Calibration device of on-line boron meter

Abstract

The utility model discloses a calibration device of an online boron meter. The calibration device comprises a mixed calibration container, a liquid level measurement assembly, a main circulation pipeline, a liquid pump, a liquid discharge branch, a clear water branch and a concentrated boron branch. The mixing calibration container is used for storing boric acid solution. The liquid level measuring assembly is arranged on the mixing calibration container and used for measuring the liquid level change in the mixing calibration container. The main circulation pipeline is connected with the mixed calibration container. The liquid pump is arranged on the main circulation pipeline and used for providing power for the boric acid solution to circularly flow in the main circulation pipeline. The liquid discharging branch is connected with the main circulation pipeline and used for discharging the boric acid solution in the main circulation pipeline. The clear water branch is connected with the main circulation pipeline and used for inputting water into the main circulation pipeline. The concentrated boron branch is connected with the main circulation pipeline and used for inputting concentrated boron mother liquor into the main circulation pipeline. The device is simple to operate, high in working efficiency and low in labor cost when the boric acid solution is replaced, radioactive substances are prevented from being diffused, and the volume of the replaced boric acid solution can be automatically and accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a calibration device for an on-line boron meter. Background Art

[0002] The energy in a nuclear power plant is obtained through a self-sustaining chain nuclear fission reaction, and the reactor power depends on the neutron flux density level in the reactor core. In a pressurized water reactor nuclear power plant, one of the methods to control the reactor power operation is to add a neutron absorber - boric acid to the primary coolant, and the reactor chain reaction is controlled by adjusting the boron concentration in the primary loop. Therefore, it is particularly important to monitor the boron concentration in the primary coolant in real time, and the on-line boron meter is an instrument for monitoring the boron concentration in the primary coolant in real time.

[0003] Generally, the on-line boron meter needs to be calibrated once in each fuel cycle to ensure the accuracy of the boron meter. When calibrating the on-line boron meter, the on-line boron meter needs to be connected to the calibration device in the related technology through two metal hoses, and then different gradient boron concentration solutions need to be manually prepared in the calibration water tank of the calibration device, the vacuum pump of the calibration device is started, the boric acid solution is circulated to the on-line boron meter, and then relevant technical means are used to calibrate and calibrate the on-line boron meter.

[0004] When manually preparing different gradient boron concentration solutions in the calibration water tank, specifically, it is necessary to first manually calculate the volume of the boric acid solution to be replaced, then scoop out the boric acid solution in the calibration water tank with a 10L plastic beaker according to the calculated volume, visually make up the volume according to the scale on the beaker wall, pour it into the waste water tank after visually determining that the volume is correct, and then add demineralized water or boric acid mother liquor with the same volume to the calibration water tank with a 10L beaker to achieve the purpose of preparing the target boric acid solution. Therefore, the calibration device in the related technology mainly has the following deficiencies:

[0005] 1. It is necessary to manually configure the boric acid solution, the process is complex, and the work efficiency is low.

[0006] When using the calibration device in the related technology to perform the on-line boron meter calibration task, it is necessary to first manually calculate the volume of the boric acid solution to be replaced according to the target boron concentration, and then manually replace the boric acid solution in the calibration water tank with the same volume according to the calculation result. The whole work process is complex. When calibrating the on-line boron meter, 16 target boron concentrations need to be manually prepared. After the on-line boron meter calibration is completed, 4 verification boron concentrations need to be manually prepared. On average, it takes about 3 minutes to prepare each boron concentration point, a total of 60 minutes, which is time-consuming and has low work efficiency.

[0007] 2. Radioactive waste liquid will drip on the equipment and the ground, posing a contamination risk.

[0008] When preparing boric acid solution using the calibration device in the related art, it is necessary to scoop out the boric acid solution in the calibration water tank with a beaker. Since the liquid in the calibration water tank contains radioactivity, when scooping out the solution with the beaker in direct contact with the solution, a certain amount of radioactive liquid will remain on the cup wall, which may splash on the equipment, the ground or personnel, resulting in a great risk of radioactive material diffusion and radioactive contamination of personnel or equipment.

[0009] 3. The error source is large, affecting the accuracy of the on-line boron meter calibration.

[0010] When manually preparing the target boric acid solution using the calibration device in the related art, it is necessary to fix the volume with a beaker and manually visually confirm the volume by the scale. Since the beaker itself is not a precise quantitative container, visual inspection will increase the deviation artificially and there is a risk of misreading, making the volume of the replaced boric acid solution inaccurate, thus affecting the accuracy of the on-line boron meter calibration.

