Marine radionuclide detection equipment and method

Abstract

The invention discloses a marine radionuclide detection device and method, and relates to the technical field of radionuclide detection. According to the marine radionuclide detection equipment, in the detection process, a foreign matter in a seawater sample makes contact with a detection probe, so that a detection result has an error, meanwhile, under the introduction pressure, seawater and the foreign matter directly impact the detection probe, so that the detection probe is damaged, and according to the marine radionuclide detection equipment, a grating cylinder is matched with an outer cover disc, and grating grooves and holes of the grating cylinder are utilized; when seawater is guided in and out, the seawater can enter the inner part through the grating groove and the hole to contact with the detection probe, and meanwhile, particles in the detected seawater are blocked by utilizing a gap between the outer cover disc and the detection tank, so that a detection error value caused by the contact of foreign matters with the detection probe is avoided, and meanwhile, the seawater is blocked by the outer cover disc and the grating barrel, so that the detection error value is reduced. The detection probe is prevented from being damaged due to direct impact of seawater and foreign matters during introduction.

Description

Technical Field

[0001] The present invention relates to the technical field of radionuclide detection, and in particular to a device and method for detecting marine radionuclide. Background Art

[0002] Marine radionuclide detection is an important means of assessing the degree of radioactive contamination in the marine environment. Radionuclides in the ocean come from a wide range of sources, including natural radionuclides such as uranium, thorium, and radium isotopes, and artificial radionuclides such as tritium, cesium-137, strontium-90, and cobalt-60. Based on the physicochemical properties of the radionuclides, detection methods can be divided into radiochemical analysis and instrumental analysis. During the process of testing seawater, the collected seawater samples need to be introduced into the testing position for testing. However, during the testing process, foreign matter in the seawater sample contacts the detection probe, causing errors in the test results. At the same time, under the introduced pressure, the seawater and foreign matter directly impact the detection probe, causing damage to the detection probe. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: A marine radionuclide detection device, comprising: A frame, wherein a base and a waste liquid tank are fixedly mounted on the top of the frame, a seawater pump is fixedly mounted on the outside of the frame, a detection tank is fixedly mounted on the top of the base, a motor is fixedly mounted on the top of the detection tank, and an output end of the motor passes through the detection tank and extends into the interior thereof; An internal stirring mechanism, wherein the internal stirring mechanism is installed inside the detection tank, and the top of the internal stirring mechanism is fixedly connected to the output end of the motor; A filtering mechanism, wherein the filtering mechanism is fixedly connected to the water inlet of the seawater pump through a pipeline; A joint is fixedly installed at the bottom of the outer side of the detection tank, and the joint is fixedly connected to the water outlet of the seawater pump through a pipe. A detection probe is fixedly installed on the inner wall of the base. The detection end of the detection probe passes through the base and extends to the interior of the detection tank. A grille tube is fixedly installed on the bottom of the inner wall of the detection tank. Grille slots are evenly opened on the top of the outer side of the grille tube. The grille tube cooperates with the outer cover plate, and the grille slots and holes of the grille tube are used to ensure that when importing and exporting seawater, seawater can enter the interior through the grille slots and holes and contact the detection probe. At the same time, the gap between the outer cover plate and the detection tank is used. The outer cover plate is fixedly mounted on the outside of the grille tube, and the outer cover plate is located between the holes of the grille tube and the grille slots. The end of the outer cover plate away from the grille tube is tilted downward and there is a gap between the bottom of the inner wall of the detection tank and the outer cover plate.

[0004] Preferably, a top conduit and a bottom conduit are fixedly installed on one side of the detection tank close to the waste liquid tank, and the top conduit is located directly above the bottom conduit. The top conduit cooperates with the internal stirring mechanism to drive the seawater to move in the process of introducing seawater. At the same time, in the process of continuously introducing seawater, the first introduced seawater is led out of the detection tank by the top conduit, providing an introduction space for the remaining seawater samples, so that all seawater samples can be introduced into the detection tank, so that the samples can fully contact the detection probe for detection, thereby ensuring the accuracy of the detection. The end of the bottom conduit away from the detection tank is fixedly connected to the waste liquid tank, and the detection tank and the waste liquid tank are communicated through the bottom conduit. A slide groove is provided on the top of the bottom conduit, and a sealing block is slidably installed at the slide groove of the bottom conduit. The end of the top conduit away from the detection tank is located directly above the waste liquid tank.

