Emergency air compressor system of nuclear power plant and air compressor test system thereof

Abstract

The utility model relates to a nuclear power plant emergency air compressor system and an air compressor test system thereof, the nuclear power plant emergency air compressor system comprises a plurality of air compressors and a drying unit used for drying compressed air output by the air compressors, and the air compressor test system comprises a plurality of pressure detection units corresponding to the air compressors one by one; the pipeline switching unit is connected with the air inlet and the air outlet of the drying unit and the plurality of pressure detection units; and the pressure relief unit is connected with the plurality of air compressors. According to the utility model, the air compressors do not influence each other, so that the functions of the air compressors can be tested under the condition that all the air compressors are not switched off, and the air supply stability, safety and reliability of the nuclear power plant are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power equipment maintenance, in particular to an emergency air compressor system of a nuclear power plant and an air compressor test system thereof. Background Art

[0002] In a nuclear power plant, when the compressed air system is abnormal, the emergency air compressor system of the nuclear power plant is used to supplement the air for driving pneumatic equipment. In order to ensure the normal operation of the pneumatic equipment, it is necessary to regularly test the emergency air compressor system of the nuclear power plant to ensure that the system can start normally when the pneumatic equipment is underpressure and stop operating when the compressed air pressure of the pneumatic equipment is too high.

[0003] In the related art, the emergency air compressor systems in some nuclear power plants include a plurality of emergency air compressors (referred to as emergency air compressors or air compressors for short). Although these emergency air compressors are respectively provided with independent pressure detection devices to monitor their pressures, these pressure detection devices share a compressed air pipeline, so that different pressure detection devices will affect each other. To avoid the misoperation of the non-tested emergency air compressors during the test of the function of one emergency air compressor, it is necessary to withdraw the non-tested emergency air compressors from operation during the test of one emergency air compressor. This results in all emergency air compressors being unavailable during the test, which is equivalent to the failure of the emergency air compressor system of the nuclear power plant. Undoubtedly, this will reduce the safety of the nuclear power plant, and the rotation of the emergency air compressors for withdrawal not only makes the operation complicated, but also increases the risk of human error. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an emergency air compressor system of a nuclear power plant and an air compressor test system thereof.

[0005] The technical solution adopted by the utility model to solve its technical problem is to construct an air compressor test system for the emergency air compressor system of a nuclear power plant. The emergency air compressor system of the nuclear power plant includes a plurality of air compressors and a drying unit for drying the compressed air output by the air compressors. The air compressor test system includes:

[0006] A plurality of pressure detection units, corresponding to the plurality of air compressors one by one, for collecting the air pressure at the inlet or outlet of the drying unit when the corresponding air compressor is being tested;

[0007] A pipeline transfer unit, connected to the inlet and outlet of the drying unit and the plurality of pressure detection units, for connecting the outlet of the drying unit to the pressure detection unit corresponding to the air compressor being tested and connecting the inlet of the drying unit to the pressure detection units corresponding to other air compressors when testing one air compressor; and

[0008] A pressure relief unit, connected to a plurality of the air compressors, for selectively relieving the pressure of the compressed air output by the air compressors during the test, so as to cooperate with the air compressors to vary the air pressure at the air outlet of the drying unit within a certain range to implement the test work.

[0009] Preferably, the pipeline transfer unit includes:

[0010] A first valve assembly, the first end of the first valve assembly is connected to a plurality of the air compressors, and the second end is connected to the air inlet of the drying unit. The first valve assembly is used to prevent the compressed air output by the plurality of air compressors from being input into the drying unit during the test of one of the air compressors, and to make the air pressure at the first end of the first valve assembly consistent with the air pressure at the air inlet of the drying unit;

[0011] A second valve assembly, the second valve assembly includes a first input end and a plurality of first output ends. The first input end is connected to the first end of the first valve assembly, and the plurality of first output ends are respectively connected to a plurality of the pressure detection units. The second valve assembly is used to connect the first input end to the first output end connected to the pressure detection unit corresponding to the air compressor under test when measuring the air pressure at the air inlet of the drying unit during the test of one of the air compressors;

[0012] A third valve assembly, the third valve assembly includes a second input end and a plurality of second output ends. The second input end is connected to the air outlet of the drying unit, and the plurality of second output ends are respectively connected to a plurality of the pressure detection units. The third valve assembly is used to connect the second input end to the second output end connected to the pressure detection unit corresponding to the air compressor under test when measuring the air pressure at the air outlet of the drying unit during the test of one of the air compressors.