[0011] 4. Increase the demand for human resources.

[0012] Usually, when calibrating the on-line boron meter during the major overhaul, two people need to be arranged. One person is responsible for calculation and sampling for boron measurement, and the other person is responsible for manually preparing the target boric acid solution. In the case of tight human resources during the major overhaul, it will increase the demand for human resources, add an extra burden to the post, and reduce the operation ability of the post. Utility Model Content

[0013] The technical problem to be solved by the present utility model is to provide a calibration device for an on-line boron meter in view of at least one defect existing in the related art mentioned in the above background technology: when manually replacing the boric acid solution with the calibration device in the related art, the operation is complex, the work efficiency is low, the labor cost is high, there is a risk of radioactive material diffusion, and the volume of the replaced boric acid solution cannot be accurately obtained.

[0014] The technical solution adopted by the present utility model to solve its technical problem is to construct a calibration device for an on-line boron meter, including:

[0015] A mixing calibration container for storing boric acid solution;

[0016] A liquid level measurement component provided on the mixing calibration container for measuring the liquid level change in the mixing calibration container;

[0017] A main circulation pipeline connecting the mixing calibration container;

[0018] A liquid pump provided on the main circulation pipeline for providing power for the cyclic flow of the boric acid solution in the main circulation pipeline;

[0019] A drain branch, the drain branch is connected to the main circulation pipeline, and the drain branch is used to drain the boric acid solution in the main circulation pipeline;

[0020] A fresh water branch, the fresh water branch is connected to the main circulation pipeline, and the fresh water branch is used to input water into the main circulation pipeline; and,

[0021] A concentrated boron branch, the concentrated boron branch is connected to the main circulation pipeline, and the concentrated boron branch is used to input concentrated boron mother liquor into the main circulation pipeline.

[0022] In one embodiment, the calibration device for the on-line boron meter further includes:

[0023] A first reversing valve, the first reversing valve includes a first valve port, a second valve port and a third valve port, the first valve port and the second valve port are connected to the main circulation pipeline, and the third valve port is connected to the drain branch;

[0024] A second reversing valve, the second reversing valve includes a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port and the fifth valve port are connected to the main circulation pipeline, and the sixth valve port is connected to the fresh water branch; and,

[0025] A third reversing valve, the third reversing valve includes a seventh valve port, an eighth valve port and a ninth valve port, the seventh valve port and the eighth valve port are connected to the main circulation pipeline, and the ninth valve port is connected to the concentrated boron branch.

[0026] In one embodiment, the calibration device for the on-line boron meter further includes:

[0027] A first switching valve and a second switching valve, the first switching valve is arranged on the fresh water branch, and the second switching valve is arranged on the concentrated boron branch.

[0028] In one embodiment, the calibration device for the on-line boron meter further includes:

[0029] A boron meter inlet branch and a boron meter outlet branch, one ends of the boron meter inlet branch and the boron meter outlet branch are respectively connected to the main circulation pipeline, and the other ends are respectively used to connect an on-line boron meter.

[0030] In one embodiment, the calibration device for the on-line boron meter further includes:

[0031] A third switching valve, the third switching valve is arranged on the main circulation pipeline between the boron meter inlet branch and the boron meter outlet branch.

[0032] In one embodiment, the calibration device for the on-line boron meter further includes:

[0033] A flowmeter, the flowmeter is arranged on the boron meter inlet branch.

[0034] In one embodiment, the calibration device for the on-line boron meter further includes:

[0035] A sampling branch and a fourth switching valve. The sampling branch is connected to the main circulation pipeline, and the fourth switching valve is arranged on the sampling branch.

[0036] In one embodiment, the calibration device for the on-line boron meter further includes:

[0037] A controller and a host computer. The host computer is communicatively connected to the controller. The controller is respectively communicatively connected to the liquid level measurement component, the liquid pump, the first reversing valve, the second reversing valve, and the third reversing valve. The controller is further configured to be communicatively connected to a remote client.

[0038] In one embodiment, the liquid level measurement component includes:

[0039] A laser rangefinder and a liquid level gauge tube. The liquid level gauge tube is installed inside the mixing and calibration container, and the laser rangefinder is installed at the opening of the mixing and calibration container through a rotary folding structure.

