Redundant switching method and system for circulating water pump

Abstract

The present application discloses a redundant switching method and system for a circulating water pump. The method comprises: determining an aquatic organism detection area around a circulating water pump; detecting an aquatic organism around the circulating water pump to obtain surrounding aquatic organism information, analyzing the fault risk level of the aquatic organism detection area on the basis of the surrounding aquatic organism information, on the basis of the fault risk level of the aquatic organism detection area, determining whether to perform a test run on a standby pump to obtain test run information, on the basis of the test run information, analyzing whether the standby pump is normal, and if not, repairing the standby pump until the standby pump runs normally; calculating a value of heat required to be taken away by circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS; detecting whether a fault occurs in the circulating water pump, and if yes, outputting water pump fault information; and once the water pump fault information is received, starting the standby pump, and adjusting inlet and outlet valves of the circulating water pump and inlet and outlet valves of the standby pump on the basis of the circulating water heat consumption value ORS. The present application has the effect of improving the reliability of redundant switching of circulating water pumps.

Description

Redundant switching method and system of circulating water pump TECHNICAL FIELD

[0001] The present application relates to the technical field of circulating water pumps, in particular to a redundant switching method and system of a circulating water pump. BACKGROUND

[0002] Currently, circulating water pumps are arranged at heat stations, heat sources or cold sources, etc. In the closed loop of a heating system or an air conditioning water system, the circulating water pump is not used to lift water to a high place, but to make the water circulate in the system, overcome the resistance loss of the loop, and has nothing to do with the height of the building, so it is called a circulating water pump. The circulating water pump of a nuclear power plant is used to cool the coolant from the reactor to the nuclear reactor to control the temperature of the nuclear reaction and carry away heat. When the circulating water pump fails or needs maintenance, the standby pump needs to be switched on so that the nuclear power plant can operate normally, so the redundant switching of the circulating water pump is very important.

[0003] The existing redundant switching system of the circulating water pump detects whether the circulating water pump has failed, and if the circulating water pump has failed, the standby pump is started, and the valve of the circulating water pump is adjusted. However, in the existing redundant switching system of the circulating water pump, the standby pump is started only when the circulating water pump fails, and the standby pump is not tested before starting. If the standby pump has failed when starting, the reactor may be shut down, affecting the normal operation of the nuclear power plant. The reliability of the redundant switching of the circulating water pump is low, and there is room for improvement. SUMMARY

[0004] In order to improve the reliability of the redundant switching of the circulating water pump, the present application provides a redundant switching method and system of a circulating water pump.

[0005] In a first aspect, the present application provides a redundant switching method of a circulating water pump, which adopts the following technical scheme:

[0006] The redundant switching method of the circulating water pump comprises the following steps:

[0007] The water organism detection area around the circulating water pump is determined;

[0008] Based on the water organism detection area, the water organisms around the circulating water pump are detected to obtain surrounding water organism information. Based on the surrounding water organism information, the fault risk degree of the water organism detection area is analyzed. Based on the fault risk degree of the water organism detection area, it is determined whether to test the state of the standby pump to obtain test information. Based on the test information, it is analyzed whether the standby pump is normal. If it is abnormal, the standby pump is repaired until the standby pump operates normally.

[0009] The heat value required to be taken away by the circulating water in the circulating water pump is calculated to obtain a circulating water heat consumption value ORS.

[0010] detecting whether the circulating water pump is in failure, and outputting water pump failure information if the circulating water pump is in failure;

[0011] if the water pump failure information is received, the circulating water pump is maintained and the standby pump is started, and the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump are adjusted based on the circulating water heat consumption value ORS.

[0012] Preferably, the suction force of the circulating water pump at the liquid suction position is detected to obtain water pump suction force information, and the water organism detection area value is analyzed based on the water pump suction force information, the water organism detection area being circularly arranged, wherein the greater the suction force of the circulating water pump in the water pump suction force information, the greater the water organism detection area value;

[0013] The flow of ambient air at the liquid suction position of the circulating water pump is detected to obtain air flow information, wherein the air flow information includes ambient wind force information and ambient wind direction information;

[0014] The shape of the water organism detection area is adjusted based on the ambient wind direction information to obtain water organism detection area shape information, and the adjustment degree of the shape of the water organism detection area is determined based on the ambient wind force information to obtain water organism detection area shape adjustment information, wherein the greater the ambient wind force, the higher the adjustment degree of the shape of the water organism detection area;

[0015] The water organism detection area is obtained based on the water organism detection area value, the water organism detection area shape information, and the water organism detection area shape adjustment information.

[0016] Preferably, based on the water organism detection area, the water organisms around the circulating water pump are detected to obtain surrounding water organism information;

[0017] The activity degree and the volume size of the water organisms surrounding the circulating water pump are analyzed based on the surrounding water organism information to obtain water organism activity degree information and water organism volume size information;

[0018] Based on the water organism activity degree information, the probability of escaping of the water organisms that are mistakenly sucked into the inlet pipe of the circulating water pump and then escape in the water organism detection area is analyzed to obtain a water organism escape coefficient AC;

[0019] The water organism volume size information is compared with preset water organism volume threshold information, and if the water organism volume size is greater than the preset water organism volume threshold information, the difference between the water organism volume size and the water organism volume threshold information is calculated, which is denoted as a water organism volume difference;

[0020] Based on the water organism volume difference, the influence of the water organism volume on the water organisms becoming a failure risk source is analyzed to obtain a water organism volume influence coefficient AE;

[0021] According to the water organism escape coefficient AC and the water organism volume influence coefficient AE, based on the failure water organism probability correlation function The failure risk probability of each water organism in the water organism detection area is calculated, wherein a1 and a2 are proportional factors and are greater than 0; and the failure risk degree of the water organism detection area is calculated by adding the failure risk probability of each water organism in the water organism detection area.

[0022] The failure risk degree of the water organism detection area is compared with the preset water organism failure risk degree threshold value to obtain a water organism failure comparison result.