[0013] Preferably, the first valve assembly includes:

[0014] A first valve, the first end of the first valve is simultaneously connected to each of the air compressors, and the second end of the first valve is connected to the air inlet of the drying unit. The first valve is used to close during the test of one of the air compressors to prevent the compressed air output by the air compressor under test from being input into the air inlet of the drying unit; and

[0015] A check valve, connected in parallel with the first valve, for making the air pressure at the air outlet of the drying unit consistent with the air pressure at the first end of the first valve after the first valve is closed.

[0016] Preferably, the second valve assembly includes:

[0017] A plurality of second valves, corresponding to the plurality of pressure detection units one by one, a first end of each of the second valves is simultaneously connected to the first end of the first valve, and a second end of each of the second valves is respectively connected to the pressure detection unit one by one;

[0018] The third valve assembly includes:

[0019] A plurality of third valves, corresponding to the plurality of pressure detection units one by one, a first end of each of the third valves is simultaneously connected to the air outlet of the drying unit, and a second end of each of the third valves is respectively connected to the pressure detection unit one by one.

[0020] Preferably, each of the pressure detection units includes:

[0021] A first pressure gauge, connected to the pipeline transfer unit, for collecting the air pressure at the air inlet or air outlet of the drying unit.

[0022] Preferably, each of the pressure detection units further includes:

[0023] A first pressure switch, connected to the first pressure gauge, for outputting a control signal capable of controlling the start of the air compressor in the load mode test process when the pressure at the air outlet of the drying unit is less than a first set pressure during the load mode test process of one of the air compressors, and for outputting a control signal capable of controlling the shutdown of the air compressor in the load mode test process when the pressure at the air outlet of the drying unit is greater than a second set pressure, wherein the first set pressure is less than the second set pressure; and

[0024] A second pressure switch, connected to the first pressure gauge, for outputting a control signal capable of controlling the start of the air compressor in the standby mode test process when the pressure at the air outlet of the drying unit is less than a third set pressure during the standby mode test process of one of the air compressors, and for outputting a control signal capable of controlling the shutdown of the air compressor in the standby mode test process when the pressure at the air outlet of the drying unit is greater than a fourth set pressure, wherein the third set pressure is less than the first set pressure, and the fourth set pressure is greater than the third set pressure and less than the second set pressure.

[0025] Preferably, the pressure relief unit includes:

[0026] A regulating valve, connected to the pipeline transfer unit, for regulating the discharge amount of the compressed air output by the air compressor during the test.

[0027] Preferably, the pressure relief unit further includes:

[0028] A sixth valve, the first end of the sixth valve is connected to the output port of the regulating valve, and the sixth valve is used to discharge compressed air through its second end when it is turned on.

[0029] The present utility model also constructs an emergency air compressor system for a nuclear power plant, and the emergency air compressor system for a nuclear power plant includes:

[0030] Multiple air compressors;

[0031] A drying unit for drying the compressed air output by the air compressor; and

[0032] The air compressor test system as described above.

[0033] Preferably, the emergency air compressor system for a nuclear power plant further includes:

[0034] Multiple fourth valves, corresponding to the multiple air compressors one by one, each fourth valve is connected in series between the corresponding air compressor and the intake port of the drying unit one by one, and each fourth valve is used to turn on when the corresponding air compressor is put into operation, and turn off when the corresponding air compressor is taken out of service; and

[0035] A fifth valve, the first end of the fifth valve is connected to the outlet of the drying unit, and the second end of the fifth valve is used to output instrument compressed air.