[0040] In one embodiment, the calibration device for the on-line boron meter further includes:

[0041] A heating component and a temperature sensor. The heating component and the temperature sensor are arranged on the mixing and calibration container. The heating component is used to heat the boric acid solution, and the temperature sensor is used to monitor the temperature of the boric acid solution; and,

[0042] A heat dissipation component. The heat dissipation component is arranged at the mixing and calibration container and is used to dissipate heat from the boric acid solution.

[0043] By implementing the present utility model, the following beneficial effects are achieved:

[0044] The calibration device for the on-line boron meter disclosed by the present utility model can displace the boric acid solution in the mixing and calibration container through the liquid discharge branch, the clean water branch, and the concentrated boron branch, thereby avoiding the manual replacement of the boric acid solution with a beaker, making the replacement operation simple, with high working efficiency, low labor cost, and avoiding the diffusion of radioactive substances. Moreover, through the liquid level measurement component, the liquid level change in the mixing and calibration container can be automatically and accurately measured to accurately obtain the volume of the displaced boric acid solution, thereby ensuring the accuracy of the on-line boron meter calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0046] Figure 1Shows a schematic diagram of the composition of a calibration device for an on-line boron meter according to an embodiment of the present utility model;

[0047] Figure 2 Shows a schematic diagram of the first external structure of a calibration device for an on-line boron meter according to an embodiment of the present utility model;

[0048] Figure 3 Shows a schematic diagram of the second external structure of a calibration device for an on-line boron meter according to an embodiment of the present utility model;

[0049] Figure 4 Shows a schematic diagram of the structure of a liquid level measurement component according to an embodiment of the present utility model;

[0050] Figure 5 Shows a schematic diagram of the first internal structure of a calibration device for an on-line boron meter according to an embodiment of the present utility model;

[0051] Figure 6 Shows a schematic diagram of the second internal structure of a calibration device for an on-line boron meter according to an embodiment of the present utility model;

[0052] Figure 7 Shows a logical structure diagram of a host computer, a controller and a client according to an embodiment of the present utility model. Detailed implementation manners

[0053] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings.

[0054] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0055] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "a plurality" means two or more.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", "arrangement", and "location" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] As Figure 1 shown, some embodiments of the present utility model disclose a calibration device for an online boron meter, including a mixing calibration container 11, a liquid level measurement component 12, a main circulation pipeline 13, a liquid pump 14, a liquid discharge branch 15, a fresh water branch 16, and a concentrated boron branch 17, specifically as follows:

[0058] As Figure 1 and Figure 2 shown, the mixing calibration container 11 is used to store boric acid solution. The mixing calibration container 11 includes an open container body 111 and a lid (not shown), and the lid seals the opening of the container body 111.

[0059] As Figure 1 and Figure 4 shown, the liquid level measurement component 12 is arranged on the mixing calibration container 11, and the liquid level measurement component 12 is used to measure the liquid level change in the mixing calibration container 11.

[0060] As Figure 1 , Figure 5 and Figure 6 shown, the main circulation pipeline 13 is connected to the mixing calibration container 11, and the liquid pump 14 is arranged on the main circulation pipeline 13. The liquid pump 14 is used to provide power for the cyclic flow of boric acid solution in the main circulation pipeline 13.

[0061] As Figure 1 , Figure 3 and Figure 6 shown, the liquid discharge branch 15 is connected to the main circulation pipeline 13, and the liquid discharge branch 15 is used to discharge the boric acid solution in the main circulation pipeline 13. Specifically, one end of the liquid discharge branch 15 is connected to the main circulation pipeline 13, and the other end of the liquid discharge branch 15 is used to connect to a collection container. When the liquid discharge branch 15 is in communication with the main circulation pipeline 13, the liquid discharge branch 15 is used to discharge the boric acid solution in the main circulation pipeline 13.

[0062] As Figure 1 , Figure 2 and Figure 5As shown, the fresh water branch 16 is connected to the main circulation pipeline 13, and the fresh water branch 16 is used to input water into the main circulation pipeline 13. Specifically, one end of the fresh water branch 16 is connected to the main circulation pipeline 13, and the other end of the fresh water branch 16 is used to connect to an external water source. When the fresh water branch 16 is connected to the main circulation pipeline 13, the fresh water branch 16 is used to input water into the main circulation pipeline 13, such as demineralized water. The demineralized water here is only an example and does not limit the present application.

