Automatic dispensing system and method for highly radioactive liquid

Abstract

The present disclosure provides a system and method for automatically dispensing highly radioactive liquids. In this system, a local dispensing device includes a raw liquid tank, a clean water tank, a calibration water tank, a dispensing injection pump, a four-way valve, a three-way valve, a liquid parameter monitoring module, and a control module. The raw liquid tank and the clean water tank are connected to the calibration water tank via the four-way valve, the dispensing injection pump, and the three-way valve. The liquid parameter monitoring module is arranged on a pipeline between the four-way valve and the dispensing injection pump. The liquid parameter monitoring module is used to collect the flow rate and pressure of the liquid output by the four-way valve. A remote monitoring device is used to first generate a cleaning instruction based on the dispensing requirements, and then generate a corresponding dispensing control instruction based on a preset dispensing concentration, flow rate, and pressure. The control module is used to clean the pipeline between the four-way valve and the three-way valve upon receiving the cleaning instruction. Upon receiving the dispensing control instruction, the control module inputs a target volume of the highly radioactive liquid and / or water to be dispensed into the calibration water tank, thereby obtaining a highly radioactive liquid with a preset dispensing concentration.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automatic dispensing of highly radioactive liquids, and in particular to a system and method for automatically dispensing highly radioactive liquids. Background Art

[0002] Currently, the preparation of highly radioactive liquids is mostly done manually. For example, boric acid in highly radioactive liquids requires regular manual titration for boron meter calibration. Typically, an online boron meter needs to be calibrated once per fuel cycle to ensure accuracy. Calibration involves manually preparing different gradients of boron solution in a calibration tank and circulating it through the meter. A water bath is controlled to heat the solution, maintaining a stable temperature of 30°C ± 1°C in the calibration circuit. The neutron count rate obtained by the meter is then recorded, and the boron solution in the calibration tank is sampled for chemical titration to determine the boron concentration corresponding to the neutron count rate. The neutron receiving cabinet in the meter performs a quadratic fit based on the neutron count rate reading and the boron concentration obtained from the titrated sample to calculate the calibration coefficient, thereby achieving complete calibration of the meter.

[0003] However, the existing boron meter calibration has many disadvantages, such as complex operation: manual preparation of boron solution requires the operator to strictly follow the prescribed steps, the process is relatively complicated, prone to errors, and the operator needs to have certain professional knowledge; cumbersome steps: from the preparation of boron solution to the measurement of boron concentration, multiple steps are involved, such as solution preparation, heating, sampling, titration, etc., which makes the whole process cumbersome and time-consuming; multiple sources of error and low precision: using non-precise quantitative containers (such as beakers) for liquid preparation is prone to errors, and manual visual confirmation of capacity is also prone to misreading, biased reading and other problems, these errors will affect the accuracy of the boron meter calibration; risk of radioactive leakage: during manual operation, radioactive leakage may occur due to operational errors or other reasons, which will have adverse effects on operators and the environment; relatively low efficiency: during manual operation, the operator needs to spend a lot of time to complete cumbersome steps, thereby reducing the overall operating efficiency. Therefore, the existing liquid preparation technology for highly radioactive liquids has problems such as complex operation, low precision and relatively low efficiency. Summary of the Invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the present disclosure provides a highly radioactive liquid automatic dispensing system and method, the main purpose of which is to improve the dispensing accuracy and efficiency of highly radioactive liquids.

[0006] According to a first aspect of the present disclosure, an automatic liquid dispensing system for highly radioactive liquids is provided, comprising a local liquid dispensing device and a remote monitoring device, wherein the local liquid dispensing device comprises a raw liquid tank, a clean water tank, a calibration water tank, a liquid dispensing injection pump, a four-way valve, a three-way valve, a liquid parameter monitoring module, and a control module; the raw liquid tank and the clean water tank are connected to the liquid dispensing injection pump via the four-way valve, the liquid dispensing injection pump is connected to the calibration water tank via the three-way valve, and the three-way valve is also connected to a waste liquid tank; and the liquid parameter monitoring module is arranged on a pipeline between the four-way valve and the liquid dispensing injection pump;

[0007] The raw liquid tank is used to store the highly radioactive liquid to be prepared; the clean water tank is used to store water; the liquid injection pump is used to deliver the liquid output by the four-way valve to the calibration water tank; the calibration water tank is used to receive the highly radioactive liquid to be prepared and / or the highly radioactive liquid prepared by the water with a preset concentration; the liquid parameter monitoring module is used to collect the flow rate and pressure of the liquid output by the four-way valve and deliver them to the remote monitoring device;

[0008] The remote monitoring device is used to first generate a cleaning instruction based on the liquid preparation requirement, then obtain a target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, and generate a corresponding liquid preparation control instruction based on the target volume, the flow rate, and the pressure;

[0009] The control module is configured to, upon receiving the cleaning instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, so as to clean the pipeline between the four-way valve and the three-way valve and deliver the cleaning waste liquid to the waste liquid tank; and, upon receiving the liquid preparation control instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid to be prepared and / or the water into the calibration water tank, thereby obtaining the highly radioactive liquid having the preset preparation concentration.

[0010] In one embodiment of the present disclosure, the local liquid dispensing device further includes a plurality of temperature control modules, each temperature control module includes a temperature sensor, a temperature controller and a heater, and the raw liquid tank and the calibration water tank are respectively configured with a temperature control module.

[0011] In one embodiment of the present disclosure, the heater is a flat plate heater.

[0012] In one embodiment of the present disclosure, the calibration water tank includes a stirring motor and a stirring paddle.