[0023] Based on the water organism failure comparison result, if the failure risk degree of the water organism detection area is less than the water organism failure risk degree threshold value, the standby pump does not need to be tested, if the failure risk degree of the water organism detection area is greater than or equal to the water organism failure risk degree threshold value, the standby pump is tested to obtain test information, based on the test information, it is judged whether the standby pump is normal, if normal, the standby pump running normally result is output, if abnormal, the standby pump is repaired until the standby pump running normally result is output.

[0024] Preferably, the ambient temperature of the circulating water pump is detected to obtain ambient temperature information BR, and the temperature of the circulating water in the circulating water pump is detected to obtain circulating water temperature information, the ambient temperature information BR and the circulating water temperature information are compared to obtain a circulating water temperature comparison result.

[0025] Based on the circulating water temperature comparison result, an external temperature influence coefficient P is obtained, if the ambient temperature information BR is equal to the circulating water temperature information, the external temperature influence coefficient P is 0, if the ambient temperature information BR is greater than the circulating water temperature information, the external temperature influence coefficient P is greater than 0, if the ambient temperature information BR is less than the circulating water temperature information, the external temperature influence coefficient P is less than 0.

[0026] The building material of the circulating water pipeline of the circulating water pump is detected to obtain pipeline building material information, and based on the pipeline building material information, the temperature conductivity of the circulating water pipeline building material of the circulating water pump is analyzed to obtain a pipeline conductivity coefficient Q.

[0027] Based on the external temperature influence coefficient P and the pipeline conductivity coefficient Q, based on the external temperature correlation function The ambient temperature of the circulating water pump is calculated and analyzed to obtain the temperature influence heat value RY of the circulating water in the circulating water pump, wherein a1 is a proportional factor and is greater than 0; whether the ambient temperature of the circulating water pump appears rainfall is detected, if no rainfall appears, the rainfall influence heat value RT is 0, if rainfall appears, the rainfall amount information Z is obtained, based on the rainfall amount information Z and the pipeline conductivity coefficient Q, based on the rainfall correlation function The temperature heat value RT affected by the rainfall is obtained by calculating and analyzing the rainfall around the circulating water pump and the temperature heat of the circulating water in the circulating water pump. The proportion factor is greater than 0; the heat value RC generated by the nuclear reactor is obtained by calculating the heat generated by the nuclear reactor based on the heat power information of the nuclear reactor;

[0028] The safety heat difference value RE is pre-set based on the nuclear reactor scale information, wherein the larger the nuclear reactor scale information is, the larger the safety heat difference value RE is;

[0029] The temperature influence heat value RY, the rainfall influence heat value RT, the heat value RC, and the safety heat difference value RE are integrated, and the heat consumption value correlation function The heat consumption value ORS of the circulating water in the circulating water pump is obtained by calculating the heat taken away by the circulating water when the circulating water runs.

[0030] Preferably, the temperature of the circulating water pump is detected based on the temperature sensor to obtain the pump temperature information;

[0031] The surrounding temperature information BR of the circulating water pump is detected, the wind information BL around the circulating water pump is detected, and the rainfall information Z is obtained if there is rainfall around the circulating water pump;

[0032] The surrounding temperature information BR, the wind information BL, and the rainfall information Z are integrated, and the temperature influence correlation function The influence of the environment around the circulating water pump on the temperature of the circulating water pump is calculated to obtain the environmental temperature influence coefficient BC;

[0033] The pump heat information is obtained based on the pump temperature information and the environmental temperature influence coefficient BC;

[0034] The pump heat information is compared with the preset pump heat threshold information to determine whether the circulating water pump is overheating abnormally, if the pump heat information is greater than or equal to the pump heat threshold information, it is determined that the circulating water pump is overheating abnormally, and the temperature abnormal information is output;

[0035] The current of the circulating water pump motor is detected to obtain the pump motor current information, and the pump motor current information is compared with the preset pump motor current threshold information, if the pump motor current information is greater than the preset pump motor current threshold information, the first current abnormal information is output;

[0036] analyzing whether a current mutation occurs based on the water pump motor current information, outputting current mutation information if the current mutation occurs, analyzing a current fluctuation amplitude of the motor of the circulating water pump based on the water pump motor current information to obtain current fluctuation amplitude information, comparing the current fluctuation amplitude information with preset current fluctuation amplitude threshold information, outputting current fluctuation abnormality information if the current fluctuation amplitude information is greater than or equal to the preset current fluctuation amplitude threshold information, and outputting second current abnormality information based on the current logic OR gate receiving the current mutation information or the current fluctuation abnormality information;

[0037] determining that the motor current of the circulating water pump is abnormal based on the current abnormality logic OR gate receiving the first current abnormality information or the second current abnormality information, and outputting motor current abnormality information;

[0038] outputting first water pump abnormality information based on the first logic OR gate receiving the temperature abnormality information or the motor current abnormality information.

[0039] Preferably, water pump vibration information is obtained based on a vibration sensor detecting a vibration condition of the circulating water pump, the water pump vibration information is matched with preset water pump vibration standard information, and water pump vibration abnormality information is output if the water pump vibration information is inconsistent with the preset water pump vibration standard information;

[0040] water pump sound information is obtained based on a sound sensor detecting a sound of the circulating water pump, the water pump sound information is matched with preset water pump sound standard information, and water pump sound abnormality information is output if the water pump sound information is inconsistent with the preset water pump sound standard information;

[0041] outputting second water pump abnormality information based on the second logic OR gate receiving the water pump vibration abnormality information or the water pump sound abnormality information;

[0042] determining that the circulating water pump is faulty based on the third logic OR gate receiving the first water pump abnormality information or the second water pump abnormality information, and outputting water pump fault information.