[0036] Implementing the present utility model has the following beneficial effects: it can make each air compressor not affect each other, so as to test the functions of the air compressors without taking all the air compressors out of service, reducing the risk of human error, and playing a positive role in improving the air supply stability, safety and reliability of the nuclear power plant. Description of the Drawings

[0037] The following will further illustrate the present utility model in conjunction with the drawings and embodiments. In the drawings:

[0038] Figure 1 is a schematic structural diagram of an emergency air compressor system for a nuclear power plant in some embodiments of the present utility model. Detailed Embodiments

[0039] In order to have a clearer understanding of the technical features, objectives and effects of the present utility model, the detailed embodiments of the present utility model will now be described in detail with reference to the drawings.

[0040] In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation. This is only for the convenience of describing the technical solution and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0041] The present utility model provides an air compressor test system, which is applied to the emergency air compressor system of a nuclear power plant, such as Figure 1 As shown, the emergency air compressor system of the nuclear power plant includes a plurality of air compressors 21 and a drying unit 22. Among them, the drying unit 22 is used to dry the output air of the air compressors 21 and supply compressed air to pneumatic devices (including instruments, pneumatic valves, etc.) through a pipe network 25. This air compressor test system can test the functions of the air compressors 21 without affecting each other, which helps to improve the air supply stability of the emergency air compressor system of the nuclear power plant.

[0042] It should be noted that the working mode of each air compressor 21 can include a load mode and a standby mode. If a certain air compressor 21 is in the load mode, when the air pressure in the pipe network 25 drops below the first set pressure, the air compressor 21 in the load mode test process will change from the shutdown state to the startup state, thereby increasing the air pressure in the pipe network 25. When the air pressure in the pipe network 25 rises above the second set pressure, the air compressor 21 in the load mode test process will change from the startup state to the shutdown state, thereby reducing the air pressure in the pipe network 25. If a certain air compressor 21 is in the standby mode, when the air pressure in the pipe network 25 drops below the third set pressure, the air compressor 21 in the standby mode test process will change from the shutdown state to the startup state. When the air pressure in the pipe network 25 rises above the fourth set pressure, the air compressor 21 in the standby mode test process will change from the startup state to the shutdown state.

[0043] The range of the first set pressure can be from 6.6 bar.g to 7 bar.g, and the preferred set value is 6.8 bar.g. The range of the second set pressure can be from 7.3 bar.g to 7.7 bar.g, and the preferred set value is 7.5 bar.g. The range of the third set pressure can be from 6.4 bar.g to 6.8 bar.g, and the preferred set value is 6.6 bar.g. The range of the fourth set pressure can be from 7.1 bar.g to 7.5 bar.g, and the preferred set value is 7.3 bar.g. Among them, the first set pressure needs to be configured as a pressure value greater than the third set pressure, and the second set pressure needs to be configured as a pressure value greater than the fourth set pressure.

[0044] It should be noted that the test principle of each air compressor 21 is as follows: The air compressor 21 to be tested is controlled to operate in the load mode and / or standby mode. Under the corresponding module, by changing the air pressure in the pipe network 25 within a certain range, it is observed whether the air compressor 21 to be tested can perform operations normally when the air pressure in the pipe network 25 changes to the corresponding set pressure. Taking an air compressor 21 operating in the load mode as an example, assuming that the set value of the first set pressure is 6.8 bar.g and the set value of the second set pressure is 7.5 bar.g, when the air pressure in the pipe network 25 can change from the shutdown state to the startup state when it drops below 6.8 bar.g, and when the air pressure in the pipe network 25 can change from the startup state to the shutdown state when it rises above 7.5 bar.g, then it can be determined that the air compressor 21 functions normally in the load mode.

[0045] Please refer to Figure 1 , the air compressor test system may include a pipeline transfer unit 12, a pressure relief unit 13, and multiple pressure detection units 11.

[0046] Please refer to Figure 1 , the multiple pressure detection units 11 correspond to the multiple air compressors 21 one by one. Each pressure detection unit 11 is used to collect the air pressure at the inlet or outlet of the drying unit 22 of the corresponding air compressor 21 during the test. It should be noted that the outlet of the drying unit 22 is connected to the pneumatic equipment through the pipe network 25, and the air pressure at the outlet of the drying unit 22 is equivalent to the air pressure in the pipe network 25.