[0013] In one embodiment of the present disclosure, the local liquid dispensing device also includes a decontamination module, which includes a decontamination tank, a spray module and a collection module. The decontamination tank is connected to the four-way valve, and the decontamination tank is used to clean the pipeline between the four-way valve and the calibration water tank after the liquid dispensing is completed. The spray module is arranged in the calibration water tank, and the spray module is used to clean the calibration water tank after the liquid dispensing is completed. The collection module is connected to the calibration water tank, and the collection module is used to collect waste liquid after cleaning the calibration water tank.

[0014] In one embodiment of the present disclosure, the local liquid preparation device further includes a liquid concentration sensor and a liquid level switch arranged in the calibration water tank, wherein the liquid concentration sensor is used to detect the liquid concentration of the highly radioactive liquid in the calibration water tank; the liquid level switch is used to detect the liquid level of the highly radioactive liquid in the calibration water tank; and the remote monitoring device is further used to obtain the target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, the liquid concentration, and the liquid level.

[0015] In one embodiment of the present disclosure, the automatic liquid dispensing system for highly radioactive liquids further includes a box, the local liquid dispensing device is arranged in the box, and a plurality of Forma wheels are provided at the bottom of the box.

[0016] In one embodiment of the present disclosure, the automatic dispensing system for highly radioactive liquids further includes a radiation shield, which covers the box.

[0017] According to a second embodiment of the present disclosure, there is provided a method for automatically dispensing highly radioactive liquids based on the automatic dispensing system for highly radioactive liquids according to the first embodiment, comprising:

[0018] The remote monitoring device first generates a cleaning instruction based on the liquid distribution requirements;

[0019] When receiving the cleaning instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, so as to clean the pipeline between the four-way valve and the three-way valve and send the cleaning waste liquid to the waste liquid tank;

[0020] After cleaning is completed, the remote monitoring device obtains the target volume of the highly radioactive liquid and / or water to be prepared based on the preset preparation concentration, and generates corresponding liquid preparation control instructions based on the target volume, the flow rate and pressure of the liquid output by the four-way valve;

[0021] When receiving the liquid preparation control instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid to be prepared and / or the water into the calibration water tank, thereby obtaining the highly radioactive liquid with the preset preparation concentration.

[0022] In one embodiment of the present disclosure, the liquid concentration and liquid level of the highly radioactive liquid in the calibration water tank are obtained; the remote monitoring device is further used to obtain the target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, the liquid concentration and the liquid level.

[0023] In one or more embodiments of the present disclosure, a local liquid dispensing device and a remote monitoring device are included. The local liquid dispensing device includes a raw liquid tank, a clean water tank, a calibration water tank, a liquid dispensing injection pump, a four-way valve, a three-way valve, a liquid parameter monitoring module and a control module. The raw liquid tank and the clean water tank are connected to the liquid dispensing injection pump via the four-way valve, the liquid dispensing injection pump is connected to the calibration water tank via the three-way valve, and the three-way valve is also connected to the waste liquid tank. The liquid parameter monitoring module is arranged on the pipeline between the four-way valve and the liquid dispensing injection pump. The raw liquid tank is used to store highly radioactive liquid to be prepared; the clean water tank is used to store water; the liquid dispensing injection pump is used to send the liquid output by the four-way valve to the calibration water tank; the calibration water tank is used to receive the highly radioactive liquid to be prepared and / or the highly radioactive liquid prepared by water with a preset preparation concentration; the liquid parameter monitoring module is used to collect the four-way valve. The flow rate and pressure of the liquid output by the four-way valve are sent to a remote monitoring device; the remote monitoring device is used to first generate a cleaning instruction based on the liquid preparation requirement, then obtain a target volume of the highly radioactive liquid and / or water to be prepared based on a preset preparation concentration, and generate a corresponding liquid preparation control instruction based on the target volume, flow rate and pressure; the control module is used to control the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected when receiving the cleaning instruction, so as to clean the pipeline between the four-way valve and the three-way valve and send the cleaning waste liquid to the waste liquid tank; and when receiving the liquid preparation control instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid and / or water to be prepared into the calibration water tank, thereby obtaining a highly radioactive liquid with a preset preparation concentration. In this case, before dispensing, a cleaning instruction is generated based on the dispensing requirements to clean the pipe between the four-way valve and the three-way valve. This prevents residual liquid on the pipe wall from affecting the concentration of the prepared liquid in the calibration water tank, thereby improving the dispensing accuracy of the highly radioactive liquid to a certain extent. In addition, the automatic dispensing of highly radioactive liquid with a preset concentration by combining the local dispensing device and the remote monitoring device is more efficient than the existing manual dispensing method. In summary, the system according to the present disclosure improves the dispensing accuracy and efficiency of highly radioactive liquid.

[0024] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A block diagram of an automatic dispensing system for highly radioactive liquids provided by an embodiment of the present disclosure is shown;

[0027] Figure 2 A connection diagram of a local liquid dispensing device provided by an embodiment of the present disclosure is shown;

[0028] Figure 3 A connection diagram of a remote monitoring device provided by an embodiment of the present disclosure is shown;

[0029] Figure 4 A flow chart of an automatic method for dispensing highly radioactive liquids provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. It should also be understood that the term "and / or" used in the present disclosure refers to and includes any or all possible combinations of one or more associated listed items.

[0033] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0034] The present disclosure provides a highly radioactive liquid automatic dispensing system and method, the main purpose of which is to improve the dispensing accuracy and efficiency of highly radioactive liquids.

