CN115058574A - Intelligent control system for preventing TUBEDING of nuclear power steam generator - Google Patents
Intelligent control system for preventing TUBEDING of nuclear power steam generator Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention provides an intelligent control system for preventing TUBED of a nuclear power steam generator, which uses a computer as an upper computer to be electrically connected with a plurality of temperature sensors, a plurality of angular displacement sensors and a plurality of fan sets, wherein during circular seam heat treatment, a first cold air unit is connected with an air inlet channel at the central position of a bottom sealing plate, a second cold air unit is connected with a jacket between a shell and an inner sleeve, a hot air unit is connected with a hand hole which is close to the ground and can be communicated with the inner sleeve, under the control of the computer, two cold air units send cold air to different areas inside the steam generator according to real-time monitored temperature and angular displacement measurement data, and the hot air unit sends hot air to the lower area inside, the data information collected by the system is timely and complete, the feedback speed is high, the automatic control of each fan set is realized, and the control precision and speed of the temperature inside the steam generator are improved, the working strength of personnel is reduced, and the generation of dents is effectively prevented.
Description
Technical Field
The specification relates to the technical field of steam generator manufacturing, in particular to an intelligent control system for preventing TUBED of a nuclear power steam generator.
Background
The nuclear power steam generator is large in size and complex in structure, a large number of U-shaped tubes and supporting plates are arranged in the nuclear power steam generator, when a circular seam heat treatment process between a lower seal head and a tube plate is carried out, the supporting plates deform due to uneven thermal expansion of all parts, if the deformation is not controlled, the supporting plates can cause permanent dents (TUBED) on the U-shaped tubes, and the product quality of the steam generator is damaged.
The working time of the circular seam heat treatment process is long, the interior of the steam generator is in a closed state, the sight line cannot be reached, and operators cannot directly observe the deformation of the support plate, so that the dent prevention is very challenging. At present, a large number of heat sensors and angular displacement sensors are arranged to collect data, and the operating parameters of a cold air unit and a hot air unit are manually controlled by means of manual continuous tracking, so that the internal temperature field of a steam generator is controlled to prevent dents. However, the local heat treatment process is as long as 36 to 72 hours, three sets of independent devices are used in the heat treatment process, and are respectively used for monitoring the internal environment temperature of the steam generator, the angular displacement deformation of the support plate and the control of the fan unit, so that the centralized control is difficult to realize, a large number of field personnel need to be arranged in the actual production, and manual operation is relied on, for example: the manual copying and analysis of the measured data and the manual control of the fan operation parameters have the advantages that the operation time of the circular seam heat treatment process is long, the working intensity is high, the number of participators is large, the number of equipment data is large, field personnel frequently go back and forth between the detection devices and the control device to carry out data acquisition and temperature field control, the labor intensity is high, the manual errors can occur in the handwriting recording and manual control modes, the timeliness of temperature control cannot be guaranteed, and the dent prevention effect cannot be guaranteed.
Disclosure of Invention
In view of this, the embodiment of the present specification provides an intelligent control system for preventing the tube of the nuclear power steam generator, and the system can automatically control the cold air blower unit and the hot air blower unit, so that the regulation and control are accurate, the labor intensity is reduced, and human errors are avoided.
The embodiment of the specification provides the following technical scheme:
a smart control system for preventing TUBEDING in a nuclear power steam generator, the nuclear power steam generator including a shell and an inner sleeve disposed inside the shell with a jacket therebetween, the smart control system comprising:
the bottom sealing plate is arranged at the large-end opening of the shell, an air inlet channel is arranged at the center of the bottom sealing plate, and an exhaust channel is arranged at the edge of the bottom sealing plate;
the flow rate of the first cold air unit is controllable, the first cold air unit is connected with the jacket, and the second cold air unit is connected with the air inlet channel;
the hot air unit is connected with a first hand hole, when the circular seam heat treatment is carried out, the nuclear power steam generator is horizontally placed along the axis direction, and the first hand hole is a hand hole which is close to the ground and is communicated with the inner sleeve;
the temperature sensors are used for measuring the temperatures of different areas of the nuclear power steam generator;
a plurality of angular displacement sensors for measuring displacement of a support plate, the support plate being mounted in the inner sleeve;
the calculation host is electrically connected with the temperature sensors, the angular displacement sensors, the cold air units and the hot air units and used for outputting a first cold air control signal, a second cold air control signal and a hot air control signal according to the measured temperature and angular displacement in the cooling stage of the circular seam heat treatment;
the first cold air control signal is used for controlling the flow of the first cold air unit, the second cold air control signal is used for controlling the flow of the second cold air unit, and the hot air control signal is used for controlling the flow and the temperature of the hot air unit.