[0043] Preferably, if the water pump fault information is received, a standby pump is started and an import and export valve of the standby pump is opened;

[0044] determining a required flow value and a required water pressure value of the circulating water pump when the circulating water pump is running based on a circulating water heat consumption value OR, wherein the greater the circulating water heat consumption value OR is, the greater the required flow value of the circulating water pump when the circulating water pump is running is, and the greater the circulating water heat consumption value OR is, the greater the required water pressure value of the circulating water pump when the circulating water pump is running is;

[0045] Slowly adjust the inlet and outlet valves of the circulating water pump and slowly increase the inlet and outlet valves of the standby pump, control the sum of the flow of the circulating water pump and the flow of the standby pump to be the required flow value when the circulating water pump is running, and control the comprehensive water pressure of the water pressure of the circulating water pump and the water pressure of the standby pump to be the required water pressure value when the circulating water pump is running.

[0046] In a second aspect, the application provides a redundancy switching system of a circulating water pump, which adopts the following technical solution:

[0047] The redundancy switching system of the circulating water pump comprises:

[0048] A water organism detection area determination module is configured to determine a water organism detection area around the circulating water pump.

[0049] A trial operation judgment module is configured to detect the water organisms around the circulating water pump based on the water organism detection area to obtain surrounding water organism information, analyze the fault risk degree of the water organism detection area based on the surrounding water organism information, judge whether to perform trial operation on the standby pump state based on the trial operation information, analyze whether the standby pump is normal based on the trial operation information, and perform maintenance on the standby pump until the standby pump operates normally if the standby pump is abnormal.

[0050] A heat consumption analysis module is configured to calculate the heat value required to be taken away by the circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS.

[0051] A water pump fault analysis module is configured to detect whether the circulating water pump has a fault, and output water pump fault information if a fault occurs.

[0052] A valve adjustment module is configured to perform maintenance on the circulating water pump and start the standby pump if the water pump fault information is received, and adjust the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump based on the circulating water heat consumption value ORS.

[0053] In summary, the application includes at least one of the following beneficial technical effects:

[0054] The water organism detection area around the circulating water pump is determined, the water organisms around the circulating water pump are detected based on the water organism detection area to obtain surrounding water organism information, the fault risk degree of the water organism detection area is analyzed, it is judged whether to detect the standby pump operation state, if the standby pump operation state is abnormal, the standby pump is overhauled until the operation is normal, the heat value required to be taken away by the circulating water in the circulating water pump is calculated to obtain the circulating water heat consumption value ORS, whether the circulating water pump has a fault is detected, if a fault occurs, the standby pump is started and the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump are adjusted based on the circulating water heat consumption value ORS, the fault risk of the circulating water pump is evaluated by the water organisms around the circulating water pump, and the standby pump operation state is detected, so that when the circulating water pump fails, the standby pump can operate normally, the reliability of the redundant switching of the circulating water pump is improved, the heat value required to be cooled by the circulating water in the circulating water pump is calculated, thereby the inlet and outlet valves of the standby pump are adjusted, thereby the stability of the redundant switching of the circulating water pump is improved, and the reliability of the redundant switching of the circulating water pump is further improved.

[0055] The water organisms around the circulating water pump are detected by the water organism detection area to obtain surrounding water organism information, the water organism activity degree information and the water organism volume size information are analyzed according to the surrounding water organism information, the water organism escape coefficient AC is obtained according to the water organism activity degree information, the probability that the water organisms are sucked into the inlet pipeline of the circulating water pump and then escape, the water organism volume difference is calculated according to the water organism volume size information, the influence of the water organism volume on the water organisms becoming a fault risk source is analyzed according to the water organism volume difference to obtain the water organism volume influence coefficient AE, the fault risk probability of each water organism in the water organism detection area is obtained by comprehensively considering the water organism escape coefficient AC and the water organism volume influence coefficient AE, the fault risk degree of the water organism detection area is obtained based on the fault risk probability of each water organism in the water organism detection area, whether the standby pump needs to be tested is judged according to the fault risk degree of the water organism detection area, if the standby pump needs to be tested, the standby pump is tested and whether the standby pump is normal is judged, if the standby pump is abnormal, the standby pump is overhauled until the standby pump operates normally, the circulating water pump is fault risk evaluated, whether the standby pump needs to be tested is judged according to the fault risk evaluation result of the circulating water pump, the subsequent standby pump can be started and operated normally, and the reliability of the redundant switching of the circulating water pump is further improved.

[0056] The external temperature influence coefficient P is obtained by comparing the ambient temperature information BR with the circulating water temperature information and analyzing the influence of the external temperature on the temperature of the circulating water, the pipe conduction coefficient Q is obtained by analyzing the temperature conduction of the pipe building material information of the circulating water pipe, the temperature influence heat value RY is obtained by comprehensively considering the external temperature influence coefficient P and the pipe conduction coefficient Q, the rainfall around the circulating water pump is detected, the rainfall influence heat value RT is obtained according to the rainfall information Z and the pipe conduction coefficient Q, the heat arrest value RC is obtained by obtaining the heat generated by the reactor, the safety heat difference value RE is obtained, the heat consumption value ORS of the circulating water in the circulating water pump is obtained by comprehensively considering the temperature influence heat value RY, the rainfall influence heat value RT, the heat arrest value RC and the safety heat difference value RE, and the heat required to be taken away by the circulating water when the circulating water pump is running is obtained, the heat required to be cooled when the circulating water pump is running is calculated, data support is provided for subsequent redundant switching of the circulating water pump, and the reliability of the redundant switching of the circulating water pump is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0057] Fig. 1 is a flowchart of the main embodiment of the circulating water pump redundant switching method;

[0058] Fig. 2 is a module diagram of the main embodiment of the circulating water pump redundant switching system.

[0059] Reference signs: 1, water organism detection area determination module; 2, trial operation judgment module; 3, heat consumption analysis module; 4, water pump fault analysis module; 5, valve adjustment module. DETAILED DESCRIPTION

[0060] The application will be further described in detail below with reference to the accompanying drawings.

[0061] The application discloses a circulating water pump redundant switching method.