[0035] In a first embodiment, Figure 1 A block diagram of an automatic dispensing system for highly radioactive liquids provided by an embodiment of the present disclosure is shown. Figure 2 FIG2 shows a connection diagram of a local liquid dispensing device provided by an embodiment of the present disclosure. The automatic liquid dispensing system for highly radioactive liquids in the present disclosure may be referred to as an automatic liquid dispensing system. Figure 1 As shown, the automatic dispensing system 10 for highly radioactive liquid includes a local dispensing device 11 and a remote monitoring device 12 .

[0036] In this embodiment, the local liquid preparation device 11 is used to automatically prepare a highly radioactive liquid with a preset preparation concentration based on the control of the remote monitoring device 12 .

[0037] In this embodiment, if Figure 2 As shown, the local liquid dispensing device 11 includes a raw liquid tank, a clean water tank, a calibration water tank, a liquid dispensing injection pump, a four-way valve, and a three-way valve. The raw liquid tank and the clean water tank are connected to the liquid dispensing injection pump via the four-way valve, and the liquid dispensing injection pump is connected to the calibration water tank via the three-way valve. The three-way valve is also connected to the waste liquid tank.

[0038] In this embodiment, the raw liquid tank is used to store the highly radioactive liquid to be prepared. The highly radioactive liquid disclosed in the present invention may be, for example, boric acid, so the raw liquid tank is a boric acid raw liquid tank. The volume of the boric acid raw liquid tank is, for example, 20L (see Figure 2 In some embodiments, the bottom of the raw liquid tank is further provided with a drain port, which is connected to the first external device via a drain pipe. The drain pipe is provided with a solenoid valve and a control valve. When the type of highly radioactive liquid in the raw liquid tank needs to be changed, the solenoid valve and the control valve are connected to discharge the existing highly radioactive liquid in the raw liquid tank.

[0039] In this embodiment, the clean water tank is used to store water. The volume of the clean water tank is, for example, 20L (see Figure 2 In some embodiments, the clean water tank further comprises a drain port at the bottom thereof, which is connected to a second external device via a drain pipe. The drain pipe is provided with a solenoid valve and a control valve. When the water in the clean water tank needs to be replaced, the solenoid valve and the control valve are connected to drain the existing water in the clean water tank.

[0040] In this embodiment, if Figure 2 As shown, the first liquid inlet of the four-way valve is connected to the raw liquid tank, the second liquid inlet of the four-way valve is connected to the clean water tank, and the liquid outlet of the four-way valve is connected to the liquid injection pump. The four-way valve is used to discharge the highly radioactive liquid to be prepared stored in the raw liquid tank when the first channel between the first liquid inlet and the liquid outlet is open; it is also used to discharge the water stored in the clean water tank when the second channel between the second liquid inlet and the liquid outlet is open. The opening and closing of the first and second channels of the four-way valve are controlled by the control module.

[0041] In this embodiment, the four-way valve is, for example, an electric four-way valve.

[0042] In some embodiments, as Figure 2 As shown, the local liquid dispensing device 11 also includes a first valve and a second valve. The first valve is further provided on the pipeline between the first liquid inlet of the four-way valve and the raw liquid tank, and its on / off function is controlled by the control module. The second valve is further provided on the pipeline between the second liquid inlet of the four-way valve and the clean water tank, and its on / off function is also controlled by the control module.

[0043] In this embodiment, the liquid injection pump is used to deliver the liquid output by the four-way valve to the calibration water tank. The operating state of the liquid injection pump is controlled by the control module. By controlling the liquid injection pump, the flow rate and flow rate of the liquid in the pipeline can be controlled.

[0044] In this embodiment, if Figure 2 As shown, the three-way valve's inlet is connected to a liquid injection pump, its first outlet is connected to a calibration water tank, and its second outlet is connected to a waste tank. The three-way valve is designed to deliver liquid entering the valve to the calibration water tank when the first channel between the inlet and the first outlet is open. It is also designed to deliver liquid (i.e., pipeline flushing and drainage) to the waste tank when the second channel between the inlet and the second outlet is open. The opening and closing of the first and second channels of the three-way valve are controlled by a control module.

[0045] In this embodiment, the three-way valve is, for example, an electric three-way valve.

[0046] In this embodiment, the local liquid dispensing device 11 further includes a liquid parameter monitoring module, which is arranged on the pipeline between the four-way valve and the liquid dispensing injection pump.

[0047] In this embodiment, the liquid parameter monitoring module includes a pressure sensor and a flow sensor, and is used to collect the flow rate and pressure of the liquid output by the four-way valve and transmit them to the remote monitoring device.

[0048] In this embodiment, the calibration water tank is used to receive the highly radioactive liquid to be prepared and / or the highly radioactive liquid to be prepared with water having a preset concentration. The volume of the calibration water tank is, for example, 21 L (see Figure 2 ).

[0049] In the embodiments of the present disclosure, Figure 2 As shown, the calibration water tank includes a stirring motor and a stirring paddle. The stirring motor controls the operation of the stirring paddle, which stirs the solution in the calibration water tank. This ensures rapid mixing of the solution in the calibration water tank.

[0050] In an embodiment of the present disclosure, the local liquid dispensing device 11 further includes a plurality of temperature control modules, each temperature control module including a temperature sensor, a temperature controller and a heater, and the raw liquid tank and the calibration water tank are respectively equipped with a temperature control module. In an embodiment of the present disclosure, a flat plate heater is used as the heater. The temperature controller may be a thyristor temperature controller. The temperature sensor may be, for example, a PT100 temperature probe with an error of 0.05. In this case, temperature control with a linear accuracy of 30±0.1 can be achieved by a high-precision thermostat and a PT100 temperature probe, thereby achieving high-precision temperature control. Compared with a heating rod, the flat plate pressurizer generates heat more evenly and is less prone to scaling.