By arranging the intelligent control system, during the cooling stage of the circular seam heat treatment, cold air is input into the nuclear power steam generator through the jacket by the first cold air unit, cold air is input into the nuclear power steam generator from the air inlet channel at the central position of the bottom seal plate by the second cold air unit, meanwhile, hot air is input into the nuclear power steam generator from the first hand hole close to the ground by the hot air unit, so that heat below the inside of the nuclear power steam generator is supplemented, the control signal of the cold air unit and the control signal of the hot air unit are output in real time by the computer according to the temperature measurement data and the angular displacement measurement data, so that the cooperative operation of the cold air unit and the hot air unit is controlled, the cold and hot air flow in the nuclear power steam generator flows according to the designed direction, and the flow of cold air and the flow and the problems of hot air can be adjusted, the area below the inner part of the nuclear power steam generator is heated, the area above the inner part of the nuclear power steam generator is cooled, the internal upper and lower temperature difference is balanced, the internal temperature of the nuclear power steam generator is uniform and balanced, the local temperature is prevented from sudden change, the internal temperature of the nuclear power steam generator is automatically controlled, and the problem of U-shaped pipe dent caused by deformation of the supporting plate is avoided. The intelligent control system can also be used for automatically controlling the temperature inside the nuclear power steam generator in the heating-up stage and the heat-preservation stage of the circular seam heat treatment by stopping the second cold air unit.
In a preferred embodiment, the air intake passage includes a plurality of second air intake holes, and the number of the second air intake holes located above the horizontal dividing line of the bottom closure plate is 2 times the number of the second air intake holes located below the horizontal dividing line.
In a preferred embodiment, the second air cooling unit further includes a second connecting pipe and a second valve, the number of the second connecting pipe and the number of the second valve are the same as that of the second air inlet, the second valve is disposed at an air outlet end of the second air cooling unit, and the second connecting pipe is correspondingly connected with the second air inlet and the second valve.
In a preferred embodiment, the intelligent control system further comprises a third cold air unit, the third cold air unit is connected with a second hand hole, and the second hand hole is communicated with the inner sleeve and is located on the opposite side of the first hand hole;
the computer host is electrically connected with the third cold air unit to output a third cold air control signal, and the third cold air control signal is used for controlling the flow of the third cold air unit.
In a preferred embodiment, the third cold air unit comprises a forward and reverse rotating fan, and the third cold air control signal is further used for controlling the operation direction of the third cold air unit.
In a preferred embodiment, the third cold air unit is connected to the second hand hole through a three-way valve.
In a preferred embodiment, the intelligent control system further comprises a jacket air inlet plate, and the jacket air inlet plate is mounted at a position, close to the bottom sealing plate, of the jacket;
a plurality of first air inlets are formed in the edge position of the jacket air inlet plate, and the first air inlet is connected with the first air cooling unit.
In a preferred embodiment, the first air inlet holes are uniformly arranged on the jacket air inlet plate along the circumferential direction.
In a preferred embodiment, the first cold air unit further includes first connection pipes and first valves, the number of the first connection pipes is the same as that of the first air inlets, the first valves are disposed at the air outlet ends of the first cold air unit, and the first connection pipes are correspondingly connected with the first air inlets and the first valves.
In a preferred embodiment, the exhaust air channel is provided at an edge of the bottom closure plate on a side thereof adjacent to the ground.
In a preferred embodiment, the intelligent control system further comprises a central control device, wherein the computing host, the display device and the fan control device are installed in the central control device;
the display device is used for displaying any one or combination of temperature measurement data, angular displacement measurement data, operation data of the first cold air unit, operation data of the second cold air unit and operation data of the hot air unit;
the fan control device is used for adjusting at least one operation parameter of the first cold air control signal, the second cold air control signal and the hot air control signal.
In a preferred embodiment, the central control device further includes an authority control device, and the authority control device is electrically connected to the fan control device and is used for providing an operation authority of the fan control device.
