the second flexible member 61 is in a relaxed state to avoid interfering with the operation of the first self-floating component 50 .

[0065] In some embodiments, the second radiation shielding opening and closing door 20 is rotatably disposed on the first radiation shielding opening and closing door 10 .

[0066] The second radiation shielding door 20 is opened and closed by rotation. The second radiation shielding door 20 rotates relative to the first radiation shielding door 10 to expose or block the drain port 11 .

[0067] In the above scheme, by setting a rotating second radiation shielding opening and closing door 20 to expose or block the drain outlet 11, the movement of the second radiation shielding opening and closing door 20 is simpler. Even under high water pressure, the second radiation shielding opening and closing door 20 can be opened smoothly, thereby improving convenience.

[0068] In some other embodiments, the second radiation shielding opening and closing door 20 is movably disposed on the first radiation shielding opening and closing door 10 .

[0069] Reference Figure 1In some embodiments, the first radiation shielding opening and closing door 10 is provided with a rotating shaft 12, the second radiation shielding opening and closing door 20 is connected to the rotating shaft 12 and is configured to rotate around the rotating shaft 12, and the rotating shaft 12 is arranged horizontally.

[0070] The second radiation shielding opening and closing door 20 rotates around the rotating shaft 12, and the rotating shaft 12 is arranged horizontally, that is, the second radiation shielding opening and closing door 20 rotates horizontally.

[0071] In the above scheme, by providing a horizontal rotating shaft 12, the second radiation shielding opening and closing door 20 can be horizontally rotated, so that the forces on various parts of the second radiation shielding opening and closing door 20 are more balanced, thereby increasing the service life.

[0072] Specifically, the opening angle of the second radiation shielding opening and closing door 20 is one hundred and eighty degrees and maintained, thereby draining the accumulated water.

[0073] In some embodiments, the second radiation shielding opening and closing door 20 is provided with a connecting portion, the connecting portion is connected to the rotating shaft 12 , and the connecting portion is configured to be spaced apart from the upper and lower edges of the second radiation shielding opening and closing door 20 .

[0074] Among them, the part of the second radiation shielding opening and closing door 20 connected to the rotating shaft 12 is the connecting part, which is located in the middle part of the second radiation shielding opening and closing door 20. The connecting part is spaced apart from the upper and lower edges of the second radiation shielding opening and closing door 20, and the first radiation shielding opening and closing door 10 rotates around the middle part.

[0075] In the above scheme, by setting the connecting part in the middle part of the second radiation shielding opening and closing door 20, the second radiation shielding opening and closing door 20 rotates around the middle part, so that the force on the second radiation shielding opening and closing door 20 is more balanced, avoiding weak points, thereby further increasing the service life and making the second radiation shielding opening and closing door 20 rotate more smoothly.

[0076] Reference Figure 1 In some embodiments, the matching member 40 is integrally formed at the bottom end of the second radiation shielding opening and closing door 20 , and the locking member 30 is disposed below the second radiation shielding opening and closing door 20 .

[0077] The matching piece 40 is disposed on the second radiation shielding opening and closing door 20 , the locking piece 30 is disposed on the first radiation shielding opening and closing door 10 and is located below the second radiation shielding opening and closing door 20 , and the locking piece 30 moves upward to connect with the matching piece 40 .

[0078] In the above scheme, the matching part 40 is integrally formed on the second radiation shielding opening and closing door 20, so as to reduce the number of parts and components and reduce the cost. Moreover, the matching part 40 is located at the bottom end of the second radiation shielding opening and closing door 20, and the locking part 30 is conveniently connected to the matching part 40, thereby improving the convenience and making the drainage opening and closing door device 100 of the nuclear power plant sewer more reliably operate.

[0079] Specifically, the matching part 40 is a hole structure on the second radiation shielding opening and closing door 20, the locking part 30 is a latch part, the locking part 30 is located in the first working position, the latch part is inserted into the hole structure, the locking part 30 is located in the second working position, and the latch part is spaced apart from the hole structure.