[0051] Specifically, the local liquid dispensing device 11 includes a first temperature control module and a second temperature control module. The raw liquid tank is equipped with the first temperature control module. The calibration water tank is equipped with the second temperature control module. The first temperature control module includes a first temperature sensor, a first temperature controller, and a first flat plate heater. The first temperature sensor is arranged in the raw liquid tank. The first flat plate heater is arranged at the bottom of the raw liquid tank. The first temperature sensor is used to detect the temperature of the liquid in the raw liquid tank, the first temperature controller is used to control the operation of the first flat plate heater, and the first flat plate heater is used to heat the liquid in the raw liquid tank. The second temperature control module includes a second temperature sensor, a second temperature controller, and a second flat plate heater. The second temperature sensor is arranged in the calibration water tank. The second flat plate heater is arranged at the bottom of the calibration water tank. The second temperature sensor is used to detect the temperature of the liquid in the calibration water tank, the second temperature controller is used to control the operation of the second flat plate heater, and the second flat plate heater is used to heat the liquid in the calibration water tank.

[0052] In this embodiment, the local liquid dispensing device 11 further includes a control module. Upon receiving a cleaning instruction from the remote monitoring device 12, the control module is configured to control the corresponding channels in the four-way valve and the channel between the three-way valve and the waste liquid tank to clean the pipeline between the four-way and three-way valves and deliver the cleaning waste liquid to the waste liquid tank to ensure the accuracy of the prepared solution. Upon receiving a liquid dispensing control instruction from the remote monitoring device 12, the control module controls the corresponding channels in the four-way valve and the channel between the three-way valve and the calibration water tank to operate the liquid dispensing injection pump to deliver the target volume of the highly radioactive liquid and / or water to be prepared into the calibration water tank, thereby obtaining a highly radioactive liquid with a preset preparation concentration. This allows for the preparation of highly radioactive liquid with a precise concentration.

[0053] Specifically, if the liquid preparation requirement is to prepare a highly radioactive liquid having a preset temperature and a preset configuration concentration, the control module, upon receiving a cleaning instruction from the remote monitoring device 12, controls the first valve to be opened, and controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be opened. Liquid in the raw liquid tank is output to clean the pipe between the four-way valve and the three-way valve, and the cleaning waste liquid is sent through the three-way valve into the waste liquid tank. After the cleaning is completed, the control module, upon receiving a liquid preparation control instruction from the remote monitoring device 12, controls the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be opened, controls the liquid preparation injection pump and the stirring motor to operate, and sequentially inputs the corresponding target volumes of the highly radioactive liquid to be prepared and water into the calibration water tank. The corresponding target volumes of the highly radioactive liquid to be prepared and water are uniformly mixed under stirring by the stirring paddle. Based on the liquid preparation control instruction, the second temperature controller controls the second flat heater to heat the solution in the calibration water tank until it reaches the preset temperature, thereby obtaining a highly radioactive liquid having the preset temperature and the preset configuration concentration.

[0054] In an embodiment of the present disclosure, the local liquid preparation device further includes a liquid concentration sensor and a liquid level switch arranged in the calibration water tank. The liquid concentration sensor is used to detect the liquid concentration of the highly radioactive liquid in the calibration water tank; the liquid level switch is used to detect the liquid level of the highly radioactive liquid in the calibration water tank; and the remote monitoring device is further used to obtain a target volume of the highly radioactive liquid and / or water to be prepared based on a preset preparation concentration, liquid concentration, and liquid level.

[0055] In some embodiments, a first drain port is further provided at the bottom of the calibration water tank. The first drain port is connected to a third external device via a drain pipe. The drain pipe is provided with a solenoid valve and a control valve. When the highly radioactive liquid in the calibration water tank needs to be drained, the solenoid valve and the control valve are connected to allow the highly radioactive liquid in the calibration water tank to be discharged.

[0056] In some embodiments, the local liquid distribution device also includes a constant speed circulation pump and a switch valve. A second liquid discharge port is also provided at the bottom of the calibration water tank. The second liquid discharge port is connected to a fourth external device through a calibration liquid sampling pipeline. The constant speed circulation pump and the switch valve are arranged on the calibration liquid sampling pipeline. After a highly radioactive liquid with a preset configuration concentration is configured, if the liquid needs to be sampled, the control module controls the constant speed circulation pump to work, the switch valve is turned on, and the constant speed circulation pump sends the liquid in the calibration water tank to the fourth external device for sampling. If the liquid in the calibration water tank is boric acid calibration liquid, the fourth external device is a boron meter (see Figure 2 The boron meter is connected to the calibration liquid sampling pipeline through a detectable tube joint and a conversion joint (Swagelok joint).

[0057] In some embodiments, the calibration water tank is further provided with a liquid return port. The connection between the calibration liquid sampling pipeline and the fourth external device can also be connected to the liquid return pipeline via a detectable tube connector and a conversion connector (Swagelok connector), and the liquid return pipeline is connected to the liquid return port. The residual sampled liquid can be returned to the calibration water tank through the liquid return pipeline, thereby achieving the function of no excess sampling loss and reflux. The liquid return pipeline is also provided with a liquid return control valve, and the on / off of the liquid return control valve is controlled by the control module.