[0062] The circulating water pump redundant switching method comprises the following technical solutions:

[0063] Referring to Fig. 1, step S1, the water organism detection area around the circulating water pump is determined. Step S1 specifically comprises the following sub-steps:

[0064] Step S11, the suction force of the liquid suction part of the circulating water pump is detected to obtain water pump suction force information, and the water organism detection area value is analyzed based on the water pump suction force information. The water organism detection area is circularly arranged, wherein the greater the suction force of the circulating water pump in the water pump suction force information, the greater the water organism detection area value.

[0065] Step S12, the flow of the ambient air at the liquid suction part of the circulating water pump is detected to obtain air flow information, wherein the air flow information comprises environmental wind force information and environmental wind direction information.

[0066] Step S13, based on the environmental wind direction information, the water organism detection area shape is adjusted to obtain water organism detection area shape information, and based on the environmental wind force information, the adjustment degree of the water organism detection area shape is determined to obtain water organism detection area shape adjustment information, wherein the greater the environmental wind force, the higher the adjustment degree of the water organism detection area shape.

[0067] Step S14, based on the water organism detection area area value, the water organism detection area shape information and the water organism detection area shape adjustment information, the water organism detection area is obtained.

[0068] In specific application, nuclear power plants often encounter a large number of water organisms invading, triggering the reactor to automatically shut down, resulting in the nuclear power plant unable to operate normally. In the embodiment of the application, the suction size of the circulating water pump suction position is used to determine the water organism detection area area value, the environmental wind direction information of the circulating water pump liquid suction position is used to adjust the water organism detection area shape, the environmental wind force information of the circulating water pump liquid suction position is used to determine the adjustment degree of the water organism detection area shape, and the water organism detection area is determined according to the water organism detection area area value, the water organism detection area shape information and the water organism detection area shape adjustment information, thereby improving the accuracy of the water organism detection area and the reliability of the redundant switching of the circulating water pump.

[0069] Referring to FIG. 1, step S2, based on the water organism detection area, the water organisms around the circulating water pump are detected to obtain surrounding water organism information, based on the surrounding water organism information, the fault risk degree of the water organism detection area is analyzed, based on the fault risk degree of the water organism detection area, it is judged whether to run the standby pump state to obtain running information, based on the running information, it is analyzed whether the standby pump is normal, if not, the standby pump is repaired until the standby pump operates normally. Step S2 specifically includes the following sub-steps:

[0070] Step S21, based on the water organism detection area, the water organisms around the circulating water pump are detected to obtain surrounding water organism information.

[0071] Step S22, based on the surrounding water organism information, the activity degree and the volume size of the water organisms around the circulating water pump are analyzed to obtain water organism activity degree information and water organism volume size information.

[0072] Step S23, based on the water organism activity degree information, the probability of escaping after being sucked into the inlet pipe of the circulating water pump in the water organism detection area is analyzed to obtain a water organism escape coefficient AC.

[0073] Step S24, the water organism volume size information is compared with the preset water organism volume threshold information, if the water organism volume size is greater than the preset water organism volume threshold information, the difference between the water organism volume size and the water organism volume threshold information is calculated, which is recorded as the water organism volume difference.

[0074] Step S25, based on the water organism volume difference, analyze the influence of water organism volume on the water organism becoming a failure risk source to obtain the water organism volume influence coefficient AE.

[0075] Step S26, according to the water organism escape coefficient AC and the water organism volume influence coefficient AE, based on the failure water organism probability correlation function , calculate to obtain the failure risk probability of each water organism in the water organism detection area, wherein a1 and a2 are proportional factors and are both greater than 0.

[0076] Step S27, add the failure risk probability of each water organism in the water organism detection area to obtain the failure risk degree of the water organism detection area.

[0077] Step S28, compare the failure risk degree of the water organism detection area with the preset water organism failure risk degree threshold to obtain the water organism failure comparison result.

[0078] Step S29, based on the water organism failure comparison result, if the failure risk degree of the water organism detection area is less than the water organism failure risk degree threshold, no need to run the standby pump, if the failure risk degree of the water organism detection area is greater than or equal to the water organism failure risk degree threshold, run the standby pump to obtain the running information, judge whether the standby pump is normal based on the running information, if normal, output the standby pump running normal result, if abnormal, repair the standby pump until the standby pump runs normally and output the standby pump running normal result.

[0079] In specific application, according to the water organism detection area, the water organisms around the circulating water pump are detected to obtain the surrounding water organism information, according to the surrounding water organism information, the water organism activity degree information and the water organism volume size information are analyzed, according to the water organism activity degree information, the water organism escape coefficient AC is obtained by analyzing the probability of the water organisms escaping after being accidentally sucked into the inlet pipe of the circulating water pump, according to the water organism volume size information, the water organism volume difference is calculated, according to the water organism volume difference, the water organism volume influence coefficient AE is obtained by analyzing the influence of the water organism volume on the water organisms becoming a failure risk source, the failure risk probability of each water organism in the water organism detection area is obtained by comprehensively considering the water organism escape coefficient AC and the water organism volume influence coefficient AE, the failure risk degree of the water organism detection area is obtained based on the failure risk probability of each water organism in the water organism detection area, whether the standby pump needs to be run is judged according to the failure risk degree of the water organism detection area, if yes, run the standby pump and judge whether the standby pump is normal, if abnormal, repair the standby pump until the standby pump runs normally, evaluate the failure risk of the circulating water pump, and then judge whether the standby pump needs to be run according to the failure risk evaluation result of the circulating water pump, so that the subsequent standby pump can be normally started and run, and the reliability of the circulating water pump redundant switching is improved.

[0080] Referring to FIG. 1, in step S3, the heat consumption value ORS of the circulating water in the circulating water pump is calculated by calculating the heat value taken away by the circulating water in the circulating water pump. Step S3 specifically includes the following sub-steps:

[0081] In step S31, the ambient temperature of the circulating water pump is detected to obtain the ambient temperature information BR, and the temperature of the circulating water in the circulating water pump is detected to obtain the circulating water temperature information. The ambient temperature information BR is compared with the circulating water temperature information to obtain the circulating water temperature comparison result.