[0063] As Figure 1 , Figure 2 and Figure 5 shown, the concentrated boron branch 17 is connected to the main circulation pipeline 13, and the concentrated boron branch 17 is used to input concentrated boron mother liquor into the main circulation pipeline 13. Specifically, one end of the concentrated boron branch 17 is connected to the main circulation pipeline 13, and the other end of the concentrated boron branch 17 is used to connect to an external concentrated boron source. When the concentrated boron branch 17 is connected to the main circulation pipeline 13, the concentrated boron branch 17 is used to input concentrated boron mother liquor into the main circulation pipeline 13.

[0064] The calibration device of the online boron meter disclosed in this embodiment can replace and mix the boric acid solution in the mixing calibration container 11 through the drain branch 15, the fresh water branch 16, and the concentrated boron branch 17, thereby avoiding the manual replacement of the boric acid solution with a beaker, making the replacement operation simple, with high work efficiency, low labor cost, and avoiding the diffusion of radioactive substances. Moreover, through the liquid level measurement component 12, the liquid level change in the mixing calibration container 11 can be automatically and accurately measured to accurately obtain the volume of the replaced boric acid solution, thereby ensuring the accuracy of the online boron meter calibration.

[0065] In addition, the device is connected to an external container for containing water (i.e., the water source) and an external container for containing concentrated boron mother liquor (i.e., the concentrated boron source) through quick connectors, which can effectively reduce the volume of the device main body. When the device is washed after use, the container for containing concentrated boron mother liquor can be directly removed for cleaning, and for the pipeline part, only fresh water needs to be added to the mixing calibration container 11, and which branch needs to be cleaned can be connected to the main circulation pipeline 13.

[0066] In some embodiments, as Figure 1 , Figure 5 and Figure 6 shown, the calibration device of the online boron meter further includes a first reversing valve 18, a second reversing valve 19, and a third reversing valve 20, specifically as follows:

[0067] As Figure 1As shown, the first reversing valve 18 includes a first valve port 181, a second valve port 182, and a third valve port 183. The first valve port 181 and the second valve port 182 are connected to the main circulation pipeline 13, and the third valve port 183 is connected to the liquid discharge branch 15. When the first valve port 181 is in communication with the second valve port 182 and the third valve port 183, the main circulation pipeline 13 is in communication with the liquid discharge branch 15, and the boric acid solution can be discharged through the liquid discharge branch 15. When the first valve port 181 is in communication with the second valve port 182, the main circulation pipeline 13 is disconnected from the liquid discharge branch 15. For example, the first reversing valve 18 is an electric three-way valve. The electric three-way valve here is only an example and does not limit the present application.

[0068] As Figure 1 shown, the second reversing valve 19 includes a fourth valve port 191, a fifth valve port 192, and a sixth valve port 193. The fourth valve port 191 and the fifth valve port 192 are connected to the main circulation pipeline 13, and the sixth valve port 193 is connected to the fresh water branch 16. When the fourth valve port 191 is in communication with the fifth valve port 192 and the sixth valve port 193, the main circulation pipeline 13 is in communication with the fresh water branch 16, and the fresh water branch 16 inputs water into the main circulation pipeline 13. When the fourth valve port 191 is in communication with the fifth valve port 192, the main circulation pipeline 13 is disconnected from the fresh water branch 16. For example, the second reversing valve 19 is an electric three-way valve. The electric three-way valve here is only an example and does not limit the present application.

[0069] As Figure 1 shown, the third reversing valve 20 includes a seventh valve port 201, an eighth valve port 202, and a ninth valve port 203. The seventh valve port 201 and the eighth valve port 202 are connected to the main circulation pipeline 13, and the ninth valve port 203 is connected to the concentrated boron branch 17. When the seventh valve port 201 is in communication with the eighth valve port 202 and the ninth valve port 203, the main circulation pipeline 13 is in communication with the concentrated boron branch 17, and the concentrated boron branch 17 is used to input concentrated boron mother liquor into the main circulation pipeline 13. When the seventh valve port 201 is in communication with the eighth valve port 202, the main circulation pipeline 13 is disconnected from the concentrated boron branch 17. For example, the third reversing valve 20 is an electric three-way valve. The electric three-way valve here is only an example and does not limit the present application.

[0070] In some embodiments, as Figure 1 、 Figure 5 and Figure 6 shown, in order to further prevent water or boric acid mother liquor from leaking into the main circulation pipeline 13 and causing a change in the boron concentration of the boric acid solution, the calibration device of the on-line boron meter further includes a first switching valve 21 and a second switching valve 22. The first switching valve 21 is provided on the fresh water branch 16, and the second switching valve 22 is provided on the concentrated boron branch 17. For example, the first switching valve 21 and the second switching valve 22 are electromagnetic isolation valves. The electromagnetic isolation valves here are only examples and do not limit the present application.