[0047] It can be understood that the pressure detection unit 11 not only participates in the test process of the air compressor 21, but can also participate in the daily work of the emergency air compressor system in the nuclear power plant. That is, during daily work, the corresponding air compressor 21 can be controlled to start or stop through the collected data of the pressure detection unit 11.

[0048] In some embodiments, as Figure 1 shown, each pressure detection unit 11 may include a first pressure gauge 111. The first pressure gauge 111 is connected to the pipeline transfer unit 12, and the first pressure gauge 111 is used to collect the air pressure at the inlet or outlet of the drying unit 22. Specifically, the first pressure gauge 111 is connected to the second end of a second valve 1221 and the second end of a third valve 1231 in the pipeline transfer unit 12.

[0049] In order to enable the air compressor 21 to automatically start and stop, in some embodiments, as Figure 1 shown, each pressure detection unit 11 may further include a first pressure switch 112 and a second pressure switch 113.

[0050] The first pressure switch 112 is connected to the first pressure gauge 111. The first pressure switch 112 is configured to output a control signal for starting the air compressor 21 in the load mode test process when the pressure at the outlet of the drying unit 22 is less than the first set pressure, and to output a control signal for stopping the air compressor 21 in the load mode test process when the pressure at the outlet of the drying unit 22 is greater than the second set pressure. The second pressure switch 113 is connected to the first pressure gauge 111. The second pressure switch 113 is configured to output a control signal for starting the air compressor 21 in the standby mode test process when the pressure at the outlet of the drying unit 22 is less than the third set pressure, and to output a control signal for stopping the air compressor 21 in the standby mode test process when the pressure at the outlet of the drying unit 22 is greater than the fourth set pressure. Among them, the first pressure switch 112 and the second pressure switch 113 can be existing pressure switches. Of course, the first pressure switch 112 and the second pressure switch 113 can also be composed of an existing air pressure sensor and a Schmidt comparator, as long as corresponding control signals can be issued when the pressure reaches two different thresholds. In addition, the control signals output by the first pressure switch 112 and the second pressure switch 113 can be input into a control module (not shown) included in the nuclear power plant emergency air compressor system, so that the control module can control the start or stop of each air compressor according to the control signals. The specific control process of the control module can refer to the existing technology and will not be elaborated here.

[0051] In some embodiments, as Figure 1 shown, each pressure detection unit 11 may further include a redundant pressure switch 114. The redundant pressure switch 114 is connected to the first pressure gauge 111. The function of the redundant pressure switch 114 is to replace the faulty pressure switch when the first pressure switch 112 or the second pressure switch 113 fails, so as to improve the reliability of the nuclear power plant emergency air compressor system.

[0052] In some embodiments, as Figure 1 shown, the number of pressure detection units 11 can be 2.

[0053] Please refer to Figure 1, the pipeline transfer unit 12 is connected to the air inlet and outlet of the drying unit 22 and multiple pressure detection units 11. The pipeline transfer unit 12 is used to connect the air outlet of the drying unit 22 to the pressure detection unit 11 corresponding to the air compressor 21 being tested and connect the air inlet of the drying unit 22 to the pressure detection unit 11 corresponding to the other air compressors 21 when testing one of the air compressors 21. When testing one of the air compressors 21, the air compressors 21 not being tested can still collect the air pressure at the air inlet of the drying unit 22 through the corresponding pressure detection units 11, and then determine whether to start or stop based on this air pressure.

[0054] For the convenience of understanding the specific functions of the pipeline transfer unit 12, the following will take Figure 1 as an example to illustrate: For example, when testing the air compressor A1, the pipeline transfer unit 12 will connect the air outlet of the drying unit 22 to the pressure detection unit B1 corresponding to the air compressor A1, so that the pressure detection unit B1 can collect the air pressure at the air outlet of the drying unit 22. At the same time, it will also connect the air inlet of the drying unit 22 to the pressure detection unit B2 corresponding to the air compressor A2, so that the pressure detection unit B2 can collect the air pressure at the air inlet of the drying unit 22. It should be noted that the air pressure at the air inlet of the drying unit 22 is basically the same as the air pressure at its air outlet. When testing the air compressor A1, the air compressor A2 can still determine whether to start or stop based on the change in the air pressure at the air inlet of the drying unit 22, that is, the air compressor A2 remains in an available state and is not affected by the air compressor 21 being used. It can be understood that during the test of the air compressor A1, when the compressed air system is abnormal and emergency air compressor boosting is required, the air compressor A2 can be normally started, so that compressed air for work can be supplied to the pneumatic equipment, improving the air supply stability and playing a positive role in improving the safety and reliability of the nuclear power plant.