[0080] Reference Figure 1 In some embodiments, the drainage opening and closing door device 100 of the sewer of a nuclear power plant further includes: a driving member 70, an electric latch 80 and a remote control member.

[0081] The driving member 70 is provided at the first radiation shielding opening and closing door 10, and the rotation output end of the driving member 70 is connected to the second radiation shielding opening and closing door 20 to drive the second radiation shielding opening and closing door 20 to rotate. The electric bolt 80 is provided at the first radiation shielding opening and closing door 10, and the second radiation shielding opening and closing door 20 is provided with a stopper corresponding to the electric bolt 80, and the electric bolt 80 is configured to disconnect from the stopper when the power is turned off. The remote control member is electrically connected to the driving member 70 and the electric bolt 80, and the remote control member is suitable for obtaining control signals and controlling the driving member 70 and the electric bolt 80.

[0082] Among them, the driving member 70 is installed on the first radiation shielding opening and closing door 10, and the rotation output end of the driving member 70 is connected to the second radiation shielding opening and closing door 20, driving the second radiation shielding opening and closing door 20 to rotate. The driving member 70 is electrically connected to the remote control member. Under the control of the remote control member, the operator can remotely start the driving member 70. At the same time, an electric latch 80 is provided on the first radiation shielding opening and closing door 10. The electric latch 80 cooperates with the upper end locking part of the second radiation shielding opening and closing door 20 to lock the second radiation shielding opening and closing door 20. The electric latch 80 is electrically connected to the remote control member. Under the control of the remote control member, the operator can remotely start the electric latch 80.

[0083] The electric latch 80 is configured to be disconnected from the locking portion when power is turned off. That is, when power is turned off, the electric latch 80 is disconnected from the locking portion.

[0084] In the above scheme, by cooperating with the driving member 70, the electric bolt 80 and the remote control member, the remote driving and locking functions are further added on the basis of the first self-floating assembly 50, thereby further improving the convenience and safety, and improving the automation level of the drainage opening and closing door device 100 of the sewer of the nuclear power plant. The electric and passive ones are used as a backup, double insurance, and can realize the opening action and keep the open state under earthquake conditions, and can also realize the remote electric opening, locking and closing functions and signal transmission functions under normal conditions.

[0085] In some specific embodiments, the first radiation shielding opening and closing door 10 is installed on the building through hinges 13, and a pressing device 14 is provided on the building, and the pressing device 14 presses the first radiation shielding opening and closing door 10. More specifically, there are multiple hinges 13 to improve stability.

[0086] More specifically, the building is a shielding layer of a nuclear power device, the inside of the shielding layer is a reactor, and the drainage channel 200 is arranged on the shielding layer. In the event of an accident, the drainage opening and closing door device 100 of the nuclear power plant sewer opens, and liquid enters the space where the reactor is located, forming a flooded environment, thereby improving safety.

[0087] Reference Figure 3 , Figure 4 Specifically, the first radiation shielding opening and closing door 10 is provided with a first lead-boron polyethylene layer 15, and the first lead-boron polyethylene layer 15 plays a role of neutron shielding, so that the drainage opening and closing door device 100 of the nuclear power plant sewer is adapted to the nuclear power device, thereby improving safety.

[0088] Specifically, the second radiation shielding opening and closing door 20 is provided with a second lead-boron polyethylene layer 21, and the second lead-boron polyethylene layer 21 plays a role of neutron shielding, so that the drainage opening and closing door device 100 of the nuclear power plant sewer is adapted to the nuclear power device, thereby improving safety.

[0089] In some specific embodiments, the first self-floating component 50 and the second self-floating component 60 are disposed below the locking member 30 to facilitate force bearing.

[0090] In some specific embodiments, after the accident is eliminated or the door is opened by mistake, the lower manual reset locking member 30 can electrically reset the second radiation shielding opening and closing door 20 through the driving member 70, and the first radiation shielding opening and closing door 10 remains in a normally closed state.

