A pressure relief device suitable for nuclear power plants

Abstract

This utility model discloses a pressure relief device suitable for nuclear power plants. The device includes a housing, a water droplet separator, a pressure regulating valve, a high-efficiency filter, an exhaust fan, a pressure measuring component, and pipelines connecting the water droplet separator, pressure regulating valve, and high-efficiency filter sequentially within the housing. The air inlet of the water droplet separator is connected to the pressure relief equipment, and the exhaust fan is located at the air outlet of the high-efficiency filter to discharge the filtered gas to the outside atmosphere. The pressure measuring component includes a first pressure sensor located at the front end of the water droplet separator, a second pressure sensor located at the rear end of the high-efficiency filter, and a pressure gauge mounted on the housing and electrically connected to the first and second pressure sensors. This utility model, through the water droplet separator, pressure regulating valve, high-efficiency filter, exhaust fan, and pressure measuring component, can quickly achieve pressure relief and filtration operations. The pressure relief device is small in size, easy to move at the work site, and avoids secondary pollution of personnel or the environment.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to a pressure relief device suitable for nuclear power. Background Technology

[0002] After the sealing test of Class B and C penetrations of the nuclear power plant containment vessel, the test exhaust gas inside the penetrations must be discharged. The pressurized exhaust gas mainly consists of air, aerosols, and water. Among them, aerosols and water may contain radioactive materials and must be filtered and purified before being safely discharged into the working environment. At present, there are no specialized tools for depressurization operations of Class B and C penetrations of the nuclear power plant containment vessel. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pressure relief device suitable for nuclear power plants.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A pressure relief device suitable for nuclear power plants, comprising:

[0006] The housing includes a water droplet separator, a pressure regulating valve, a high-efficiency filter, an exhaust fan, a pressure measuring component, and pipelines that sequentially connect the water droplet separator, the pressure regulating valve, and the high-efficiency filter. The air inlet of the water droplet separator is connected to a pressure relief device, and the exhaust fan is located at the air outlet of the high-efficiency filter to discharge the filtered gas to the outside atmosphere. The pressure measuring component includes a first pressure sensor located at the front end of the water droplet separator, a second pressure sensor located at the rear end of the high-efficiency filter, and a pressure gauge located on the housing and electrically connected to the first and second pressure sensors.

[0007] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, preferably, a quick-connect pipe fitting is also provided on the shell, and the quick-connect pipe fitting is connected to the water droplet separator through the pipeline to quickly connect to the interface of the pressure relief equipment.

[0008] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, the first pressure sensor is preferably located on the pipeline between the quick-connect fitting and the water droplet separator, and the second pressure sensor is located on the side of the high-efficiency filter near the outlet.

[0009] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, preferably, a support frame and a battery mounted on the support frame are also provided inside the housing, and the battery is electrically connected to the pressure regulating valve, the exhaust fan and the pressure gauge respectively.

[0010] Furthermore, in the aforementioned pressure relief device suitable for nuclear power plants, the high-efficiency filter is preferably a nuclear-grade high-efficiency air filter.

[0011] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, the high-efficiency filter preferably includes a housing, a filter element, an inspection port, an air inlet, and a sealing plate;

[0012] The housing is disposed inside the shell, the filter element is disposed inside the housing, the inspection port is disposed on the outer surface of the shell, the air inlet and the air outlet are respectively symmetrically disposed on two opposite sides of the housing and respectively located on two opposite sides of the filter element, and the sealing plate is sealed and installed on the inspection port.

[0013] Furthermore, in the aforementioned pressure relief device suitable for nuclear power plants, a protective bag is preferably provided on the side of the casing near the inspection port.

[0014] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, preferably, an air outlet is also provided on one side of the shell, and the exhaust fan is located between the air outlet and the air outlet.

[0015] Furthermore, in the aforementioned pressure relief device suitable for nuclear power, the housing preferably includes a body with a single-sided opening, a detachable cover plate disposed on the single-sided opening of the body, and a handle disposed on the body.

[0016] Furthermore, in the aforementioned pressure relief device suitable for nuclear power plants, it is preferable that the diameter of the pipeline is the same as the diameter of the quick-connect fitting.