[0082] In step S32, the external temperature influence coefficient P is obtained based on the circulating water temperature comparison result. If the ambient temperature information BR is equal to the circulating water temperature information, the external temperature influence coefficient P is 0. If the ambient temperature information BR is greater than the circulating water temperature information, the external temperature influence coefficient P is greater than 0. If the ambient temperature information BR is less than the circulating water temperature information, the external temperature influence coefficient P is less than 0.

[0083] In step S33, the building material of the circulating water pipeline of the circulating water pump is detected to obtain the pipeline building material information, and the temperature conductivity of the building material of the circulating water pipeline of the circulating water pump is analyzed based on the pipeline building material information to obtain the pipeline conductivity coefficient Q.

[0084] In step S34, based on the external temperature influence coefficient P and the pipeline conductivity coefficient Q, the heat influence of the ambient temperature of the circulating water pump on the temperature of the circulating water in the circulating water pump is analyzed based on the external temperature correlation function to obtain the temperature influence heat value RY, wherein is a proportional factor and is greater than 0. In step S35, whether the surrounding environment of the circulating water pump appears rainfall is detected. If no rainfall appears, the rainfall influence heat value RT is 0. If rainfall appears, the rainfall information Z is obtained, and the heat influence of the rainfall on the temperature of the circulating water in the circulating water pump is analyzed based on the rainfall information Z and the pipeline conductivity coefficient Q based on the rainfall correlation function to obtain the rainfall influence heat value RT, wherein is a proportional factor and is greater than 0. In step S36, the thermal power information of the nuclear reactor is obtained, and the heat generated by the nuclear reactor is calculated based on the thermal power information of the nuclear reactor to obtain the heat capture value RC.

[0085] In step S37, the nuclear reactor scale information is obtained, and the safety heat difference value RE is pre-set based on the nuclear reactor scale information. The larger the nuclear reactor scale information is, the larger the safety heat difference value RE is.

[0086] In step S38, the temperature influence heat value RY, the rainfall influence heat value RT, the heat capture value RC, and the safety heat difference value RE are comprehensively considered, and the heat consumption value correlation function The heat taken away by the circulating water when the circulating water pump runs is calculated to obtain the circulating water heat consumption value ORS. In specific application, the ambient temperature influence coefficient P is obtained by comparing the ambient temperature information BR with the circulating water temperature information and analyzing the influence of the ambient temperature on the temperature of the circulating water, the pipe conduction coefficient Q is obtained by analyzing the temperature conduction of the pipe building material information of the circulating water pipe, the temperature influence heat value RY is obtained by comprehensively considering the ambient temperature influence coefficient P and the pipe conduction coefficient Q, the rainfall around the circulating water pump is detected, the rainfall influence heat value RT is obtained according to the rainfall information Z and the pipe conduction coefficient Q, the heat generation value RC of the reactor is obtained, the safety heat difference value RE is obtained, and the heat taken away by the circulating water when the circulating water pump runs is calculated to obtain the circulating water heat consumption value ORS. The heat required to cool the circulating water pump is calculated, which provides data support for subsequent redundancy switching of the circulating water pump and improves the reliability of the redundancy switching of the circulating water pump.

[0087] Referring to FIG. 1, in step S4, it is detected whether the circulating water pump fails, and if so, pump failure information is output. Step S4 specifically includes the following sub-steps:

[0088] In step SA1, the temperature of the circulating water pump is detected based on a temperature sensor to obtain pump temperature information.

[0089] In step SA2, ambient temperature information BR of the circulating water pump is detected, wind force information BL of the circulating water pump is detected, and if there is rainfall around the circulating water pump, rainfall information Z is obtained.

[0090] In step SA3, the ambient temperature information BR, the wind force information BL and the rainfall information Z are comprehensively considered, and the temperature influence correlation function The influence of the ambient environment of the circulating water pump on the temperature of the circulating water pump is calculated to obtain an ambient temperature influence coefficient BC.

[0091] In step SA4, the pump temperature information and the ambient temperature influence coefficient BC are analyzed to obtain pump heating information.

[0092] In step SA5, the pump heating information is compared with preset pump heating threshold information, and it is determined whether the circulating water pump heats abnormally. If the pump heating information is greater than or equal to the pump heating threshold information, it is determined that the circulating water pump heats abnormally, and temperature abnormality information is output.

[0093] Step SA6, detecting the current of the circulating water pump motor to obtain water pump motor current information, comparing the water pump motor current information with preset water pump motor current threshold information, and outputting first current abnormal information if the water pump motor current information is greater than the preset water pump motor current threshold information.

[0094] Step SA7, analyzing whether a current mutation occurs based on the water pump motor current information, outputting current mutation information if the current mutation occurs, analyzing the fluctuation amplitude of the motor current of the circulating water pump based on the water pump motor current information to obtain current fluctuation amplitude information, comparing the current fluctuation amplitude information with preset current fluctuation amplitude threshold information, outputting current fluctuation abnormal information if the current fluctuation amplitude information is greater than or equal to the preset current fluctuation amplitude threshold information, and outputting second current abnormal information based on the current logic OR gate receiving the current mutation information or the current fluctuation abnormal information.

[0095] Step SA8, determining that the motor current of the circulating water pump is abnormal based on the current abnormality logic OR gate receiving the first current abnormal information or the second current abnormal information, and outputting motor current abnormal information.

[0096] Step SA9, outputting first water pump abnormal information based on the first logic OR gate receiving the temperature abnormal information or the motor current abnormal information.