[0071] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 shown, the calibration device of the on-line boron meter further includes a boron meter inlet branch 23 and a boron meter outlet branch 24. One ends of the boron meter inlet branch 23 and the boron meter outlet branch 24 are respectively connected to the main circulation pipeline 13, and the other ends are respectively used to connect to an on-line boron meter (not shown) so that the boric acid solution flows through the on-line boron meter. Among them, the size of the main circulation pipeline 13 is larger than that of the boron meter inlet branch 23 and the boron meter outlet branch 24. For example, the main circulation pipeline 13 is a one-inch pipe, and the boron meter inlet branch 23 and the boron meter outlet branch 24 are two-inch pipes. Most of the flow rate of the boric acid solution will pass through the main circulation pipeline 13 during circulation.

[0072] In some embodiments, such as Figure 1 and Figure 6 shown, in order to control the flow rate into the boron meter inlet branch 23, the calibration device of the on-line boron meter further includes a third switching valve 25. The third switching valve 25 is arranged on the main circulation pipeline 13 between the boron meter inlet branch 23 and the boron meter outlet branch 24. When the third switching valve 25 is closed smaller, the flow rate passing through the third switching valve 25 becomes smaller. Relatively, the flow rate of the boric acid solution flowing through the boron meter inlet branch 23 and the boron meter outlet branch 24 will become larger, accelerating the mixing speed of the boric acid solution in the boron meter inlet branch 23 and the boron meter outlet branch 24. For example, the third switching valve 25 is an electric two-way valve. The electric two-way valve here is only an example and does not limit the present application.

[0073] In some embodiments, such as Figure 1 and Figure 6 shown, the calibration device of the on-line boron meter further includes a flow meter 26. The flow meter 26 is arranged on the boron meter inlet branch 23. The flow meter 26 can monitor the circulation flow rate, and the repeatability accuracy can reach ±0.15%. For example, the flow meter 26 is an ultrasonic flow meter, which can monitor the flow rate of the boric acid solution in the boron meter inlet branch 23 and the boron meter outlet branch 24 in real time. The flow meter 26 and the third switching valve 25 cooperate to accurately control the flow rate of the boric acid solution in the boron meter inlet branch 23 and the boron meter outlet branch 24, facilitating the control of the mixing of boric acid after the boric acid solution is configured.

[0074] In some embodiments, such as Figure 1 shown, the calibration device of the on-line boron meter further includes a sampling branch 27 and a fourth switching valve 28. The sampling branch 27 is connected to the main circulation pipeline 13, and the fourth switching valve 28 is arranged on the sampling branch 27. And, such as Figure 4As shown, the sampling port of the sampling branch 27 is located at the opening of the mixing calibration container 11. Even if dripping occurs during sampling, it can be recovered into the mixing calibration container 11. Specifically, one end of the sampling branch 27 is connected to the main circulation pipeline 13, and the other end of the sampling branch 27 is used to be connected to an external sampling container. By controlling the opening degree of the fourth switching valve 28, the specified sampling flow rate can be satisfied. For example, the fourth switching valve 28 is a two-way valve with manual switching. Here, the two-way valve with manual switching is only an example and does not limit the present application.

[0075] The controller of the calibration device in the related art can only control the temperature of the boric acid solution at 30 ± 1°C according to the real-time temperature data collected by the temperature sensor. Therefore, it is impossible to realize the comprehensive control function for the rest of the electrical equipment in the device. Further, it is necessary to manually start the pump, stop the pump or prepare the liquid, thus increasing the workload of the on-site personnel. It belongs to a manually controlled device and cannot realize remote monitoring and operation, which is not conducive to real-time control of the device operation and monitoring of the operation parameters. Therefore, in some embodiments, such as Figure 2 and Figure 7 As shown, the calibration device of the on-line boron meter further includes a controller 31 and a host computer 32. The host computer 32 is communicatively connected to the controller 31. The host computer 32 can output a control signal to the controller 31 according to the volume of the boric acid solution to be replaced. The controller 31 is respectively communicatively connected to the liquid level measurement assembly 12, the liquid pump 14, the first reversing valve 18, the second reversing valve 19, the third reversing valve 20, the first switching valve 21, the second switching valve 22, the third switching valve 25 and the flow meter 26 and realizes control. The controller 31 is further used to be communicatively connected to a remote client 33. For example, the controller 31 is a PLC, and the remote client 33 is a mobile terminal or a PC terminal. The controller 31, the host computer 32 and the client 33 are located in the same local area network through a router 34. Here, the PLC, the mobile terminal and the PC terminal are only examples and do not limit the present application. It should be noted here that the above-mentioned communication connection is two-way, including the transmission of control signals and data.