[0055] In some embodiments, as Figure 1 shown, the pipeline transfer unit 12 may include a first valve assembly 121, a second valve assembly 122, and a third valve assembly 123.

[0056] Please refer to Figure 1 , the first end of the first valve assembly 121 is connected to multiple air compressors 21, and the second end is connected to the air inlet of the drying unit 22. The first valve assembly 121 is used to prevent the compressed air output by the multiple air compressors 21 from entering the drying unit 22 during the test of one of the air compressors 21 and keep the air pressure at the first end of the first valve assembly 121 consistent with the air pressure at the air inlet of the drying unit 22.

[0057] Furthermore, as Figure 1As shown, the first valve assembly 121 may include a first valve 1211 and a check valve 1212.

[0058] Please refer to Figure 1 , the first end of the first valve 1211 is simultaneously connected to each air compressor 21, and the second end of the first valve 1211 is connected to the air inlet of the drying unit 22. The first valve 1211 is used to close during the test of one of the air compressors 21 to prevent the compressed air output by the tested air compressor 21 from being input to the air inlet of the drying unit 22. Among them, the first valve 1211 may be an existing manual valve or an electric valve, preferably a manual valve.

[0059] Please refer to Figure 1 , the check valve 1212 is connected in parallel with the first valve 1211. The check valve 1212 is used to make the air pressure at the air outlet of the drying unit 22 consistent with the air pressure at the first end of the first valve 1211 after the first valve 1211 is closed. Specifically, after the first valve 1211 is closed, when the air pressure at the port of the check valve 1212 connected to the first end of the first valve 1211 is greater than the air pressure at the port connected to the second end of the first valve 1211, the compressed gas will be discharged through the check valve 1212 to the second end of the first valve 1211, thereby making the air pressure at the air outlet (and air inlet) of the drying unit 22 consistent with the air pressure at the first end of the first valve 1211.

[0060] Please refer to Figure 1 , the second valve assembly 122 may include a first input end and a plurality of first output ends. The first input end is connected to the first end of the first valve assembly 121, and the plurality of first output ends are respectively connected to a plurality of pressure detection units 11 one by one. The second valve assembly 122 is used to connect the first input end to the first output end connected to the pressure detection unit 11 corresponding to the tested air compressor 21 when measuring the air pressure at the air inlet of the drying unit 22 during the test of one of the air compressors 21.

[0061] Furthermore, as Figure 1 shown, the second valve assembly 122 may include a plurality of second valves 1221. The plurality of second valves 1221 correspond to the plurality of pressure detection units 11 one by one. The first end of each second valve 1221 is simultaneously connected to the first end of the first valve 1211, and the second end of each second valve 1221 is respectively connected to the pressure detection unit 11 one by one. Each second valve 1221 is used to control the second valve 1221 connected to the pressure detection unit 11 corresponding to the tested air compressor 21 to conduct and control the remaining second valves 1221 to close when testing one of the air compressors 21. To Figure 1For example, when testing the air compressor A1, the second valve 1221 connected to the pressure detection unit B1 is controlled to be turned on, and the second valve 1221 connected to the pressure detection unit B2 is controlled to be turned off. Among them, the second valve 1221 can be an existing manual valve or an electric valve, preferably a manual valve.

[0062] It should be noted that the node corresponding to the connection of the first end of each second valve 1221 is the first input end of the second valve assembly 122, and the second end of each second valve 1221 corresponds to a first output end of the second valve assembly 122.

[0063] Please refer to Figure 1 , the third valve assembly 123, the third valve assembly 123 includes a second input end and a plurality of second output ends. The second input end is connected to the air outlet of the drying unit 22, and the plurality of second output ends are respectively connected to the plurality of pressure detection units 11 one by one. The third valve assembly 123 is used to connect the second input end to the second output end connected to the pressure detection unit 11 corresponding to the air compressor 21 being tested when measuring the air pressure at the air outlet of the drying unit 22 during the test of one of the air compressors 21.