[0058] If the liquid preparation requirement is to prepare multiple highly radioactive liquids of the same type with different preset concentrations, after obtaining the highly radioactive liquid of the first preset concentration, the highly radioactive liquids of the remaining preset concentrations are obtained by the equal volume replacement method. Taking the preparation of two boric acid with different preset concentrations as an example, if the concentration of the second boric acid calibration liquid is lower than the concentration of the first boric acid calibration liquid, the control module controls the second valve to be turned on upon receiving a cleaning instruction from the remote monitoring device, and controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be turned on. The liquid in the clean water tank is output to clean the pipeline between the four-way valve and the three-way valve, and the cleaning waste liquid is sent through the three-way valve into the waste liquid tank; after the cleaning is completed, the second valve is controlled to be closed, and the control module controls the solenoid valve and the control valve at the bottom of the calibration water tank to be turned on to discharge a certain volume of the first boric acid calibration liquid. The liquid level is accurately controlled to the liquid level switch position, and then the solenoid valve and the control valve are controlled to be closed. At this time, the concentration and volume of the calibration liquid in the calibration water tank (including the volume of the boric acid calibration liquid in the circulation pipeline) are known. The remote monitoring device can calculate the target volume of water to be added based on the concentration of the second boric acid calibration liquid, the first boric acid calibration liquid and the liquid level, and generate a liquid distribution control instruction. The control module controls the conduction of the second valve, the corresponding channel in the four-way valve, and the channel between the three-way valve and the calibration water tank, and controls the operation of the liquid distribution injection pump to input the target volume of water into the calibration water tank, thereby obtaining a second boric acid calibration liquid.

[0059] If the concentration of the second boric acid calibration solution is higher than that of the first boric acid calibration solution, the configuration process can refer to the above process, the difference being that the liquid in the stock liquid tank is used for cleaning, and the target volume of highly radioactive liquid in the stock liquid tank that needs to be added can be calculated based on the concentration of the second boric acid calibration solution, the first boric acid calibration solution, and the liquid level.

[0060] In an embodiment of the present disclosure, the local liquid dispensing device further includes a decontamination module, which includes a decontamination tank, a spray module, and a collection module. The decontamination tank is connected to the third liquid inlet of the four-way valve. The decontamination tank is used to clean the pipeline between the four-way valve and the calibration water tank after liquid dispensing is completed. The spray module is arranged in the calibration water tank and is used to clean the calibration water tank after liquid dispensing is completed. The collection module is connected to the calibration water tank and is used to collect waste liquid after cleaning the calibration water tank. The collection module can also process the waste liquid. In this way, the local liquid dispensing device can be decontaminated with radioactive substances, ensuring the cleanliness and safety of the system.

[0061] In this embodiment, the remote monitoring device 12 is used to control the local liquid preparation device 11 to automatically prepare a highly radioactive liquid with a preset concentration, and is also used to allow an operator to monitor the liquid preparation process in real time from a safe distance. The safe distance is determined by the radiation range of the highly radioactive liquid.

[0062] Specifically, in this embodiment, the remote monitoring device is used to first generate a cleaning instruction based on the liquid preparation requirement.

[0063] In this embodiment, the remote monitoring device may continuously generate cleaning instructions within a preset time period, and when the generation of the cleaning instructions stops, it indicates that the cleaning is completed.

[0064] In this embodiment, each time a new liquid of a preset concentration is configured, including configuring different types of liquids or liquids of the same type but different concentrations, the target liquid to be extracted (i.e., the liquid in the raw liquid tank or the water in the clean water tank) can be used to flush the pipeline first, and then measured extraction can be performed after flushing to ensure the accuracy of the configured solution.

[0065] In this embodiment, the remote monitoring device determines the target volume of the highly radioactive liquid and / or water to be prepared based on a preset preparation concentration, and generates corresponding liquid preparation control instructions based on the target volume, flow rate, and pressure, which are derived from a pressure sensor and a flow sensor.

[0066] In this embodiment, the remote monitoring device also obtains the liquid concentration in the calibration water tank collected by the liquid concentration sensor and the liquid temperature in the calibration water tank and the liquid temperature in the raw liquid tank collected by the temperature sensor.

[0067] Specifically, if the liquid preparation requirement is to prepare a highly radioactive liquid with a preset temperature and preset configuration concentration, the remote monitoring device will generate corresponding liquid preparation control instructions based on the target volume, liquid temperature, flow rate and pressure in the raw liquid tank; if the liquid preparation requirement is to prepare multiple highly radioactive liquids of the same type with different preset configuration concentrations, the remote monitoring device will also need to generate corresponding liquid preparation control instructions based on the liquid concentration and liquid level in the calibration water tank.

[0068] Figure 3 A connection diagram of a remote monitoring device provided by an embodiment of the present disclosure is shown.

[0069] like Figure 3 As shown, the remote monitoring device includes a PLC (Programmable Logic Controller) system, which includes a CPU (Central Processing Unit) module, an RS485 module and an AI / AO module.

[0070] The RS 485 module can control multiple temperature controllers in the local liquid dispensing device through the 485-Modbus-RTU protocol. The multiple temperature controllers include temperature controller 1 (i.e., the first temperature controller) and temperature controller 2 (i.e., the second temperature controller). The 485 module can send liquid dispensing control instructions through the 485-Modbus-RTU protocol to control the control module in the local liquid dispensing device to thereby control various pumps and valves. For example, the control module includes controller A and controller B. Controller A controls pump A (e.g., a liquid dispensing injection pump), and controller B controls pump B (e.g., a constant-speed circulation pump). The control module also includes other controllers, which control the on / off of valves such as four-way valves and three-way valves.