[0076] The calibration device of the on-line boron meter in this embodiment can realize the automatic control of multiple electrical components through the controller 31 and the host computer 32, reduce the labor cost, and can remotely monitor and control the operation of the device through the remote client 33.

[0077] In some embodiments, the calibration device of the on-line boron meter further includes a data interface 35. The data interface 35 is electrically connected to the host computer 32. The data interface 35 is used to export the calibration data. For example, the data interface 35 is a USB interface. Here, the USB interface is only an example and does not limit the present application.

[0078] In some embodiments, the calibration device of the online boron meter further includes a device emergency stop trigger 36. The device emergency stop trigger 36 is electrically connected to the controller 31. When the device operates abnormally, the device emergency stop trigger 36 is used to trigger the controller 31 to control the stop of operation and reset, so as to avoid abnormal calibration. For example, the device emergency stop trigger 36 is a button. The button here is only an example and does not limit the present application.

[0079] In some embodiments, the calibration device of the online boron meter further includes an indication unit 37. The indication unit 37 is electrically connected to the controller 31. The indication unit 37 is used to display the operating state of the device. For example, the indication unit 37 is an indicator light, and different operating states can be represented by displaying different colors. The indicator light here is only an example and does not limit the present application.

[0080] In some embodiments, as Figure 4 shown, the liquid level measurement assembly 12 includes a laser rangefinder 121 and a liquid level gauge tube 122. The liquid level gauge tube 122 is installed inside the mixing calibration container 11. The laser rangefinder 121 is communicatively connected to the controller 31. The laser rangefinder 121 is installed at the opening of the mixing calibration container 11 through a rotary folding structure 123. When the laser rangefinder 121 is not in use, the laser rangefinder 121 can be folded down back into the barrel, and the cover is covered to prevent dust from entering the container body 111. Specifically, in the height direction of the mixing calibration container 11, the liquid level gauge tube 122 is vertically installed along the inner side wall surface of the container body 111. The laser rangefinder 121 is installed on the liquid level gauge tube 122 through the rotary folding structure 123. The rotary folding structure 123 includes a fixed frame, a rotating shaft and a rotating frame. The fixed frame is installed on the liquid level gauge tube 122, and the rotating frame is installed on the fixed frame through the rotating shaft to realize rotation around the axis. The laser rangefinder 121 is installed on the rotating frame, and there is a reflective float in the liquid level gauge tube 122. The reflective float serves as a liquid level reflection reference and is used in cooperation with the laser rangefinder 121 to obtain the height of the liquid level change. The laser rangefinder 121 sends the liquid level information to the host computer 32 through the controller 31, and the host computer 32 processes to obtain the flow rate of each replacement discharge and perfusion.

[0081] In some embodiments, the calibration device of the online boron meter further includes a heating component (not shown) and a temperature sensor (not shown). The controller 31 is communicatively connected to the heating component and the temperature sensor to implement control. The heating component and the temperature sensor are arranged on the mixing calibration container 11. The heating component is used to heat the boric acid solution, and the temperature sensor is used to monitor the temperature of the boric acid solution. For example, the heating component is a heating plate with at least two groups of heating wires and is arranged at the bottom of the mixing calibration container 11, and each group of heating wires can work separately.

[0082] In some embodiments, as Figure 2As shown, the calibration device of the on-line boron meter further includes a heat dissipation component 29. The controller 31 is communicatively connected to the heat dissipation component 29 to achieve control. The heat dissipation component 29 is arranged at the mixing calibration container 11 and is used to dissipate heat from the boric acid solution. For example, the heat dissipation component 29 is a fan group. The calibration device of the on-line boron meter further includes a housing 30. The fan group is arranged at the housing 30 corresponding to the mixing calibration container 11, and heat exchange between the boric acid solution and the air at the wall surface of the container body 111 is accelerated through air flow to achieve heat dissipation.