[0091] The following describes in detail the drainage opening and closing door device 100 for the sewer of a nuclear power plant according to an embodiment of the utility model in conjunction with the accompanying drawings.

[0092] The drainage opening and closing door device 100 of the nuclear power plant sewer includes a first radiation shielding opening and closing door 10, which is also installed on the wall through a hinge 13. The first radiation shielding opening and closing door 10 is connected to a driving member 70, and the first radiation shielding opening and closing door 10 is connected to an electric latch 80. The driving member 70 can drive the second radiation shielding opening and closing door 20. The first radiation shielding opening and closing door 10 is inserted with a locking member 30, and the locking member 30 is respectively connected to a counterweight member 62 and a first self-floating member 42 through two ropes. The counterweight member 62 is connected to a second self-floating member 63 through a rope. The first radiation shielding opening and closing door 10 and the second radiation shielding opening and closing door 20 are filled with lead-boron polyethylene plates.

[0093] The counterweight 62, the second self-floating member 63 and the first self-floating member 42 are all located below the locking member 30, the rope used to connect the locking member 30 and the first self-floating member 42 are fixedly connected to the locking member 30 and the first self-floating member 42, the rope used to connect the locking member 30 and the counterweight 62 are fixedly connected to the locking member 30 and the counterweight 62, the rope used to connect the counterweight 62 and the second self-floating member 63 are fixedly connected to the counterweight 62 and the second self-floating member 63, the rope used to connect the locking member 30 and the first self-floating member 42 is bypassed over the first auxiliary wheel 43, the rope used to connect the counterweight 62 and the second self-floating member 63 is bypassed over the second auxiliary wheel 64, and the second auxiliary wheel 64 is located above the first auxiliary wheel 43, the second auxiliary wheel 64 and the first auxiliary wheel 43 are both located below the locking member 30, the counterweight 62 and the second self-floating member The floating parts 63 are all located below the second auxiliary wheel 64, and the first self-floating parts 42 are located above the first auxiliary wheel 43. By arranging the first radiation shielding opening and closing door 10, the clamping device 14, the driving part 70, the locking part 30, the electric latch 80, the counterweight 62, the second self-floating part 63 and the first self-floating part 42, it can have a passive opening and closing function, and the passive opening and closing device can change the trigger time according to the needs. At the same time, the electric and passive ones are used as a backup, double insurance, and can realize the opening action and maintain the open state under earthquake conditions. It can also realize the remote electric opening, locking and closing functions and signal transmission functions under normal conditions. At the same time, the float adopts a one-main-one-backup method. By arranging a lead-boron polyethylene plate in the second radiation shielding opening and closing door 20, the second radiation shielding opening and closing door 20 has a neutron shielding function.

[0094] Other structures and operations of the drainage opening and closing door device 100 of the nuclear power plant sewer according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0095] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A drainage opening and closing door device for a nuclear power plant sewer, characterized in that: include: a first radiation shielding opening and closing door (10), the first radiation shielding opening and closing door (10) being used to block the drainage channel (200), the first radiation shielding opening and closing door (10) being configured to be normally closed, and the first radiation shielding opening and closing door (10) being provided with a drainage port (11); a second radiation shielding opening and closing door (20), wherein the second radiation shielding opening and closing door (20) is arranged at the drain outlet (11); A locking member (30) and a matching member (40), wherein one of the locking member (30) and the matching member (40) is arranged on the first radiation shielding opening and closing door (10), and the other is arranged on the second radiation shielding opening and closing door (20), the locking member (30) having a first working position and a second working position, the locking member (30) being located at the first working position, the locking member (30) being connected to the matching member (40) to lock the second radiation shielding opening and closing door (20), the locking member (30) being located at the second working position, the locking member (30) and the matching member (40) being arranged at an interval to allow the second radiation shielding opening and closing door (20) to move freely; A first self-floating component (50), the first self-floating component (50) being connected to the locking component (30) so as to drive the locking component (30) to the second working position when the water level in the drainage channel (200) rises to a first preset height.