[0064] Furthermore, as Figure 1 shown, the third valve assembly 123 may include a plurality of third valves 1231. The plurality of third valves 1231 correspond to the plurality of pressure detection units 11 one by one. The first end of each third valve 1231 is simultaneously connected to the air outlet of the drying unit 22, and the second end of each third valve 1231 is respectively connected to the pressure detection unit 11 one by one. Each third valve 1231 is used to control the third valve 1231 connected to the pressure detection unit 11 corresponding to the air compressor 21 being tested to be turned off and control the remaining third valves 1231 to be turned on during the test of one of the air compressors 21. For Figure 1 example, when testing the air compressor A1, the third valve 1231 connected to the pressure detection unit B1 is controlled to be turned off, and the third valve 1231 connected to the pressure detection unit B2 is controlled to be turned on. Among them, the third valve 1231 can be an existing manual valve or an electric valve, preferably a manual valve.

[0065] It should be noted that the node corresponding to the connection of the first end of each third valve 1231 is the second input end of the third valve assembly 123, and the second end of each third valve 1231 corresponds to a second output end of the third valve assembly 123.

[0066] Please refer to Figure 1, the pressure relief unit 13 is connected to multiple air compressors 21. The pressure relief unit 13 is used to selectively relieve the pressure of the compressed air output by the air compressors 21 during the test, so as to cooperate with the air compressors 21 to make the air pressure at the air outlet of the drying unit 22 (equivalent to the air pressure of the pipeline network 25) vary within a certain range to implement the test work. Specifically, when the compressed air pressure needs to drop, the pressure relief unit 13 will relieve the compressed air, and when the compressed air pressure needs to rise, the release of the compressed air will stop.

[0067] In some embodiments, as Figure 1 shown, the pressure relief unit 13 may include a regulating valve 131 and a sixth valve 134. The input port of the regulating valve 131 is connected to the first end of the first valve 1211 in the pipeline transfer unit 12. The regulating valve 131 is used to regulate the discharge amount of the compressed air output by the air compressor 21 during the test. The first end of the sixth valve 134 is connected to the output port of the regulating valve 131. The sixth valve 134 is used to discharge the compressed air through its second end when it is turned on. Specifically, the sixth valve 134 closes to prevent the leakage of compressed air when there is no need to relieve the pressure of the compressed air, and is turned on to release the compressed air when the pressure of the compressed air needs to be relieved. Among them, the sixth valve 134 can be an existing manual valve or an electric valve, and preferably a manual valve.

[0068] Implementing the technical solution of the present invention, through the cooperation of the pipeline transfer unit, the pressure relief unit and multiple pressure detection units, the air pressure of the pipeline network varies within a certain range to facilitate the implementation of the test work. Moreover, when testing one of the air compressors, the untested air compressors can still use the corresponding pressure detection units to monitor the air pressure at the air outlet of the drying unit, so as to increase the supply air pressure by starting the untested air compressors when the pipeline network pressure is insufficient due to abnormalities in the compressed air system. Each air compressor does not affect each other, realizing the function test of the air compressor without withdrawing all the air compressors, reducing the risk of human error, and playing a positive role in improving the air supply stability, safety and reliability of the nuclear power plant.

[0069] As Figure 1 shown, the present invention also provides a nuclear power plant emergency air compressor system, which includes:

[0070] Multiple air compressors 21;

[0071] A drying unit 22 for drying the compressed air output by the air compressor 21; and

[0072] The air compressor test system provided by the embodiment of the present invention.

[0073] In some embodiments, as Figure 1As shown in the figure, the emergency air compressor system of the nuclear power plant may further include a fifth valve 24 and a plurality of fourth valves 23. The plurality of fourth valves 23 correspond to the plurality of air compressors 21 one by one. Each fourth valve 23 is connected in series between the corresponding air compressor 21 and the air inlet of the drying unit 22 in a one-to-one manner. Each fourth valve 23 is used to conduct when the corresponding air compressor 21 is put into operation, and to close when the corresponding air compressor 21 is taken out of service. The first end of the fifth valve 24 is connected to the air outlet of the drying unit 22, and the second end of the fifth valve 24 is used to output instrument air. Among them, both the fourth valve 23 and the fifth valve 24 can be existing manual valves or electric valves, preferably manual valves.