[0071] The AI / AO module is used to receive analog signals (including but not limited to temperature, flow, pressure, concentration, etc.) sent by the local liquid dispensing device, and to feed back analog signals to the local liquid dispensing device.

[0072] The CPU module of the PLC system is connected to a touch screen (e.g., a 10-inch HMI touch screen) via an industrial switch via an RJ45 Ethernet interface (i.e., RJ45-PROFINET). The screen can display a schematic diagram of the device circuit and the status of each control device, such as valve switch status, pump operation status, heater status, calibration water tank level status, real-time liquid flow status, liquid cumulative flow status, calibration solution temperature, etc., and the operation of the device can be controlled by controlling the screen.

[0073] The PLC system's CPU module is connected to a 4G IoT gateway via an industrial switch via an RJ45 Ethernet port. Using the 4G IoT gateway and an external antenna, the device's current status and control parameters can be uploaded to the cloud via the 4G network. By programming and drawing control screens in the cloud, the device's operating status can be monitored and remotely controlled via mobile apps and PC software. Furthermore, multiple users can be authorized, and through permission control, different users can have different operational permissions. For example, some users can only monitor screen parameters but not operate them. Alternatively, some users can only monitor certain screens, and screens without permission cannot be previewed. Administrator users have full permissions and can operate and edit screens.

[0074] In this embodiment, by inputting liquid preparation requirements (including a preset concentration) on the touchscreen of the remote monitoring device, the CPU module generates a cleaning instruction and sends it to the control module via the RS485 module. After cleaning is complete, the CPU module calculates the liquid preparation requirements (output from the touchscreen) and the analog signals (including real-time liquid parameters monitored by liquid concentration sensors, temperature sensors, pressure sensors, and flow sensors) sent by the local liquid preparation device and received by the AI / AO module. It generates liquid preparation control instructions and sends them to the control module via the RS485 module. This enables the automatic preparation of highly radioactive liquids. Furthermore, after liquid preparation is complete, a decontamination instruction is generated to activate the decontamination module, where a spray device sprays and cleans the calibration water tank, and a collection device collects and processes the cleaning liquid. After radioactive decontamination, the system's cleanliness and safety are guaranteed.

[0075] The touch screen can also display the temperature error between the actual temperature of the calibration solution. In the remote monitoring device, the constant temperature and temperature control error value (for example, within 0.2) can be input on the touch screen. The CPU module also comprehensively sets the constant temperature and temperature control error value to control the thermostat. Thus, through calibration, the error is reduced to within 0.2.

[0076] Taking safety, reliability and practicality into consideration, the remote monitoring device can also be equipped with liquid dispensing emergency stop and device emergency stop functions. These functions can be achieved by combining PLC control with hardware circuit design. Setting a virtual emergency stop button on the software interface can be used as an auxiliary control method. There are four specific methods:

[0077] PLC system control: Use the PLC system to control the device, and connect the emergency stop button to the input terminal of the PLC system. When the emergency stop button is triggered, the PLC system can execute the corresponding control logic to restore the relevant instrumentation and control equipment or the entire device to the initial shutdown state;

[0078] Hardware circuit optimization: Design an emergency stop circuit in the remote monitoring device and connect the liquid dispensing emergency stop button and the device emergency stop button to this circuit. When the emergency stop button is triggered, the circuit will immediately cut off the power supply to the relevant equipment, restoring them to their initial off state;

[0079] Add a safety relay: Use a safety relay to connect the emergency stop button to the relevant equipment. When the emergency stop button is triggered, the safety relay immediately cuts off the power to the relevant equipment, restoring the system to its initial shutdown state. The safety relay provides an additional measure of protection to ensure equipment safety.

[0080] Software control: If a touchscreen-based HMI (human-machine interface) is used for operation and monitoring, a virtual emergency stop button can be set on the software interface. When the user triggers the emergency stop function, the control software immediately sends a stop command to the controller, restoring the relevant equipment to its initial shutdown state.

[0081] In this embodiment, the remote monitoring device can transmit data with the control module, capture real-time images inside the system, and visually monitor and operate the liquid preparation process.

[0082] In some embodiments, the operator can also adjust the dispensing parameters on the touch screen according to the real-time monitoring data to ensure the accuracy and stability of the dispensing process.

[0083] In an embodiment of the present disclosure, the automatic liquid dispensing system for highly radioactive liquids further includes a housing, wherein the local liquid dispensing device is disposed within the housing, and a plurality of Forma wheels are disposed at the bottom of the housing. For example, the plurality may be four. This allows for free switching between rolling and locking states.

[0084] In an embodiment of the present disclosure, the automatic dispensing system for highly radioactive liquids further includes a radiation shield covering the housing to block radiation generated by the radioactive liquid. The shield is made of a radiation-shielding material such as high-density polyethylene or lead.