Compared with the prior art, the embodiment of the specification adopts at least one technical scheme which can achieve the beneficial effects that at least: through connecting temperature sensor with the computer, the angle displacement sensor, each cold wind unit, hot-blast unit constitutes prevents nuclear power steam generator TUBED's intelligent control system, the computer is according to temperature measurement data and angle displacement measurement data, the control signal of real-time output cold wind unit and the control signal of hot-blast unit, control cold wind unit and hot-blast unit function in coordination, through the cold wind flow of control cold wind unit output and the hot-blast flow and the hot-blast temperature of control hot-blast unit output, cold wind and hot-blast flow along the flow direction of design in nuclear power steam generator is inside, thereby make the inside below region obtain the heating, the inside top region obtains the cooling, balanced inside upper and lower temperature difference, make the inside temperature of nuclear power steam generator even, it is balanced. By using the intelligent control system for preventing the TUBED of the nuclear power steam generator, various monitoring data in the local heat treatment process can be gathered in real time, and the operation parameters of the air cooling unit and the hot air unit can be automatically controlled, so that the control speed is high, the control is accurate, the human error is avoided, and the labor intensity is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of a nuclear steam generator heat treatment;
FIG. 2 is a schematic view showing the relative positions of the support plate and the U-shaped pipe;
FIG. 3 is a schematic view of the connection of a fan unit in a circular seam heat treatment cooling stage;
FIG. 4 is a schematic view of the bottom closure plate;
FIG. 5 is a block diagram of a smart control system for preventing TUBEDING in a nuclear power steam generator;
FIG. 6 is a schematic view of the fan assembly connection during the temperature rise and heat preservation phase of the circular seam heat treatment;
FIG. 7 is a schematic front view of a second air cooler block lifting platform;
FIG. 8 is a schematic side view of a second air cooler block lifting platform;
FIG. 9 is a schematic view of a jacket air inlet plate configuration;
fig. 10 is a block diagram of the structure of an intelligent control system provided with a central control apparatus;
the reference numbers used in the drawings are as follows:
1. the device comprises a shell, 10, a big end, 11, a first hand hole, 12, a second hand hole, 13, a third hand hole, 2, an inner sleeve, 21, a support plate, 22, a U-shaped pipe, 3, a jacket, 4, a bottom seal plate, 41, an air inlet channel, 411, a second air inlet hole, 42, an air outlet channel, 5, a first cold air unit, 6, a second cold air unit, 61, a second valve, 62, a second connecting pipe, 63, an air outlet end, 64, an electric control cabinet, 65, a fan, 7, a third cold air unit, 71, a three-way valve, 8, a hot air unit, 82, a second three-way valve, 9, a jacket air inlet plate, 92, a first air inlet hole, 100, a hoisting platform, 101 and a hoisting point.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
It is to be understood that "the component a is connected to the component B" means that the component a is directly connected to the component B in contact therewith, or the component a is indirectly connected to the component B through other components. The terms of orientation of "upper", "lower", "inner", "outer", "side", and the like described in the exemplary embodiments of the present specification are described with respect to the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present specification.
In addition, in the following description, specific details are provided to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The nuclear power steam generator has a large size and a complex structure, as shown in fig. 1, a large number of U-shaped tubes 22 (the tube wall is about 1mm) for heat exchange and a supporting plate 22 for fixing the U-shaped tubes 21 are arranged in the nuclear power steam generator, when a circular seam heat treatment process between a bottom sealing plate and a tube plate is performed after an upper assembly, the U-shaped tubes 22, the supporting plate 21 and the bottom sealing plate are manufactured, as a left dotted line shown in fig. 1 indicates a position of circular seam heat treatment performed at a position of a welding seam between an upper cylinder and a cone, because the nuclear power steam generator has a large volume, and the U-shaped tubes 22 and the supporting plate 21 are densely distributed (as shown in fig. 2, the U-shaped tubes 22 in the figure are only shown in a structural schematic view), the temperature inside the nuclear power steam generator may be different by more than 100 ℃, and the supporting plate 21 is deformed due to uneven thermal expansion of each component (e.g. the tube plate, the outer cylinder, the inner sleeve and the supporting plate and the connecting rod supporting plate), if this deformation is not controlled, the support plate 21 will cause permanent dents (tubings) on the U-tubes 22, which will impair the quality of the product of the steam generator for nuclear power.