[0083] When the automatic temperature control is turned on, when the temperature sensor monitors in real time that the temperature of the boric acid solution is lower than the preset temperature and the difference between the two is outside the preset range, the controller 31 will control at least two groups of heating wires to start heating the boric acid solution together. When the temperature sensor monitors in real time that the temperature of the boric acid solution is lower than the preset temperature and the difference between the two is within the preset range, the controller 31 will control a single group of heating wires to heat the boric acid solution. When the temperature sensor monitors in real time that the temperature of the boric acid solution is higher than the preset temperature, the controller 31 will control the heat dissipation component 29 to start cooling treatment.

[0084] It should be noted here that the connection between the above valve ports and components or between components is only a physical structure connection, and the communication relationship and liquid flow direction relationship therein are not uniquely defined.

[0085] Specifically, the method for replacing the boric acid solution in the calibration device of the on-line boron meter is the equal-volume replacement method. Each time, the same volume of boric acid solution is discharged, and the same volume of boric acid mother liquor or water is added.

[0086] The process of concentrated replacement or dilution replacement is as follows: The upper computer 32 calculates the volume of the boric acid solution to be replaced. The controller 31 controls the liquid pump 14 to start, controls the first reversing valve 18 to rotate, connects the drain branch 15 to the main circulation pipeline 13, and discharges the boric acid solution to be replaced. When the volume of the discharged boric acid solution reaches the target volume, the first reversing valve 18 is controlled to reverse, and the drain branch 15 is disconnected from the main circulation pipeline 13.

[0087] The controller 31 controls the first switching valve 21 (or the second switching valve 22) to open and controls the second reversing valve 19 (or the third reversing valve 20) to rotate. The fresh water branch 16 (or the concentrated boron branch 17) is connected to the main circulation pipeline 13, and water (or concentrated boron mother liquor) equal to the discharged boric acid solution is added. When the added solution reaches the target value, the second reversing valve 19 (or the third reversing valve 20) is controlled to reverse and the first switching valve 21 (or the second switching valve 22) is controlled to close, and the fresh water branch 16 (or the concentrated boron branch 17) is disconnected from the main circulation pipeline 13.

[0088] The online boron meter is connected to the main circulation pipeline 13, and the liquid pump 14 keeps running. In the first stage, the opening of the third switching valve 25 can be fully opened to allow the boric acid solution in the main circulation pipeline 13 to be fully mixed first. In the second stage, taking the boric acid solution in the mixing boron meter inlet branch 23, the boron meter outlet branch 24 and the online boron meter as the main part, the opening of the third switching valve 25 is closed slightly to guide the boric acid solution to pass through the online boron meter. When the value reflected by the online boron meter counter stabilizes, the primary calibration condition is reached, and thus one replacement is completed.

[0089] Then, the specific calibration method can refer to the existing technology. For example, the online boron meter continuously measures the boron concentration through its internal detection device (including a neutron detector and a neutron source). When the boric acid solution flows through the online boron meter, the neutrons emitted by the neutron source will react with boron-10 (B-10), and the number of neutrons absorbed is positively correlated with the boron concentration in the boric acid solution. The neutron detector is responsible for capturing the unabsorbed neutrons and converting them into electrical pulse signals and transmitting them to the boron meter neutron receiver cabinet. The boron meter neutron receiver cabinet reads the average neutron count rate. At the same time, it is necessary to sample the boric acid solution through the sampling branch 17 and chemically titrate the corresponding boron concentration. The boron meter neutron receiver cabinet performs a second-order fitting based on the read neutron count rate and the boron concentration obtained by sampling and titration to calculate the coefficient of this calibration, thereby realizing the calibration and calibration of the online boron meter.

[0090] By implementing the present utility model, the following beneficial effects are achieved:

[0091] The calibration device of the online boron meter disclosed in the present utility model can replace and mix the boric acid solution in the mixing calibration container through the liquid discharge branch, the fresh water branch and the concentrated boron branch, thereby avoiding manually replacing the boric acid solution with a beaker, making the replacement operation simple, with high work efficiency, low labor cost and avoiding the diffusion of radioactive substances. Moreover, through the liquid level measurement component, the liquid level change in the mixing calibration container can be automatically and accurately measured to accurately obtain the volume of the replaced boric acid solution, thereby ensuring the accuracy of the online boron meter calibration.