[0085] The automatic liquid dispensing system for highly radioactive liquids in the embodiment of the present disclosure includes a local liquid dispensing device and a remote monitoring device. The local liquid dispensing device includes a raw liquid tank, a clean water tank, a calibration water tank, a liquid dispensing injection pump, a four-way valve, a three-way valve, a liquid parameter monitoring module, and a control module. The raw liquid tank and the clean water tank are connected to the liquid dispensing injection pump via the four-way valve, and the liquid dispensing injection pump is connected to the calibration water tank via the three-way valve. The three-way valve is also connected to the waste liquid tank. The liquid parameter monitoring module is arranged on a pipeline between the four-way valve and the liquid dispensing injection pump. The raw liquid tank is used to store highly radioactive liquid to be prepared. The clean water tank is used to store water. The liquid dispensing injection pump is used to deliver liquid output by the four-way valve to the calibration water tank. The calibration water tank is used to receive highly radioactive liquid to be prepared and / or water to prepare highly radioactive liquid with a preset preparation concentration. The liquid parameter monitoring module is used to The flow rate and pressure of the liquid output by the four-way valve are collected and sent to a remote monitoring device; the remote monitoring device is used to first generate a cleaning instruction based on the liquid preparation requirement, then obtain a target volume of the highly radioactive liquid and / or water to be prepared based on a preset preparation concentration, and generate a corresponding liquid preparation control instruction based on the target volume, flow rate, and pressure; the control module is used to control the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected when receiving the cleaning instruction, so as to clean the pipeline between the four-way valve and the three-way valve and send the cleaning waste liquid to the waste liquid tank; and when receiving the liquid preparation control instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid and / or water to be prepared into the calibration water tank, thereby obtaining a highly radioactive liquid with a preset preparation concentration. In this case, before dispensing, a cleaning instruction is generated based on the dispensing requirements to clean the pipe between the four-way valve and the three-way valve. This prevents residual liquid on the pipe wall from affecting the concentration of the prepared liquid in the calibration water tank, thereby improving the dispensing accuracy of the highly radioactive liquid to a certain extent. In addition, the automatic dispensing of highly radioactive liquid with a preset concentration by combining the local dispensing device and the remote monitoring device is more efficient than the existing manual dispensing method. In summary, the system according to the present disclosure improves the dispensing accuracy and efficiency of highly radioactive liquid.

[0086] The disclosed method is a remote, unattended, automated dispensing system for highly radioactive liquids with radioactive decontamination capabilities. This system addresses numerous shortcomings associated with highly radioactive liquids by enabling real-time monitoring and control of the dispensing process through a remote monitoring device. Through optimized design and coordinated operation of various components, it achieves both automated dispensing and radioactive decontamination. Compared to traditional automated dispensing devices, the disclosed system can automatically dispense highly radioactive liquids without direct operator contact, offering high dispensing efficiency and accuracy. Furthermore, it provides radioactive decontamination capabilities, effectively protecting operator safety.

[0087] The following are examples of the disclosed methods. For details not disclosed in these examples, please refer to the disclosed system examples. These examples provide a method for automatically dispensing highly radioactive liquids. This method utilizes the highly radioactive liquid automatic dispensing system of the aforementioned system examples. The disclosed method for automatically dispensing highly radioactive liquids may be referred to as simply the automatic dispensing method.

[0088] Figure 4 FIG. 1 is a flow chart showing a method for automatically dispensing highly radioactive liquid provided by an embodiment of the present disclosure. Figure 4 As shown, the automatic dispensing method for highly radioactive liquid comprises:

[0089] Step S11, the remote monitoring device first generates a cleaning instruction based on the liquid preparation requirement;

[0090] Step S12: upon receiving the cleaning instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, so as to clean the pipeline between the four-way valve and the three-way valve, and send the cleaning waste liquid to the waste liquid tank;

[0091] Step S13: After the cleaning is completed, the remote monitoring device obtains a target volume of the highly radioactive liquid and / or water to be prepared based on the preset preparation concentration, and generates corresponding liquid preparation control instructions based on the target volume, the flow rate and pressure of the liquid output by the four-way valve;

[0092] In step S14, upon receiving the liquid preparation control instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid and / or water to be prepared into the calibration water tank, thereby obtaining a highly radioactive liquid with a preset preparation concentration.

[0093] In step S11 to step S14, details may refer to the relevant description in the above system embodiment, which will not be repeated here.

[0094] In some embodiments, step S13 further includes obtaining the liquid concentration and liquid level of the highly radioactive liquid in the calibration water tank; the remote monitoring device is further used to obtain the target volume of the highly radioactive liquid and / or water to be prepared based on the preset preparation concentration, liquid concentration and liquid level.

[0095] It should be noted that the above explanations of the embodiment of the automatic dispensing system for highly radioactive liquids are also applicable to the automatic dispensing method for highly radioactive liquids of this embodiment, and will not be elaborated here.

[0096] The serial numbers of the above-mentioned embodiments of the present disclosure are for description only and do not represent the advantages or disadvantages of the embodiments.

[0097] In the disclosed automatic dispensing method for highly radioactive liquid, a remote monitoring device first generates a cleaning instruction based on a dispensing requirement. Upon receiving the cleaning instruction, a control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, thereby cleaning the pipeline between the four-way valve and the three-way valve and delivering the cleaning waste liquid to the waste liquid tank. After the cleaning is completed, the remote monitoring device obtains a target volume of the highly radioactive liquid and / or water to be prepared based on a preset dispensing concentration, and generates a corresponding dispensing control instruction based on the target volume, the flow rate, and the pressure of the liquid output by the four-way valve. Upon receiving the dispensing control instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, thereby inputting the target volume of the highly radioactive liquid and / or water to be prepared into the calibration water tank, thereby obtaining a highly radioactive liquid having the preset dispensing concentration. In this case, before dispensing, a cleaning instruction is generated based on the dispensing requirements to clean the pipe between the four-way valve and the three-way valve. This prevents residual liquid on the pipe wall from affecting the concentration of the prepared liquid in the calibration water tank, thereby improving the dispensing accuracy of the highly radioactive liquid to a certain extent. In addition, the automatic dispensing of highly radioactive liquid with a preset concentration by combining a local dispensing device and a remote monitoring device is more efficient than existing manual dispensing methods. In summary, the method disclosed herein improves the dispensing accuracy and efficiency of highly radioactive liquids.