[0097] In specific applications, water pump temperature information is obtained by detecting the temperature of the water pump of the circulating water pump, wind force information BL around the circulating water pump is detected, environmental temperature influence coefficient BC is obtained by comprehensively considering the ambient temperature information BR, the wind force information BL, and the rainfall information Z, whether the heat generation of the circulating water pump is abnormal is analyzed based on the water pump temperature information and the environmental temperature influence coefficient BC, the temperature abnormal information is output if the heat generation is abnormal, whether the current is abnormal is preliminarily judged by comparing the water pump motor current information obtained by detecting the current of the circulating water pump motor with preset water pump motor current threshold information, the first current abnormal information is output if the water pump motor current information is greater than the preset water pump motor current threshold information, whether a current mutation occurs is analyzed according to the water pump motor current information, the current mutation information is output if the current mutation occurs, whether the fluctuation amplitude of the motor current of the circulating water pump is abnormal is analyzed according to the water pump motor current information, the current fluctuation abnormal information is output if the fluctuation amplitude is abnormal, the second current abnormal information is output when the current mutation information or the current fluctuation abnormal information is output, the motor current abnormal information is output when the first current abnormal information or the second current abnormal information is output, the first water pump abnormal information is output based on the first logic OR gate receiving the temperature abnormal information or the motor current abnormal information, whether the circulating water pump is faulty is preliminarily judged through the temperature and current conditions of the circulating water pump, the accuracy of the fault detection of the circulating water pump is improved, and thus the reliability of the redundant switching of the circulating water pump is improved.

[0098] Step S4 further comprises the following sub-steps:

[0099] Step SB1, based on the vibration sensor detecting the vibration condition of the circulating water pump, the pump vibration information is obtained, the pump vibration information is matched with the preset pump vibration standard information, if the pump vibration information is inconsistent with the preset pump vibration standard information, the pump vibration abnormal information is output.

[0100] Step SB2, based on the sound sensor detecting the sound of the circulating water pump, the pump sound information is obtained, the pump sound information is matched with the preset pump sound standard information, if the pump sound information is inconsistent with the preset pump sound standard information, the pump sound abnormal information is output.

[0101] Step SB3, based on the second logic or gate receiving the pump vibration abnormal information or the pump sound abnormal information, the second pump abnormal information is output.

[0102] Step SB4, based on the third logic or gate receiving the first pump abnormal information or the second pump abnormal information, it is determined that the circulating water pump has a fault, and the pump fault information is output.

[0103] In specific application, the vibration condition of the circulating water pump is detected to obtain the pump vibration information, whether the circulating water pump vibration is abnormal is judged based on the pump vibration information, if abnormal, the pump vibration abnormal information is output, the sound of the circulating water pump is detected to obtain the pump sound information, whether the circulating water pump sound is abnormal is judged based on the pump sound information, if abnormal, the pump sound abnormal information is output, based on the second logic or gate receiving the pump vibration abnormal information or the pump sound abnormal information, the second pump abnormal information is output, based on the third logic or gate receiving the first pump abnormal information or the second pump abnormal information, it is determined that the circulating water pump has a fault, and the pump fault information is output, whether the circulating water pump has a fault is further judged through the vibration condition and the sound condition of the circulating water pump, the accuracy of the fault detection of the circulating water pump is improved, thereby the reliability of the redundant switching of the circulating water pump is improved.

[0104] Referring to FIG. 1, step S5, if the pump fault information is received, the circulating water pump is repaired and the standby pump is started, and based on the circulating water heat consumption value ORS, the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump are adjusted. Step S5 specifically comprises the following sub-steps:

[0105] Step S51, if the pump fault information is received, the standby pump is started and the inlet and outlet valves of the standby pump are opened.

[0106] Step S52, based on the circulating water heat consumption value ORS, the required flow value of the circulating water pump when running and the required water pressure value of the circulating water pump when running are determined, wherein the greater the circulating water heat consumption value ORS, the greater the required flow value of the circulating water pump when running, and the greater the circulating water heat consumption value ORS, the greater the required water pressure value of the circulating water pump when running.

[0107] Step S53, slowly reduce the inlet and outlet valves of the circulating water pump and slowly increase the inlet and outlet valves of the standby pump, control the sum of the flow of the circulating water pump and the flow of the standby pump to be the required flow value of the circulating water pump when running, and control the comprehensive water pressure of the water pressure of the circulating water pump and the water pressure of the standby pump to be the required water pressure value of the circulating water pump when running.

[0108] In specific application, by receiving the water pump fault information, starting the standby pump and opening the inlet and outlet valves of the standby pump, determining the required flow value of the circulating water pump when running and the required water pressure value of the circulating water pump when running according to the circulating water heat consumption value ORS, slowly reducing the inlet and outlet valves of the circulating water pump and slowly increasing the inlet and outlet valves of the standby pump, controlling the sum of the flow of the circulating water pump and the flow of the standby pump to be the required flow value of the circulating water pump when running, and controlling the comprehensive water pressure of the water pressure of the circulating water pump and the water pressure of the standby pump to be the required water pressure value of the circulating water pump when running, the smooth transition of the circulating water pump during switching is improved, and the reliability of the redundant switching of the circulating water pump is improved.

[0109] The embodiment of the application also discloses a redundant switching system of a circulating water pump.

[0110] Referring to FIG. 2, the redundant switching system of the circulating water pump comprises a water organism detection area determination module, a trial operation judgment module, a heat consumption analysis module, a water pump fault analysis module and a valve adjustment module.

[0111] The water organism detection area determination module is configured to determine a water organism detection area around the circulating water pump.

[0112] The trial operation judgment module is configured to detect the water organisms around the circulating water pump based on the water organism detection area to obtain surrounding water organism information, analyze the fault risk degree of the water organism detection area based on the surrounding water organism information, judge whether to perform trial operation on the standby pump state based on the fault risk degree of the water organism detection area to obtain trial operation information, analyze whether the standby pump is normal based on the trial operation information, and perform maintenance on the standby pump until the standby pump is normal if the standby pump is abnormal.

[0113] The heat consumption analysis module is configured to calculate the heat value required to be taken away by the circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS.

[0114] The water pump fault analysis module is configured to detect whether the circulating water pump has a fault, and output water pump fault information if the circulating water pump has a fault.

[0115] The valve adjusting module is configured to maintain and start the standby pump if receiving the water pump fault information, and adjust the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump based on the circulating water heat consumption value ORS.