2. The drainage opening and closing door device for the nuclear power plant sewer according to claim 1, characterized in that: The first self-floating component (50) comprises: A first connecting member (51), one end of the first connecting member (51) being connected to the locking member (30); A first self-floating member (42), wherein the first self-floating member (42) is connected to the other end of the first connecting member (51).

3. The drainage opening and closing door device for the sewer of a nuclear power plant according to claim 2, characterized in that: The first connecting member (51) is configured as a first flexible member, the first self-floating assembly (50) further comprises a first auxiliary wheel (43), the first self-floating member (42) and the locking member (30) are arranged above the first auxiliary wheel (43), and the first flexible member is wound around the first auxiliary wheel (43).

4. The drainage opening and closing door device for the sewer of a nuclear power plant according to claim 1, characterized in that: Also includes: A second self-floating component (60), the second self-floating component (60) being connected to the locking component (30) so as to drive the locking component (30) to the second working position when the water level in the drainage channel (200) rises to a second preset height, the second preset height being set above the first preset height.

5. The drainage opening and closing door device for the sewer of a nuclear power plant according to claim 4, characterized in that: The second self-floating component (60) comprises: a second flexible member (61), wherein one end of the second flexible member (61) is connected to the locking member (30); A counterweight member (62), the counterweight member (62) being connected to the other end of the second flexible member (61); a second self-floating member (63), wherein the second self-floating member (63) is connected to the counterweight member (62) via a third flexible member (631); A second auxiliary wheel (64), wherein the second auxiliary wheel (64) is arranged above the second self-floating member (63) and the counterweight member (62), and the third flexible member (631) is wound around the second auxiliary wheel (64).

6. The drainage opening and closing door device for the nuclear power plant sewer according to claim 1, characterized in that: The second radiation shielding opening and closing door (20) is rotatably arranged on the first radiation shielding opening and closing door (10).

7. The drainage opening and closing door device for the nuclear power plant sewer according to claim 6, characterized in that: The first radiation shielding opening and closing door (10) is provided with a rotating shaft (12), the second radiation shielding opening and closing door (20) is connected to the rotating shaft (12) and is configured to rotate around the rotating shaft (12), and the rotating shaft (12) is arranged horizontally.

8. The drainage opening and closing door device for the nuclear power plant sewer according to claim 7, characterized in that: The second radiation shielding opening and closing door (20) is provided with a connecting portion, the connecting portion is connected to the rotating shaft (12), and the connecting portion is configured to be spaced apart from the upper and lower edges of the second radiation shielding opening and closing door (20).

9. The drainage opening and closing door device for the sewer of a nuclear power plant according to claim 7, characterized in that: The matching piece (40) is integrally formed at the bottom end of the second radiation shielding opening and closing door (20), and the locking piece (30) is arranged below the second radiation shielding opening and closing door (20).

10. The drainage opening and closing door device for a nuclear power plant sewer according to any one of claims 1 to 9, characterized in that: Also includes: A driving member (70), the driving member (70) being arranged on the first radiation shielding opening and closing door (10), and a rotation output end of the driving member (70) being connected to the second radiation shielding opening and closing door (20) so as to drive the second radiation shielding opening and closing door (20) to rotate; an electric bolt (80), the electric bolt (80) being arranged on the first radiation shielding opening and closing door (10), the second radiation shielding opening and closing door (20) being provided with a locking portion corresponding to the electric bolt (80), the electric bolt (80) being configured to disconnect from the locking portion when power is turned off; A remote control component, the remote control component is electrically connected to the drive component (70) and the electric bolt (80), and the remote control component is suitable for obtaining a control signal and controlling the drive component (70) and the electric bolt (80).

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