[0074] It should be noted that when the air compressor 21 is taken out of service, it means that the air compressor 21 has been set to an unavailable state; when the air compressor 21 is put into operation, the air compressor 21 is set to an available state.

[0075] In some embodiments, as Figure 1 shown, the drying unit 22 may include a plurality of dryers 221. The air inlet end of each dryer 221 is connected to the second end of the first valve 1211, and the air outlet end of each dryer 221 is connected to the first end of the fifth valve 24. Among them, the dryer 221 can be an existing air dryer. In addition, the number of dryers 221 can be two.

[0076] For the convenience of the test personnel to conduct tests on site of the air compressor 21, some pressure detection units 11 are set on site, which is not conducive to the personnel in the main control room to understand the on-site situation. In view of this, in some embodiments, as Figure 1 shown, the emergency air compressor system of the nuclear power plant may further include a pneumatic pressure acquisition unit 26. The pneumatic pressure acquisition unit 26 is connected to the air outlet of the drying unit 22 (i.e., the air outlet end of each dryer 221) to collect the pneumatic pressure of the air outlet of the drying unit 22 and output the pneumatic pressure of the air outlet to the human-machine interaction unit (such as a display screen) in the main control room, so that the personnel in the main control room can monitor the pneumatic pressure of the air outlet of the drying unit 22 in real time. Among them, the pneumatic pressure acquisition unit 26 can be an existing pressure transmitter or pressure gauge, etc.

[0077] It can be understood that the above embodiments only express the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. An air compressor test system for an emergency air compressor system in a nuclear power plant, the emergency air compressor system in the nuclear power plant comprising a plurality of air compressors (21) and a drying unit (22) for drying the compressed air output by the air compressors (21), characterized in that, The air compressor test system includes: A plurality of pressure detection units (11), corresponding to the plurality of air compressors (21) one by one, for collecting the air pressure at the inlet or outlet of the drying unit (22) of the corresponding air compressor (21) during the test; A pipeline transfer unit (12), connected to the inlet and outlet of the drying unit (22) and the plurality of pressure detection units (11), for connecting the outlet of the drying unit (22) to the pressure detection unit (11) corresponding to the air compressor (21) being tested and connecting the inlet of the drying unit (22) to the pressure detection units (11) corresponding to the other air compressors (21) when testing one of the air compressors (21); and A pressure relief unit (13), connected to the plurality of air compressors (21), for selectively relieving the compressed air output by the air compressors (21) during the test, so as to cooperate with the air compressors (21) to make the air pressure at the outlet of the drying unit (22) vary within a certain range to carry out the test work.

2. The air compressor test system according to claim 1, wherein The pipeline transfer unit (12) includes: A first valve assembly (121), the first end of the first valve assembly (121) is connected to the plurality of air compressors (21), and the second end is connected to the inlet of the drying unit (22). The first valve assembly (121) is used to prevent the compressed air output by the plurality of air compressors (21) from being input into the drying unit (22) during the test of one of the air compressors (21), and to make the air pressure at the first end of the first valve assembly (121) consistent with the air pressure at the inlet of the drying unit (22); A second valve assembly (122), the second valve assembly (122) includes a first input end and a plurality of first output ends. The first input end is connected to the first end of the first valve assembly (121), and the plurality of first output ends are connected to the plurality of pressure detection units (11) one by one. The second valve assembly (122) is used to connect the first output end where the first input end is connected to the pressure detection unit (11) corresponding to the air compressor (21) being tested when measuring the air pressure at the inlet of the drying unit (22) during the test of one of the air compressors (21); A third valve assembly (123), the third valve assembly (123) includes a second input end and a plurality of second output ends. The second input end is connected to the outlet of the drying unit (22), and the plurality of second output ends are connected to the plurality of pressure detection units (11) one by one. The third valve assembly (123) is used to connect the second output end where the second input end is connected to the pressure detection unit (11) corresponding to the air compressor (21) being tested when measuring the air pressure at the outlet of the drying unit (22) during the test of one of the air compressors (21).