[0092] It can be understood that the above embodiments only represent some implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent of the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above or below embodiments; therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. An online boron meter calibration device, characterized in that, Comprising: A mixing and calibration container (11) for storing boric acid solution; A liquid level measurement assembly (12) provided on the mixing and calibration container (11) for measuring the liquid level change in the mixing and calibration container (11); A main circulation pipeline (13) connecting the mixing and calibration container (11); A liquid pump (14) provided on the main circulation pipeline (13) for providing power for the cyclic flow of boric acid solution in the main circulation pipeline (13); A liquid discharge branch (15) connecting the main circulation pipeline (13) for discharging the boric acid solution in the main circulation pipeline (13); A fresh water branch (16) connecting the main circulation pipeline (13) for inputting water into the main circulation pipeline (13); And, A concentrated boron branch (17) connecting the main circulation pipeline (13) for inputting concentrated boron mother liquor into the main circulation pipeline (13).

2. The calibration device for the online boron meter according to claim 1, characterized in that, The calibration device for the on-line boron meter further includes: A first reversing valve (18) including a first valve port (181), a second valve port (182) and a third valve port (183), wherein the first valve port (181) and the second valve port (182) are connected to the main circulation pipeline (13), and the third valve port (183) is connected to the liquid discharge branch (15); A second reversing valve (19) including a fourth valve port (191), a fifth valve port (192) and a sixth valve port (193), wherein the fourth valve port (191) and the fifth valve port (192) are connected to the main circulation pipeline (13), and the sixth valve port (193) is connected to the fresh water branch (16); and A third reversing valve (20) including a seventh valve port (201), an eighth valve port (202) and a ninth valve port (203), wherein the seventh valve port (201) and the eighth valve port (202) are connected to the main circulation pipeline (13), and the ninth valve port (203) is connected to the concentrated boron branch (17).

3. The calibration device for the on-line boron meter according to claim 1, characterized in that, The calibration device for the on-line boron meter further includes: A first switching valve (21) and a second switching valve (22), wherein the first switching valve (21) is provided on the fresh water branch (16), and the second switching valve (22) is provided on the concentrated boron branch (17).

4. The calibration device for the on-line boron meter according to claim 1, characterized in that, The calibration device for the on-line boron meter further includes: A boron meter inlet branch (23) and a boron meter outlet branch (24), one ends of the boron meter inlet branch (23) and the boron meter outlet branch (24) are respectively connected to the main circulation pipeline (13), and the other ends are respectively used for connecting an on-line boron meter.

5. The calibration device for the on-line boron meter according to claim 4, characterized in that, The calibration device for the on-line boron meter further includes: A third switching valve (25), which is arranged on the main circulation pipeline (13) between the boron meter inlet branch (23) and the boron meter outlet branch (24).

6. The calibration device of the online boron meter according to claim 4, characterized in that, The calibration device of the on-line boron meter further comprises: A flowmeter (26), which is arranged on the boron meter inlet branch (23).

7. The calibration device for the on-line boron meter according to claim 1, characterized in that, The calibration device of the on-line boron meter further comprises: A sampling branch (27) and a fourth switching valve (28), wherein the sampling branch (27) is connected to the main circulation pipeline (13), and the fourth switching valve (28) is arranged on the sampling branch (27).

8. The calibration device for the on-line boron meter according to claim 2, characterized in that, The calibration device of the on-line boron meter further comprises: A controller (31) and a host computer (32), wherein the host computer (32) is communicatively connected to the controller (31), the controller (31) is respectively communicatively connected to the liquid level measurement component (12), the liquid pump (14), the first reversing valve (18), the second reversing valve (19) and the third reversing valve (20), and the controller (31) is further used for communicatively connecting to a remote client (33).

9. The calibration device of the on-line boron meter according to claim 1, characterized in that, The liquid level measurement component (12) comprises: A laser rangefinder (121) and a liquid level gauge tube (122), wherein the liquid level gauge tube (122) is installed inside the mixing calibration container (11), and the laser rangefinder (121) is installed at the opening of the mixing calibration container (11) through a rotating and folding structure (123).

10. The calibration device for the on-line boron meter according to claim 1, characterized in that, The calibration device of the on-line boron meter further comprises: A heating component and a temperature sensor, wherein the heating component and the temperature sensor are arranged on the mixing calibration container (11), the heating component is used for heating the boric acid solution, and the temperature sensor is used for monitoring the temperature of the boric acid solution; and A heat dissipation component (29), which is arranged at the mixing calibration container (11), and the heat dissipation component (29) is used for dissipating heat from the boric acid solution.

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