When the circular seam heat treatment process is carried out, the interior of the steam generator is in a closed state, the sight line is not accessible, and an operator cannot directly observe the deformation of the support plate, so that the dent prevention is very challenging. At present, a large number of heat sensors (such as thermocouples) and angular displacement sensors are arranged for acquiring data, and the data of the sensors are continuously tracked manually, so that the operating parameters of a cold air unit and a hot air unit are manually controlled, and the internal temperature field of a steam generator is controlled to prevent the generation of dents. Based on the control requirements, three sets of independent devices are used in the heat treatment process and are respectively used for monitoring the internal environment temperature of the steam generator, monitoring the angular displacement deformation of the support plate and controlling the fan unit, centralized control is difficult to realize in the actual control process, a large number of field personnel need to be arranged in the actual production, and manual operation is relied on, for example: the manual recording and analysis of the measured data and the manual control of the fan operation parameters have long operation time (generally 36 to 72 hours) in the circular seam heat treatment process, field personnel frequently go to and fro between the plurality of detection devices and the control device to carry out data acquisition and temperature field control, so that the labor intensity is high, human errors can occur in the handwriting recording and manual control modes, the timeliness of temperature control cannot be ensured, and the dent prevention effect cannot be guaranteed.
The invention provides an intelligent control system for preventing TUBED of a nuclear power steam generator, which uses a computer as an upper computer to connect a temperature monitoring device, an angular displacement monitoring device and a fan control device, and realizes the centralized control of the monitoring device and the control device, thereby better controlling the internal temperature field of the nuclear power steam generator, summarizing various monitoring data, automatically controlling the operation parameters of a cold air unit and a hot air unit, improving the control accuracy and reducing the labor intensity; and, through special bottom shrouding structural design and the structural design who utilizes steam generator itself, when the circumferential weld heat treatment, nuclear power steam generator is placed by the level, and high-power cold wind unit and hot-blast unit are under the control of computer, send cold wind and hot-blast to steam generator inside and lower part respectively to realize even temperature in nuclear power steam generator inside, solve above-mentioned problem, prevent that bearing plate 21 warp, prevent the indent on the U type pipe 22 from producing.
The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.
The nuclear power steam generator shown in fig. 1 comprises an upper barrel and a lower barrel, wherein one end of the lower barrel is a large end 10, and the other end of the lower barrel is a small end, as shown in fig. 1, the cross section of the large end 10 is trapezoidal, and the diameter of the large end 10 facing the upper barrel is larger than that of the large end far away from the upper barrel.
The lower cylinder of the nuclear power steam generator comprises a shell 1 and an inner sleeve 2 arranged inside the shell 1, and a jacket 3 is arranged between the shell 1 and the inner sleeve 2.
The invention provides an intelligent control system for preventing TUBEDING of a nuclear power steam generator, which comprises: bottom shrouding 4, fan group, calculation host computer, a plurality of temperature sensor and a plurality of angular displacement sensor.
When the circular seam heat treatment is carried out, as shown in fig. 3, the nuclear power steam generator is horizontally placed along the axis direction, and the bottom closing plate 4 is installed at the opening of the large end 10 of the shell 1. As shown in fig. 4, an air inlet passage 41 is provided at the center of the bottom sealing plate 4, and an air outlet passage 42 is provided at the edge of the bottom sealing plate 4. The fan set comprises a first cold air unit 5 and a second cold air unit 6 with controllable flow and a hot air unit 8 with controllable flow and temperature, wherein the first cold air unit 5 is connected with the jacket 3, the second cold air unit 6 is connected with the air inlet channel 41, the hot air unit 8 is connected with a first hand hole 11, as shown in fig. 3, the first hand hole 11 is close to the ground, and the first hand hole 11 is communicated with the inner sleeve 2.
The temperature sensors are arranged in the nuclear power steam generator and used for measuring the temperatures of different areas of the nuclear power steam generator. For example: the thermal temperature sensors are thermocouples, the number of the thermal temperature sensors is 56, the thermal temperature sensors are arranged in different U-shaped pipes 22, and the thermal temperature sensors are used for measuring the temperature of different positions in the nuclear power steam generator.
A number of angular displacement sensors are mounted on the support plate 21 for measuring the displacement of the support plate 21. For example: the angular displacement sensors are installed on the outermost support plate, 4 or 6 in number, and are uniformly distributed in the circumferential direction of the support plate 21 to measure the amount of deformation at each measurement point.
As shown in fig. 5, the computer is electrically connected to each temperature sensor, each angular displacement sensor, the first cold air unit 5, the second cold air unit 6, and the hot air unit 8, and during a cooling stage of the circular seam heat treatment, the computer is configured to output a first cold air control signal, a second cold air control signal, and a hot air control signal according to the measured temperature and angular displacement, wherein the first cold air control signal is used to control a flow rate of the first cold air unit 5, the second cold air control signal is used to control a flow rate of the second cold air unit 6, and the hot air control signal is used to control a flow rate and a temperature of the hot air unit 8.