3. The air compressor test system according to claim 2, wherein, The first valve assembly (121) includes: A first valve (1211), the first end of the first valve (1211) being simultaneously connected to each of the air compressors (21), the second end of the first valve (1211) being connected to the inlet of the drying unit (22), the first valve (1211) being configured to close during the test of one of the air compressors (21) to prevent the compressed air output by the air compressor (21) under test from being input to the inlet of the drying unit (22); and A check valve (1212), connected in parallel with the first valve (1211), configured to keep the air pressure at the outlet of the drying unit (22) consistent with the air pressure at the first end of the first valve (1211) after the first valve (1211) is closed.

4. The air compressor test system according to claim 3, wherein, The second valve assembly (122) includes: A plurality of second valves (1221), corresponding to the plurality of pressure detection units (11) one by one, the first end of each second valve (1221) being simultaneously connected to the first end of the first valve (1211), and the second end of each second valve (1221) being respectively connected to the pressure detection unit (11) one by one; The third valve assembly (123) includes: A plurality of third valves (1231), corresponding to the plurality of pressure detection units (11) one by one, the first end of each third valve (1231) being simultaneously connected to the outlet of the drying unit (22), and the second end of each third valve (1231) being respectively connected to the pressure detection unit (11) one by one.

5. The air compressor test system according to any one of claims 1 to 4, characterized in that, Each of the pressure detection units (11) includes: A first pressure gauge (111), connected to the pipeline transfer unit (12), configured to collect the air pressure at the inlet or outlet of the drying unit (22).

6. The air compressor test system according to claim 5, characterized in that Each of the pressure detection units (11) further includes: A first pressure switch (112), connected to the first pressure gauge (111), configured to output a control signal capable of controlling the start of the air compressor (21) in the load mode test when the pressure at the outlet of the drying unit (22) is less than a first set pressure, and output a control signal capable of controlling the shutdown of the air compressor (21) in the load mode test when the pressure at the outlet of the drying unit (22) is greater than a second set pressure during the test of one of the air compressors (21) in the load mode, wherein the first set pressure is less than the second set pressure; and A second pressure switch (113), connected to the first pressure gauge (111), is configured to output a control signal capable of starting the air compressor (21) undergoing a standby mode test when the pressure at the outlet of the drying unit (22) is less than a third set pressure during the standby mode test of one of the air compressors (21), and output a control signal capable of stopping the air compressor (21) undergoing a standby mode test when the pressure at the outlet of the drying unit (22) is greater than a fourth set pressure, wherein the third set pressure is less than the first set pressure, and the fourth set pressure is greater than the third set pressure and less than the second set pressure.

7. The air compressor test system according to any one of claims 1 to 4, characterized in that, The pressure relief unit (13) includes: A regulating valve (131), connected to the pipeline transfer unit (12), for regulating the discharge amount of the compressed air output by the air compressor (21) during the test.

8. The air compressor test system according to claim 7, characterized in that, The pressure relief unit (13) further includes: A sixth valve (134), the first end of the sixth valve (134) being connected to the output port of the regulating valve (131), and the sixth valve (134) being configured to discharge compressed air through its second end when it is opened.

9. An emergency air compressor system for a nuclear power plant, characterized in that, The nuclear power plant emergency air compressor system includes: A plurality of air compressors (21); A drying unit (22) for drying the compressed air output by the air compressors (21); and The air compressor test system according to any one of claims 1 to 8.

10. The emergency air compressor system of a nuclear power plant according to claim 9, characterized in that, The nuclear power plant emergency air compressor system further includes: A plurality of fourth valves (23), corresponding to the plurality of air compressors (21) one by one, each fourth valve (23) being connected in series between the corresponding air compressor (21) and the inlet of the drying unit (22) one by one, each fourth valve (23) being configured to open when the corresponding air compressor (21) is put into operation and close when the corresponding air compressor (21) is taken out of operation; and A fifth valve (24), the first end of the fifth valve (24) being connected to the outlet of the drying unit (22), and the second end of the fifth valve (24) being configured to output instrument air.

Images