[0017] The following are the beneficial effects of implementing this utility model: pressure relief and filtration operations can be quickly achieved through water droplet separators, pressure regulating valves, high-efficiency filters, exhaust fans and pressure measuring components. The pressure relief device is small in size, easy to move, install and store at the work site, and avoids secondary pollution of personnel or the environment. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a pressure relief device suitable for nuclear power plants, according to some embodiments of this utility model;

[0020] Figure 2 yes Figure 1 The diagram shows the three-dimensional structure after the sealing plate has been removed.

[0021] Figure 3 yes Figure 2 The diagram shows the three-dimensional structure after the cover plate has been removed.

[0022] Figure 4 yes Figure 1 The diagram shows a cross-sectional view of the structure.

[0023] Figure 5 yes Figure 2 The diagram shows a three-dimensional structure of a high-efficiency filter. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The technical solution adopted by this utility model to solve its technical problem is:

[0028] like Figures 1 to 3 As shown, some embodiments of this utility model disclose a pressure relief device suitable for nuclear power plants. In some embodiments, this pressure relief device may include a housing 10, a water droplet separator 20, a pressure regulating valve 30, a high-efficiency filter 40, an exhaust fan 50, a pressure measuring component 80, a pipeline 60, and a quick-connect fitting 70. The quick-connect fitting 70, water droplet separator 20, pressure regulating valve 30, and high-efficiency filter 40 are sequentially connected via the pipeline 60 and are respectively disposed within the housing 10. The exhaust fan 50 is installed at the outlet 45 of the high-efficiency filter 40 and discharges the filtered gas to the outside atmosphere. Understandably, the pressure relief port of the pressure relief device is connected to the quick-connect fitting 70 of the pipeline. The exhaust fan 50 generates negative pressure. The gas in the pressure relief device passes through the water droplet separator 20 to remove water droplets from the exhaust gas. Then, it passes through the pressure regulating valve 30 to adjust the pressure to the working pressure of the high-efficiency filter 40. The exhaust gas after the pressure adjustment enters the high-efficiency filter 40 to filter aerosols, radioactive substances, etc. Finally, the negative pressure generated by the exhaust fan 50 discharges the filtered harmless gas into the external environment.

[0029] Continue to refer to Figure 1 and Figure 3 In some embodiments, the housing 10 may include an air outlet 11, a body 12, a cover 13, a handle 14, and a bracket 15. The air outlet 11 is located on one side of the body 12 and is used in conjunction with the exhaust fan 50 to discharge filtered gas to the outside atmosphere. The body 12 has a single-sided opening structure, and the cover 13 is detachably installed at the single-sided opening of the body 12 to facilitate disassembly and maintenance in case of damage to the equipment inside the body 12. The handle 14 is located on the body 12 for easy transport of the pressure relief device. The bracket 15 is located inside the body 12 for securing internal equipment. The housing 10 is used to install and secure all components. The housing 10 has a compact design, maximizing the use of its internal space. Except for the air inlet, inspection port, and air outlet 11, there are no other leakage points, ensuring filtration efficiency and airtight protection. The cover 13 of the housing 10 is designed for easy disassembly, facilitating equipment inspection, maintenance, and cleaning.

[0030] Refer again Figure 3 The quick-connect pipe fitting 70 is installed on the side of the main body 12 away from the air outlet 11. The pipe diameter of the quick-connect pipe fitting 70 matches the pipe diameter of the pressure relief port pipe of the pressure relief equipment, and can be quickly connected to the pressure relief port pipe of the pressure relief equipment to improve operating efficiency.

[0031] like Figure 4As shown, in some embodiments, pipeline 60 connects quick-connect fitting 70, water droplet separator 20, pressure regulating valve 30, and HEPA filter 40 in sequence. The pipe diameter of quick-connect fitting 70 is the same as that of pipeline 60, and the same pipe diameter design avoids sudden changes in exhaust gas pressure. The quick-connect fitting 70 of the same pipe diameter extends from the beginning to before the HEPA filter 40, ensuring that the water droplets contained in the exhaust gas are quickly and effectively removed before the HEPA filter 40, while ensuring the sealing of the front end of the HEPA filter 40.

[0032] In some embodiments, the water droplet separator 20 employs a dedicated filter element for removing water droplets and has ample internal space, achieving a water droplet removal rate of 99%. The filtered water can be temporarily stored in the water droplet separator 20 or discharged from the housing 10 via a drain pipe. The function of the water droplet separator 20 is to filter water droplets from the exhaust gas, thereby extending the lifespan of the downstream high-efficiency filter 40.