[0005] Preferably, the internal stirring mechanism includes a top plate, the center position of the top of the top plate is fixedly connected to the output end of the motor, and the top plate is located directly above the grille tube, the bottom of the top plate is fixedly installed with a connecting plate, the bottom of the connecting plate is fixedly connected to a connecting ring, the bottom of the connecting ring is fixedly installed with a through-groove tube, the through-groove tube is located on the outside of the grille tube, and the outside of the through-groove tube is evenly provided with oblique through-grooves, the inner wall of the through-groove tube is fixedly installed with an inner guide plate, and the seawater introduced into the detection tank is driven by the inner guide plate and the inner stirring plate during rotation, so that the seawater introduced into the detection tank fully contacts the detection probe, so that the detection probe contacts the seawater in a flowing state during detection, thereby ensuring full contact between the seawater and the detection probe, and improving the accuracy of the detection result, and the end of the inner guide plate away from the through-groove tube contacts the outer side of the grille tube.

[0006] Preferably, the bottom of the through-groove cylinder does not contact the bottom of the inner wall of the detection tank, the inner guide plate is evenly installed along the center position of the through-groove cylinder, the inner wall of the through-groove cylinder is fixedly installed with an inner stirring plate, the inner stirring plate is located between the inner guide plates, and the outer side of the through-groove cylinder is fixedly installed with an outer scraper, and the outer scraper cooperates with the inclined guide plate. When cleaning the detection tank, the outer scraper scrapes the inner wall of the detection tank to clean attached foreign matter and drives water to impact the detection tank for cleaning. When scraping, the inclined guide plate drives water to impact the outer scraper The scraping position of the outer scraper assists the outer scraper in cleaning while washing away the foreign matter scraped out by the scraping position of the outer scraper, so that the foreign matter moves with the water flow, ensuring that it can be discharged with the water flow during discharge, thereby improving the cleaning effect. The end of the outer scraper away from the through-groove cylinder is in contact with the inner wall of the detection tank, and the outer scraper is evenly installed along the center position of the through-groove cylinder. An inclined guide plate is fixedly installed on the outside of the outer scraper, and the inclined guide plate is evenly installed from top to bottom on the outside of the outer scraper, and the end of the inclined guide plate close to the inner wall of the detection tank is inclined downward.

[0007] Preferably, the filtering mechanism includes an end head, one end of the end head is fixedly connected to the water inlet of the seawater pump through a pipe, and the other end of the end head is fixedly installed with an inner groove cylinder, the outer side of the inner groove cylinder is fixedly installed with an outer cover cylinder, there is a gap between the outer cover cylinder and the inner groove cylinder, and the outer side of the outer cover cylinder is evenly provided with holes and grooves, the end of the outer side of the inner groove cylinder away from the end head and the side away from the end head are both provided with water suction grooves, and the side of the inner groove cylinder away from the end head is fixedly installed with a grooved ring, the grooved ring cooperates with the inner groove cylinder, and when placed in a container for collecting seawater, there is a gap between the inner groove cylinder and the bottom of the container, ensuring that the seawater at the bottom of the container can be pumped during extraction, so that the collected samples can be driven by the seawater pump into the detection tank for detection, avoiding the samples at the bottom of the container from being unable to be introduced for detection, resulting in errors in the detection results, and the outer side of the grooved ring is evenly provided with grooves.

[0008] Preferably, an inner guide plate is fixedly mounted on the inner wall of the inner grooved cylinder, and the inner guide plate is evenly mounted axially inside the inner grooved cylinder, a conical cylinder is fixedly mounted on the side of the inner wall of the inner grooved cylinder close to the end head, the outer diameter of the conical cylinder gradually decreases as it moves away from the end head, through grooves are evenly opened on the outer side of the conical cylinder away from the end head, and a filter is fixedly mounted on the through grooves on the outer side of the conical cylinder, the end of the inner guide plate away from the inner grooved cylinder is inclined toward the end head, and there is a gap between the inner guide plate and the conical cylinder.