[0116] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A redundancy switching method for a circulating water pump, characterized by, The method comprises the following steps: determining a water organism detection area around the circulating water pump; based on the water organism detection area, detecting water organisms around the circulating water pump to obtain surrounding water organism information, analyzing the fault risk degree of the water organism detection area based on the surrounding water organism information, determining whether to perform a trial run on the standby pump state based on the fault risk degree of the water organism detection area to obtain trial run information, analyzing whether the standby pump is normal based on the trial run information, and if not, performing maintenance on the standby pump until the standby pump operates normally; calculating the heat value required to be taken away by the circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS; detecting whether the circulating water pump has a fault, and if so, outputting water pump fault information; if the water pump fault information is received, performing maintenance on the circulating water pump and starting the standby pump, and adjusting the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump based on the circulating water heat consumption value ORS.

2. The redundancy switching method of a circulating water pump according to claim 1, characterized by, The step of determining the water organism detection area around the circulating water pump specifically comprises: detecting the suction force of the liquid suction position of the circulating water pump to obtain water pump suction force information, analyzing the water organism detection area value based on the water pump suction force information, and the water organism detection area being circularly arranged, wherein the greater the suction force of the circulating water pump in the water pump suction force information, the greater the water organism detection area value; detecting the flow of ambient air at the liquid suction position of the circulating water pump to obtain air flow information, wherein the air flow information comprises ambient wind force information and ambient wind direction information; adjusting the shape of the water organism detection area based on the ambient wind direction information to obtain water organism detection area shape information, and determining the adjustment degree of the shape of the water organism detection area based on the ambient wind force information to obtain water organism detection area shape adjustment information, wherein the greater the ambient wind force, the higher the adjustment degree of the shape of the water organism detection area; obtaining the water organism detection area based on the water organism detection area value, the water organism detection area shape information, and the water organism detection area shape adjustment information.

3. The redundant switching method of a circulating water pump according to claim 2, characterized by, The step of detecting water organisms around the circulating water pump based on the water organism detection area to obtain surrounding water organism information, analyzing the fault risk degree of the water organism detection area based on the surrounding water organism information, determining whether to perform a trial run on the standby pump state based on the fault risk degree of the water organism detection area to obtain trial run information, and analyzing whether the standby pump is normal based on the trial run information, and if not, performing maintenance on the standby pump until the standby pump operates normally, specifically comprises: detecting water organisms around the circulating water pump based on the water organism detection area to obtain surrounding water organism information; analyzing the activity degree and volume size of the water organisms around the circulating water pump based on the surrounding water organism information to obtain water organism activity degree information and water organism volume size information; based on the water organism activity degree information, analyzing the probability of escaping after being accidentally sucked into the inlet pipe of the circulating water pump in the water organism detection area to obtain a water organism escape coefficient AC; comparing the water organism volume size information with preset water organism volume threshold information, if the water organism volume size is greater than the preset water organism volume threshold information, calculating the difference between the water organism volume size and the water organism volume threshold information, denoted as a water organism volume difference; Based on the water organism volume difference, the influence of the water organism volume on the water organism becoming a fault risk source is analyzed to obtain a water organism volume influence coefficient AE; According to the water organism escape coefficient AC and the water organism volume influence coefficient AE, based on the failure water organism probability correlation function The fault risk probability of each water organism in the water organism detection area is calculated, wherein a1 and a2 are proportional factors and are greater than 0; and the fault risk probability of each water organism in the water organism detection area is added to obtain the fault risk degree of the water organism detection area; The fault risk degree of the water organism detection area is compared with a preset water organism fault risk degree threshold to obtain a water organism fault comparison result; Based on the water organism fault comparison result, if the fault risk degree of the water organism detection area is less than the water organism fault risk degree threshold, the standby pump does not need to be tested; if the fault risk degree of the water organism detection area is greater than or equal to the water organism fault risk degree threshold, the standby pump is tested to obtain test information, based on which it is determined whether the standby pump is normal; if the standby pump is normal, a standby pump normal operation result is output; if the standby pump is abnormal, the standby pump is repaired until the standby pump is normal and the standby pump normal operation result is output.

4. The redundant switching method of a circulating water pump according to claim 3, characterized by, The steps of calculating the heat value required to be taken away by the circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS specifically include: Detecting the ambient temperature of the circulating water pump to obtain ambient temperature information BR, detecting the temperature of the circulating water in the circulating water pump to obtain circulating water temperature information, comparing the ambient temperature information BR with the circulating water temperature information to obtain a circulating water internal and external temperature comparison result; Based on the circulating water internal and external temperature comparison result, an external temperature influence coefficient P is obtained; if the ambient temperature information BR is equal to the circulating water temperature information, the external temperature influence coefficient P is 0; if the ambient temperature information BR is greater than the circulating water temperature information, the external temperature influence coefficient P is greater than 0; and if the ambient temperature information BR is less than the circulating water temperature information, the external temperature influence coefficient P is less than 0; Detecting the building material of the circulating water pipeline of the circulating water pump to obtain pipeline building material information, and based on the pipeline building material information, the temperature conductivity of the circulating water pipeline building material of the circulating water pump is analyzed to obtain a pipeline conductivity coefficient Q; Based on the external temperature influence coefficient P and the pipe conduction coefficient Q, the external temperature correlation function computing the temperature influence heat value RY, wherein is a proportionality factor and is greater than 0; detecting whether rainfall occurs in the surroundings of the circulating water pump, if no rainfall occurs, the rainfall influence heat value RT is 0, if rainfall occurs, rainfall information Z is obtained, based on the rainfall information Z, based on the rainfall information Z and the pipe conduction coefficient Q, based on the rainfall correlation function The rainfall influence heat value RT is obtained by calculating and analyzing the influence of the rainfall around the circulating water pump on the temperature and heat of the circulating water in the circulating water pump, wherein a1 and a2 are proportional factors and are greater than 0; obtaining thermal power information of the nuclear reactor, and based on the thermal power information of the nuclear reactor, the heat generated by the reactor is calculated to obtain a heat consumption value RC; Obtaining nuclear reactor scale information, and based on the nuclear reactor scale information, the safety heat difference RE is pre-set; the larger the nuclear reactor scale information is, the larger the safety heat difference RE is; The heat value RY affected by the temperature, the heat value RT affected by the rainfall, the heat value RC, and the safety heat difference value RE are comprehensively considered, and the heat consumption value correlation function is established The heat required to be taken away when the circulating water in the circulating water pump runs is calculated to obtain a circulating water heat consumption value ORS.