Control nuclear power steam generator circumferential weld heat treatment process through above-mentioned intelligent control system, the calculation host computer is according to real-time supervision's the inside temperature measurement data of nuclear power steam generator and the angle displacement measurement data of bearing plate 21, control the operation of two sets of cold wind units, send cold wind (normal atmospheric temperature air) to steam generator's inside region, control hot-blast unit's operation, send hot-blast (heated air) to inside downside region, control through outside injection, make the inside gas of nuclear power steam generator flow according to the direction of design, make each local temperature even, the deformation degree that avoids the inhomogeneous arouse of temperature is different, the dent on the prevention U type pipe 22 produces.
Specifically, in the cooling stage of the circular seam heat treatment process, the first cold air unit 5 sends cold air to the small end of the lower cylinder along the jacket 3, the second cold air unit 6 sends the cold air into the inner sleeve 2 through the air inlet channel 41 on the bottom sealing plate 4, and the air flow direction is the horizontal arrow direction shown in fig. 3; the hot air unit 8 sends the heated air into the secondary side pipe bundle through a first hand hole 11 close to the ground, and the air flow direction is the vertical arrow direction shown in fig. 3; meanwhile, the second hand hole 12 is opened to discharge air, and the rest of the interfaces or pipes are closed, or the rest two hand holes (the third hand hole 13, as shown in fig. 4) in the horizontal direction can be opened according to the temperature and angular displacement monitoring data to assist in air discharge.
Similarly, the device can also be used in the temperature rising stage and the heat preservation stage of the circular seam heat treatment process, the first cold air unit 5 sends cold air to the small end of the lower cylinder body along the jacket 3, the cold air returns to the large end after being blocked by the inner wall at the small end, and the air flow direction is the horizontal arrow direction shown in fig. 6; at this time, the second air cooler unit 6 does not work; the hot air unit 8 sends the heated air into the secondary side pipe bundle through a first hand hole 11 close to the ground, and the air flow direction is the vertical arrow direction shown in fig. 6; meanwhile, the exhaust channel 42 on the bottom closing plate 4 is opened to exhaust air, and other interfaces or pipelines are closed.
In the temperature rising stage, the heat preservation stage and the temperature reduction stage, the computer controls the operation parameters of the cold air unit and the hot air unit in real time according to the temperature and the angular displacement monitoring data so as to enable the angular displacement measurement data, namely the deformation quantity, to meet the design requirements.
It should be noted that, the calculation host pre-stores a calculation module, and executes the following steps:
step one, establishing a univariate angular displacement time sequence model and a multivariate statistical model;
outputting first prediction data according to the single variable angular displacement time sequence model to the real-time input angular displacement measurement data of the support plate, wherein the first prediction data reflects the predicted angular displacement change condition of the support plate after preset time; inputting temperature measurement data in real time according to the multivariate statistical model, and outputting second prediction data, wherein the second prediction data reflects the predicted angular displacement change condition of the support plate after preset time;
weighting the value of the first prediction data and the value of the second prediction data through a weighting algorithm to obtain a prediction result value;
and step four, generating a first cold air control signal, a second cold air control signal and a hot air control signal according to the prediction result value.
In some embodiments, the air outlet of each blower may be provided with a hose or a metal pipe to connect with the corresponding vent holes of the bottom sealing plate 4, the jacket 3 and the first hand hole 11, and each vent hole may be provided with a flange to facilitate the connection and fixation with the hose or the metal pipe.
In some embodiments, as shown in fig. 7 and 8, the second cooling unit 6 includes a fan 65 and an electric control cabinet 64, the fan 65 and the electric control cabinet 64 are installed on a hoisting platform 100, the electric control cabinet 64 is electrically connected to the computer and is provided with a PLC device or a single chip microcomputer for controlling the fan 65, the hoisting platform 100 is provided with a hoisting point 101 for facilitating integral hoisting, and a flexible adhesive tape is installed at the bottom of the fan for reducing vibration during operation of the fan. Similarly, the same mounting structure can also be adopted by the first air cooler unit.
In some embodiments, the hot air unit includes a fan, an electric heating device, and two electric control cabinets for controlling the fan and the heating device, respectively, and the installation structure is similar to that of the second cold air unit, and is not described herein again.