[0033] In some embodiments, since the exhaust gas pressure is ≥4.5 bar.g, even after the initial pressure reduction by the water droplet separator 20, the pressure is still higher than the normal operating pressure of the high-efficiency filter 40. Therefore, a pressure regulating valve 30 is selected to reduce the exhaust gas pressure to the operating pressure of the high-efficiency filter 40.

[0034] For reference Figure 5 In some embodiments, the high-efficiency filter 40 is a nuclear-grade high-efficiency air filter. In some embodiments, the high-efficiency filter 40 may include a housing 41, a filter element 42, an inspection port 43, an air inlet 44, and a sealing plate 46. The housing 41 is disposed within the shell 10, the filter element 42 is disposed within the housing 41, the inspection port 43 is disposed on the outer surface of the shell 10, the air inlet 44 and the air outlet 45 are symmetrically disposed on two opposite sides of the housing 41 and on opposite sides of the filter element 42, respectively, a pipeline 60 connects to the air inlet 44, and the sealing plate 46 is sealed and installed on the inspection port 43. Understandably, the gas regulated by the pressure regulating valve 30 enters the housing 41 through the pipeline 60 and the air inlet 44. Aerosols, radioactive substances, etc., in the exhaust gas are filtered and adsorbed by the filter element 42, and the remaining harmless substances are discharged through the air outlet 45.

[0035] In some embodiments, a protective bag is provided on the housing 10 near the inspection port 43, and the filter element 42 is placed in the protective bag when it is replaced. Understandably, the filter element 42 replacement uses a bag-in, bag-out system, which is a safety-protected filtration system. Its characteristic is that the replacement of the filter element 42 of the high-efficiency filter 40 is carried out in the protective bag, which can prevent radioactive aerosols and dust inside the housing 41 from spilling outside the housing 41, thereby protecting operators and the environment from secondary pollution by exhaust gases.

[0036] like Figure 3As shown, in some embodiments, the exhaust fan 50 is disposed between the air outlet 45 and the air outlet 11. The exhaust fan 50 always provides the negative pressure environment required by the high-efficiency filter 40 and accelerates the discharge of the filtered gas into the exhaust housing 10.

[0037] Referring again to 3, in some embodiments, the pressure measuring component 80 may include a first pressure sensor 81, a second pressure sensor 82, and a pressure gauge 83. The first pressure sensor 81 is disposed on the pipeline 60 between the quick-connect fitting 70 and the water droplet separator 20, and the second pressure sensor 82 is disposed on the side of the high-efficiency filter 40 near the outlet 45. The pressure gauge 83 is connected to both the first pressure sensor 81 and the second pressure sensor 82, and is used to display the pressure difference between the first pressure sensor 81 and the second pressure sensor 82. The first pressure sensor 81 and the second pressure sensor 82 are respectively disposed behind the quick-connect fitting 70 and the high-efficiency filter 40. The pressure difference between the first pressure sensor 81 and the second pressure sensor 82 is calculated and displayed by the pressure gauge 83 to monitor the pressure change of the exhaust gas in the pressure relief device. The pressure difference between the two also represents the lifespan of the filter element 42. When the pressure difference is greater than a set value, it indicates that the filter element 42 should be replaced.

[0038] Refer again Figure 3 In some embodiments, the pressure relief device of this nuclear power plant also includes a battery 90. A bracket 15 and the battery 90 mounted on the bracket 15 are also provided inside the housing 10. The battery 90 is electrically connected to the pressure regulating valve 30, the exhaust fan 50, and the pressure gauge 83, respectively, and provides them with power to facilitate their operation. The first pressure sensor 81 and the second pressure sensor 82 are electrically connected to the pressure gauge 83, and the power required by the first pressure sensor 81 and the second pressure sensor 82 is provided by the pressure gauge 83.

[0039] The following section will further explain this pressure relief device suitable for nuclear power plants in conjunction with its usage.