5. The redundant switching method of a circulating water pump according to claim 4, characterized by, The steps of detecting whether the circulating water pump is faulty, and outputting water pump fault information if the circulating water pump is faulty, specifically include: Based on the temperature sensor, the temperature of the circulating water pump is detected to obtain water pump temperature information; Detecting the ambient air temperature of the circulating water pump to obtain ambient temperature information BR, detecting the wind information BL around the circulating water pump, and if there is rainfall around the circulating water pump, rainfall information Z is obtained; combining the temperature information BR, the wind information BL and the rainfall information Z, based on a temperature influence correlation function The influence of the ambient environment of the circulating water pump on the temperature of the circulating water pump is calculated to obtain an ambient temperature influence coefficient BC; Based on the water pump temperature information and the environmental temperature influence coefficient BC, water pump heating information is obtained; The water pump heating information is compared with the preset water pump heating threshold information to determine whether the circulating water pump heating is abnormal. If the water pump heating information is greater than or equal to the water pump heating threshold information, it is determined that the circulating water pump heating is abnormal, and temperature abnormal information is output; The current of the circulating water pump motor is detected to obtain water pump motor current information. The water pump motor current information is compared with the preset water pump motor current threshold information. If the water pump motor current information is greater than the preset water pump motor current threshold information, first current abnormal information is output; Based on the water pump motor current information, it is analyzed whether a current mutation occurs. If a current mutation occurs, current mutation information is output. Based on the water pump motor current information, the fluctuation amplitude of the motor current of the circulating water pump is obtained to obtain current fluctuation amplitude information. The current fluctuation amplitude information is compared with the preset current fluctuation amplitude threshold information. If the current fluctuation amplitude information is greater than or equal to the preset current fluctuation amplitude threshold information, current fluctuation abnormal information is output. Based on the current logic OR gate, the current mutation information or the current fluctuation abnormal information is received to output second current abnormal information; Based on the current abnormality logic OR gate, the first current abnormal information or the second current abnormal information is received to determine that the motor current of the circulating water pump is abnormal, and motor current abnormal information is output; Based on the first logic OR gate, the temperature abnormal information or the motor current abnormal information is received to output first water pump abnormal information.

6. The redundant switching method of a circulating water pump according to claim 5, characterized by, The step of detecting whether the circulating water pump has a fault and outputting water pump fault information if a fault occurs also includes: Based on the vibration sensor, the vibration of the circulating water pump is detected to obtain water pump vibration information. The water pump vibration information is matched with the preset water pump vibration standard information. If the water pump vibration information is inconsistent with the preset water pump vibration standard information, water pump vibration abnormal information is output; Based on the sound sensor, the sound of the circulating water pump is detected to obtain water pump sound information. The water pump sound information is matched with the preset water pump sound standard information. If the water pump sound information is inconsistent with the preset water pump sound standard information, water pump sound abnormal information is output; Based on the second logic OR gate, the water pump vibration abnormal information or the water pump sound abnormal information is received to output second water pump abnormal information; Based on the third logic OR gate, the first water pump abnormal information or the second water pump abnormal information is received to determine that the circulating water pump has a fault, and water pump fault information is output.

7. The redundant switching method of a circulating water pump according to claim 6, characterized by, If the water pump fault information is received, the circulating water pump is repaired and the standby pump is started. Based on the circulating water heat consumption value ORS, the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump are adjusted. Specifically, it includes: If the water pump fault information is received, the standby pump is started and the inlet and outlet valves of the standby pump are opened; Based on the circulating water heat consumption value ORS, the required flow value when the circulating water pump is running and the required water pressure value when the circulating water pump is running are determined. The greater the circulating water heat consumption value ORS, the greater the required flow value when the circulating water pump is running. The greater the circulating water heat consumption value ORS, the greater the required water pressure value when the circulating water pump is running. Slowly reduce the inlet and outlet valves of the circulating water pump and slowly increase the inlet and outlet valves of the standby pump, control the sum of the flow of the circulating water pump and the flow of the standby pump to be the required flow value when the circulating water pump is running, and control the comprehensive water pressure of the water pressure of the circulating water pump and the water pressure of the standby pump to be the required water pressure value when the circulating water pump is running.

8. Redundant switching system for circulating water pumps, characterized in that, The redundancy switching system of the circulating water pump is used to realize the redundancy switching method of the circulating water pump as claimed in any one of claims 1-7, comprising: a water organism detection area determination module configured to determine a water organism detection area around the circulating water pump; a trial operation judgment module configured to detect surrounding water organisms based on the water organism detection area to obtain surrounding water organism information, analyze the failure risk degree of the water organism detection area based on the surrounding water organism information, judge whether to perform trial operation on the standby pump state based on the failure risk degree of the water organism detection area to obtain trial operation information, analyze whether the standby pump is normal based on the trial operation information, and perform maintenance on the standby pump until the standby pump is normal if it is abnormal; a heat consumption analysis module configured to calculate the heat value required to be taken away by the circulating water in the circulating water pump to obtain a circulating water heat consumption value ORS; a water pump failure analysis module configured to detect whether the circulating water pump has failed, and output water pump failure information if a failure occurs; a valve adjustment module configured to perform maintenance on the circulating water pump and start the standby pump if the water pump failure information is received, and adjust the inlet and outlet valves of the circulating water pump and the inlet and outlet valves of the standby pump based on the circulating water heat consumption value ORS.

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