[0098] The accompanying drawings illustrate schematic diagrams of the structures of the disclosed embodiments of the present invention. These figures are not drawn to scale; for the purpose of clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0099] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This disclosure is not limited here.

[0100] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. An automatic dispensing system for highly radioactive liquids, characterized in that: It includes a local liquid dispensing device and a remote monitoring device, wherein the local liquid dispensing device includes a raw liquid tank, a clean water tank, a calibration water tank, a liquid dispensing injection pump, a four-way valve, a three-way valve, a liquid parameter monitoring module and a control module; the raw liquid tank and the clean water tank are connected to the liquid dispensing injection pump via the four-way valve, the liquid dispensing injection pump is connected to the calibration water tank via the three-way valve, and the three-way valve is also connected to the waste liquid tank, and the liquid parameter monitoring module is arranged on the pipeline between the four-way valve and the liquid dispensing injection pump; The raw liquid tank is used to store the highly radioactive liquid to be prepared; the clean water tank is used to store water; the liquid injection pump is used to deliver the liquid output by the four-way valve to the calibration water tank; The calibration water tank is used to receive the highly radioactive liquid to be prepared and / or the highly radioactive liquid prepared with water having a preset concentration; the liquid parameter monitoring module is used to collect the flow rate and pressure of the liquid output by the four-way valve and transmit them to the remote monitoring device; The remote monitoring device is used to first generate a cleaning instruction based on the liquid preparation requirement, then obtain a target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, and generate a corresponding liquid preparation control instruction based on the target volume, the flow rate, and the pressure; The control module is configured to, upon receiving the cleaning instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, so as to clean the pipeline between the four-way valve and the three-way valve and deliver the cleaning waste liquid to the waste liquid tank; and, upon receiving the liquid preparation control instruction, control the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid to be prepared and / or the water into the calibration water tank, thereby obtaining the highly radioactive liquid having the preset preparation concentration.

2. The automatic dispensing system for highly radioactive liquids according to claim 1, wherein: The local liquid dispensing device further includes a plurality of temperature control modules, each of which includes a temperature sensor, a temperature controller and a heater. The raw liquid tank and the calibration water tank are each equipped with a temperature control module.

3. The automatic dispensing system for highly radioactive liquids according to claim 2, wherein: The heater is a flat plate heater.

4. The automatic dispensing system for highly radioactive liquids according to claim 1, wherein: The calibration water tank includes a stirring motor and a stirring paddle.

5. The automatic dispensing system for highly radioactive liquids according to claim 1, wherein: The local liquid dispensing device also includes a decontamination module, which includes a decontamination tank, a spray module and a collection module. The decontamination tank is connected to the four-way valve. The decontamination tank is used to clean the pipeline between the four-way valve and the calibration water tank after the liquid dispensing is completed. The spray module is arranged in the calibration water tank. The spray module is used to clean the calibration water tank after the liquid dispensing is completed. The collection module is connected to the calibration water tank. The collection module is used to collect waste liquid after cleaning the calibration water tank.

6. The automatic dispensing system for highly radioactive liquids according to claim 1, wherein: The local liquid preparation device further includes a liquid concentration sensor and a liquid level switch arranged in the calibration water tank, wherein the liquid concentration sensor is used to detect the liquid concentration of the highly radioactive liquid in the calibration water tank; the liquid level switch is used to detect the liquid level of the highly radioactive liquid in the calibration water tank; and the remote monitoring device is further used to obtain a target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, the liquid concentration, and the liquid level.

7. The automatic dispensing system for highly radioactive liquids according to claim 1, wherein: The automatic liquid dispensing system for highly radioactive liquid further comprises a box body, the local liquid dispensing device is arranged in the box body, and a plurality of Forma wheels are arranged at the bottom of the box body.

8. The automatic dispensing system for highly radioactive liquids according to claim 7, wherein: The automatic dispensing system for highly radioactive liquids further comprises a radiation shield, which covers the box.

9. A method for automatically dispensing highly radioactive liquids based on the highly radioactive liquid automatic dispensing system according to any one of claims 1 to 8, characterized in that: include: The remote monitoring device first generates a cleaning instruction based on the liquid distribution requirements; When receiving the cleaning instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the waste liquid tank to be connected, so as to clean the pipeline between the four-way valve and the three-way valve and send the cleaning waste liquid to the waste liquid tank; After cleaning is completed, the remote monitoring device obtains the target volume of the highly radioactive liquid and / or water to be prepared based on the preset preparation concentration, and generates corresponding liquid preparation control instructions based on the target volume, the flow rate and pressure of the liquid output by the four-way valve; When receiving the liquid preparation control instruction, the control module controls the corresponding channel in the four-way valve and the channel between the three-way valve and the calibration water tank to be connected, so as to input the target volume of the highly radioactive liquid to be prepared and / or the water into the calibration water tank, thereby obtaining the highly radioactive liquid with the preset preparation concentration.

10. The automatic dispensing method for highly radioactive liquid according to claim 9, characterized in that: Also includes: Obtaining the liquid concentration and liquid level of the highly radioactive liquid in the calibration water tank; The remote monitoring device is further configured to obtain a target volume of the highly radioactive liquid to be prepared and / or the water based on a preset preparation concentration, the liquid concentration, and the liquid level.

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