Through setting up hoist and mount platform, the removal to suitable position of the hot-blast unit of not only being convenient for, cold wind unit to with electric wire and gas pipeline preview fixed and connection, avoid the repeated dismantlement and the installation of at every turn using, in order to do benefit to and improve the operating efficiency, avoid the connection error in the installation.
In some embodiments, the flow requirement of the first air cooler unit and/or the second air cooler unit is greater than 10000m 3 H, rated power is 45 kw; the flow requirement of the hot air unit is more than 10000m 3 H, rated power of 45 kw.
In some embodiments, the cold air control device and the hot air control device in fig. 5 include an electric control cabinet, and the electric control cabinet is connected with the fan through an ethernet Modbus protocol.
In some embodiments, the electronic control cabinet is connected to the computing host via the S7 free communication protocol and/or the TC/IP protocol.
In some embodiments, as shown in fig. 5, the computing host is electrically connected to a display device for displaying at least one of the measured temperature, the measured angular displacement, the value of the first prediction data, and the second prediction data to an operator.
In some embodiments, the first air cooler unit is further provided with a filtering device for filtering foreign matters in air input into the nuclear power steam generator; similarly, the second cold air unit and the hot air unit can also be provided with a filtering device.
In some embodiments, as shown in fig. 4, the air intake passage 41 includes a plurality of second air intake holes 411, the second air intake holes 411 are located on the upper and lower sides of the horizontal dividing line of the bottom closure plate 4, and the number of the second air intake holes 411 located on the upper side of the horizontal dividing line is 2 times that of the second air intake holes 411 located on the lower side of the horizontal dividing line.
Preferably, as shown in fig. 4, there are three sets of the second intake holes 411, two of which are located at the upper side of the horizontal dividing line and one of which is located at the lower side of the horizontal dividing line. More preferably, each set is provided with 4 second air inlet holes 411, 8 (2 sets) are positioned at the upper side of the horizontal dividing line, 4 (1 set) are positioned at the lower side of the horizontal dividing line, and the 12 second air inlet holes 411 are connected with the second fan set.
When the circumferential weld is subjected to heat treatment, hot air is gathered upwards, so that the upper part of the transverse nuclear power steam generator is higher than the lower part temperature, and in the cooling stage, the hot air on the upper part is discharged in time, so that more cold air inlet openings are arranged on the upper side of the horizontal parting line of the bottom sealing plate 4, and the upper part of the nuclear power steam generator is cooled.
In some embodiments, the second air cooling unit 6 further includes a second connection pipe 62 and a second valve 61, which are the same in number as the second air inlet 411, as shown in fig. 7, the second valve 61 is disposed at the air outlet end 63 of the second air cooling unit 6, and the second connection pipe correspondingly connects the second air inlet 411 and the second valve 61 (not shown in the figure). For example, as shown in fig. 8, the number of the second valves 61 is 12, and the second valves are respectively connected to the 12 second air intake holes 411 of the bottom sealing plate 4 as shown in fig. 4, so that the flow rates of the cool air entering the different second air intake holes 411 can be better controlled by the opening degree of the second valves 61, thereby realizing the adjustment of the local intake air volume.
In some embodiments, as shown in fig. 3 and 6, the intelligent control system for preventing the TUBEDING of the nuclear steam generator further comprises a third air cooler 7, a second hand hole 12 of the third air cooler 7, the second hand hole 12 being located on the opposite side of the first hand hole 11, i.e. the side away from the ground, the second hand hole 12 being communicated with the inner sleeve 2. As shown in fig. 5, the computer is electrically connected to the third air cooling unit 7 to output a third air cooling control signal, and the third air cooling control signal is used to control the flow rate of the third air cooling unit 7.
In some embodiments, the flow requirement of the third air cooler package is greater than 1500m 3 H, rated power of 5.5 kw.
The cold air input by the first cold air unit and/or the second cold air unit is heated in a path from the large end to the small end of the lower cylinder, and fresh cold air can be supplemented into the nuclear power steam generator by inputting the cold air from the second hand hole 12 at the top of the small end of the lower cylinder, so that a better cooling effect is achieved.
In some embodiments, the third cooling air unit 7 comprises a counter-rotating fan, and the third cooling air control signal is further used for controlling the operation direction of the third cooling air unit 7.
The working state of the forward rotation or the reverse rotation of the third air cooler unit 7 is controlled by the computer, cold air can be input into the nuclear power steam generator or hot air can be extracted out of the nuclear power steam generator, and therefore the temperature inside the nuclear power steam generator can be better controlled.