[0040] When using the pressure relief device suitable for nuclear power plants: connect the pressure relief port pipe of the pressure relief device to the quick-connect fitting 70; turn on the power switch of the pressure relief device and set the alarm pressure differential; turn on the pressure relief switch of the pressure relief device to start automatic pressure relief, and the water droplet separator 20, pressure regulating valve 30, high-efficiency filter 40, and exhaust fan 50 perform pressure relief, separation, and filtration work.

[0041] If the pressure at the quick-connect fitting 70 drops to atmospheric pressure, the pressure relief switch of the pressure relief device will automatically close, and the pressure relief operation will end. If a differential pressure alarm is triggered, the operator must turn off the power switch of this pressure relief device, open the inspection port 43, and replace the filter element 42 of the high-efficiency filter 40 using a bag-in-bag-out operation, or open the drain valve of the water droplet separator 20 to drain the filtered water. After replacement, turn on the power switch of this pressure relief device and continue the pressure relief operation. If the battery 90 is low, it needs to be charged promptly or replaced with a spare battery.

[0042] It should be noted that, for those skilled in the art, without departing from the concept of this utility model, the above-mentioned technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this utility model.

Claims

1. A pressure relief device suitable for nuclear power plants, characterized in that, include: The housing (10) includes a water droplet separator (20), a pressure regulating valve (30), a high-efficiency filter (40), an exhaust fan (50), a pressure measuring component (80) disposed within the housing (10), and a pipeline (60) that sequentially connects the water droplet separator (20), the pressure regulating valve (30), and the high-efficiency filter (40). The air inlet of the water droplet separator (20) is connected to a pressure relief device. The exhaust fan (50) is disposed at the air outlet (45) of the high-efficiency filter (40) to discharge the filtered gas to the outside atmosphere. The pressure measuring component (80) includes a first pressure sensor (81) disposed at the front end of the water droplet separator (20), a second pressure sensor (82) disposed at the rear end of the high-efficiency filter (40), and a pressure gauge (83) disposed on the housing (10) and electrically connected to the first pressure sensor (81) and the second pressure sensor (82).

2. The pressure relief device for nuclear power plants according to claim 1, characterized in that, The housing (10) is also provided with a quick-connect pipe connector (70), which is connected to the water droplet separator (20) through the pipeline (60) to quickly connect to the interface of the pressure relief device.

3. The pressure relief device suitable for nuclear power plants according to claim 2, characterized in that, The first pressure sensor (81) is installed on the pipeline (60) between the quick-connect fitting (70) and the water droplet separator (20), and the second pressure sensor (82) is installed on the side of the high-efficiency filter (40) near the air outlet (45).

4. The pressure relief device suitable for nuclear power plants according to claim 3, characterized in that, The housing (10) is also provided with a bracket (15) and a battery (90) installed on the bracket (15). The battery (90) is electrically connected to the pressure regulating valve (30), the exhaust fan (50) and the pressure gauge (83).

5. The pressure relief device for nuclear power plants according to claim 1, characterized in that, The high-efficiency filter (40) is a nuclear-grade high-efficiency air filter.

6. The pressure relief device suitable for nuclear power plants according to claim 1, characterized in that, The high-efficiency filter (40) includes a housing (41), a filter element (42), an inspection port (43), an air inlet (44), and a sealing plate (46); The housing (41) is disposed inside the shell (10), the filter element (42) is disposed inside the housing (41), the inspection port (43) is disposed on the outer surface of the shell (10), the air inlet (44) and the air outlet (45) are respectively symmetrically disposed on two opposite sides of the housing (41) and respectively located on two opposite sides of the filter element (42), and the sealing plate (46) is sealed and installed on the inspection port (43).

7. The pressure relief device for nuclear power plants according to claim 6, characterized in that, A protective bag is provided on the side of the housing (10) near the inspection port (43).

8. The pressure relief device for nuclear power plants according to claim 1, characterized in that, An air outlet (11) is provided on one side of the housing (10), and the exhaust fan (50) is located between the air outlet (45) and the air outlet (11).

9. The pressure relief device for nuclear power plants according to claim 1, characterized in that, The housing (10) includes a body (12) with a single-sided opening, a cover plate (13) detachably disposed on the single-sided opening of the body (12), and a handle (14) disposed on the body (12).

10. The pressure relief device for nuclear power plants according to claim 2, characterized in that, The diameter of the pipeline (60) is the same as the diameter of the quick-connect fitting (70).

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