In some embodiments, the third cooling air unit 7 is further provided with a three-way valve 71, and the third cooling air unit 7 is connected with the second hand hole 12 through the three-way valve 71.
Through setting up three-way valve 71, the first way of three-way valve 71 is connected third cold air unit 7, and second hand hole 12 is connected to the second way, and third way intercommunication atmosphere when not needing third cold air unit 7 to nuclear power steam generator input cold wind promptly, also need not follow nuclear power steam generator when extracting steam, can be with second hand hole 12 intercommunication atmosphere to be convenient for discharge nuclear power steam generator's steam.
In some embodiments, the gas circuit equipment of the intelligent control system for preventing the turbo-steam generator from being tubedng further includes a jacket air inlet plate 9, the jacket air inlet plate 9 is installed at a position of the jacket 3 close to the bottom sealing plate 4, as shown in fig. 9, a plurality of first air inlet holes 92 are opened at an edge position of the jacket air inlet plate 9, and the first air inlet holes 92 are connected to the first air cooling unit 5.
Preferably, as shown in fig. 9, the first air intake holes 92 are uniformly distributed along the circumferential direction of the jacket air intake plate 9.
Through setting up and pressing from both sides cover air inlet plate 9, can be better realize pressing from both sides the sealed of cover 3 to for first cold air unit 5 provides fixed cold wind transport interface.
In some embodiments, the jacket inlet plate 9 and the bottom closure plate 4 may be integrated into a single plate, mounted to the large end of the lower cylinder.
In some embodiments, the first air cooler unit 5 further includes first connection pipes and first valves, the number of the first connection pipes is the same as that of the first air inlet holes 92, the first valves are disposed at the air outlet end of the first air cooler unit 5, and the first connection pipes are correspondingly connected to the first air inlet holes 92 and the first valves. Taking the number of the first air inlet holes 92 as 12 examples, 12 first air inlet holes 92 are uniformly distributed on the jacket air inlet plate 9 clockwise, and the first air cooler unit 5 is correspondingly provided with 12 first valves which are connected with the first air inlet holes 92 through first connecting pipes.
In some embodiments, as shown in fig. 4, the exhaust passage 42 is provided at the edge of the bottom closure plate 4 on the side close to the ground.
At the intensification stage and the heat preservation stage of circumferential weld thermal treatment, exhaust channel 42 opens the exhaust, through set up exhaust channel 42 in the marginal position that bottom shrouding 4 is close to ground one side, is favorable to the guide to follow the flow direction of design from the lower floor flow discharge from the cold air that first air-cooler unit presss from both sides the cover and gets into to discharge nuclear power steam generator's lower part hot-air, reduce the difference in temperature of upper portion and lower part, make the inside temperature of nuclear power steam generator even.
In some embodiments, as shown in fig. 10, the intelligent control system for preventing the tube of the nuclear steam generator further includes a central control device, in which a host computer, a display device and a blower control device are installed. The display device is connected with the calculation host and is used for displaying one of temperature measurement data, angular displacement measurement data, operation data of the first cold air unit, operation data of the second cold air unit and operation data of the hot air unit or simultaneously displaying the combination of the data. The fan control device is connected with the calculation host, and can be used for manually inputting or adjusting the operating parameters of the fan, specifically, the operating parameters comprise at least one of a first cold air control signal, a second cold air control signal and a hot air control signal. The fan control device may be a control button or knob, an input device connected to the computing host, or a touch device.
In some embodiments, as shown in fig. 10, the central control apparatus further includes an authority control device, electrically connected to the fan control device, for providing an operation authority of the fan control device, and the fan control device can only operate when the authority control device is open. The authority control device can be a control device using an entity key, and can also be a fingerprint identification device or other identification devices.
In some embodiments, the intelligent control system for preventing the turbo-steam generator from being used for generating the cooling air is further provided with a fan data acquisition device, the fan data acquisition device is used for acquiring fan unit operation state data of the first cold air unit, the second cold air unit and the hot air unit, and the computer is further used for outputting a first cooling air control signal, a second cooling air control signal and a hot air control signal according to the fan unit operation state data.
Preferably, fan data acquisition device includes the differential flowmeter, the differential flowmeter is installed in the air-out pipeline of fan.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is simple, and for the relevant points, reference may be made to the partial description of the system embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. An intelligent control system for preventing TUBED of a nuclear power steam generator, the nuclear power steam generator comprising a shell and an inner sleeve disposed inside the shell, the shell and the inner sleeve having a jacket therebetween, the intelligent control system comprising:
the bottom sealing plate is arranged at the large-end opening of the shell, an air inlet channel is arranged at the center of the bottom sealing plate, and an exhaust channel is arranged at the edge of the bottom sealing plate;
the flow rate of the first cold air unit is controllable, the first cold air unit is connected with the jacket, and the second cold air unit is connected with the air inlet channel;
the hot air unit is connected with a first hand hole, when the circular seam heat treatment is carried out, the nuclear power steam generator is horizontally placed along the axis direction, and the first hand hole is a hand hole which is close to the ground and is communicated with the inner sleeve;
the temperature sensors are used for measuring the temperatures of different areas of the nuclear power steam generator;
a plurality of angular displacement sensors for measuring displacement of a support plate, the support plate being mounted in the inner sleeve;
the calculation host is electrically connected with the temperature sensors, the angular displacement sensors, the cold air units and the hot air units and used for outputting a first cold air control signal, a second cold air control signal and a hot air control signal according to the measured temperature and angular displacement in the cooling stage of the circular seam heat treatment;
the first cold air control signal is used for controlling the flow of the first cold air unit, the second cold air control signal is used for controlling the flow of the second cold air unit, and the hot air control signal is used for controlling the flow and the temperature of the hot air unit.
2. The intelligent control system for preventing TUBEDING of a nuclear steam generator as claimed in claim 1, wherein said air intake passage includes a plurality of second air intake holes, and the number of the second air intake holes located above the horizontal dividing line of said bottom plate is 2 times the number of the second air intake holes located below the horizontal dividing line.
3. The intelligent control system for preventing the TUBEDING of the nuclear power steam generator as claimed in claim 2, wherein the second cooling air unit further comprises a second connecting pipe and a second valve, the number of the second connecting pipe and the number of the second valve are the same as that of the second air inlet hole, the second valve is arranged at the air outlet end of the second cooling air unit, and the second connecting pipe is correspondingly connected with the second air inlet hole and the second valve.
4. The intelligent control system for preventing TUBEDING of a nuclear power steam generator according to claim 1, further comprising a third cold air blower connected to a second hand hole, said second hand hole communicating with said inner sleeve and being located on the opposite side of said first hand hole;
the computer host is electrically connected with the third cold air unit to output a third cold air control signal, and the third cold air control signal is used for controlling the flow of the third cold air unit.
5. The intelligent control system for preventing TUBEDING of a nuclear power steam generator according to claim 4, wherein said third cooling air unit comprises a forward and reverse fan, and said third cooling air control signal is further used for controlling the operation direction of the third cooling air unit.
6. The intelligent control system for preventing TUBEDING of a nuclear power steam generator according to claim 4, wherein said third cold air unit is connected to said second hand hole by a three-way valve.
7. The intelligent control system for preventing the TUBED of a nuclear steam generator according to claim 1, further comprising a jacket air inlet plate, wherein said jacket air inlet plate is installed on said jacket near said bottom sealing plate;
a plurality of first air inlets are formed in the edge position of the jacket air inlet plate, and the first air inlet is connected with the first air cooling unit.
8. The intelligent control system for preventing TUBEDING of a nuclear steam generator as recited in claim 7, wherein said first intake ports are uniformly arranged on said jacket intake plate in a circumferential direction.
9. The intelligent control system for preventing the TUBEDING of the nuclear power steam generator as claimed in claim 8, wherein the first cold air unit further comprises a first connecting pipe and a first valve, the number of the first connecting pipe is the same as that of the first air inlet holes, the first valve is arranged at the air outlet end of the first cold air unit, and the first connecting pipe is correspondingly connected with the first air inlet holes and the first valve.
10. The intelligent control system for preventing TUBEDING of a nuclear power generator as claimed in claim 1, wherein said exhaust channel is disposed at the edge of the ground-facing side of said bottom plate.
11. The intelligent control system for preventing TUBEDING of a nuclear steam generator according to claim 1, further comprising a central control device, wherein said host computer, a display device and a blower control device are installed in said central control device;
the display device is used for displaying any one or combination of temperature measurement data, angular displacement measurement data, operation data of the first cold air unit, operation data of the second cold air unit and operation data of the hot air unit;
the fan control device is used for adjusting at least one operation parameter of the first cold air control signal, the second cold air control signal and the hot air control signal.
12. The intelligent control system for preventing TUBEDING of a nuclear power steam generator as claimed in claim 11, wherein said central control apparatus further comprises an authority control device electrically connected to said fan control device for providing an operation authority of said fan control device.
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