[0009] A detection method for marine radionuclide detection equipment comprises the following steps: S1. Sample collection: sampling the seawater at the detection location through seawater sampling equipment and storing and collecting the seawater in containers; S2. Equipment cleaning: The testing equipment is first cleaned by drawing clean water into the testing position, and the testing position is cleaned. The equipment is calibrated by detecting the radionuclides in the clean water. S3. Sample testing: After calibration and cleaning, the equipment extracts the collected seawater sample, places the seawater sample in the testing position, and uses the equipment to detect radionuclides in the seawater; S4. Equipment cleaning: After the test is completed, the seawater at the test location is drained out and clean water is drawn in again to flush the test location of the equipment.

[0010] The present invention provides a marine radionuclide detection device with the following beneficial effects: 1. This marine radionuclide detection equipment cooperates with the grille tube and the outer cover plate, and utilizes the grille slots and holes of the grille tube to ensure that when introducing and exporting seawater, seawater can enter the interior through the grille slots and holes and contact the detection probe. At the same time, the gap between the outer cover plate and the detection tank is used to block particulate matter in the detected seawater, preventing foreign matter from contacting the detection probe and causing error values in the detection. At the same time, the outer cover plate and the grille tube block the seawater, preventing seawater and foreign matter from directly impacting the detection probe when introduced, causing damage to the detection probe.

[0011] Second, the marine radionuclide detection equipment cooperates with the internal stirring mechanism through the top guide tube. During the process of introducing seawater, the internal stirring mechanism drives the movement of seawater. At the same time, during the process of continuously introducing seawater, the first introduced seawater is led out of the detection tank through the top guide tube, providing an introduction space for the remaining seawater samples, so that all seawater samples can be introduced into the detection tank, so that the samples can fully contact the detection probe for detection, thereby ensuring the accuracy of the detection.

[0012] 3. This marine radionuclide detection equipment drives the seawater introduced into the detection tank through the rotation of the inner guide plate and the inner stirring plate, so that the seawater introduced into the detection tank fully contacts the detection probe. During the detection, the detection probe contacts the flowing seawater, ensuring full contact between the seawater and the detection probe, thereby improving the accuracy of the detection results.

[0013] 4. This marine radionuclide detection equipment cooperates with an outer scraper and an inclined guide plate. When cleaning the detection tank, the outer scraper scrapes the inner wall of the detection tank to clean attached foreign matter, and at the same time drives water to impact the detection tank for cleaning. During scraping, the inclined guide plate drives water to impact the scraping position of the outer scraper, assisting the outer scraper in cleaning while flushing away foreign matter scraped out by the scraping position of the outer scraper, causing the foreign matter to move with the water flow, ensuring that it can be discharged with the water flow during discharge, thereby improving the cleaning effect.

[0014] 5. This marine radionuclide detection equipment cooperates with the inner grooved cylinder through the grooved ring. When placed in a container for collecting seawater, there is a gap between the inner grooved cylinder and the bottom of the container, ensuring that the seawater at the bottom of the container can be pumped during extraction, so that all collected samples can be driven by the seawater pump into the detection tank for detection, avoiding the situation where samples at the bottom of the container cannot be introduced for detection, resulting in errors in the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a marine radionuclide detection device according to the present invention; Figure 2 This is a structural side view of a marine radionuclide detection device according to the present invention; Figure 3 This is a partial structural anatomical diagram of a marine radionuclide detection device according to the present invention; Figure 4 This is a partial structural dissected side view of a marine radionuclide detection device according to the present invention; Figure 5 This is a partial internal structural schematic diagram of a marine radionuclide detection device according to the present invention; Figure 6 Schematic diagram of the structure of the internal stirring mechanism of the present invention; Figure 7 It is a partial structural schematic diagram of the internal stirring mechanism of the present invention; Figure 8 This is a schematic diagram of the position structure of the filtering mechanism and the seawater pump of the present invention; Figure 9 It is a structural schematic diagram of the filtering mechanism of the present invention; Figure 10 It is a structural dissection diagram of the filtering mechanism of the present invention; Figure 11 It is a partial structural anatomical diagram of the filtering mechanism of the present invention; Figure 12 Schematic diagram of the detection method of the present invention.

[0016] In the figure: 1. frame; 2. internal stirring mechanism; 3. filtering mechanism; 4. detection tank; 5. motor; 6. waste liquid tank; 7. seawater pump; 8. base; 9. joint; 10. bottom conduit; 11. top conduit; 12. outer cover plate; 13. grille tube; 14. sealing block; 15. detection probe; 21. top plate; 22. connecting plate; 23. through-grooved tube; 24. outer scraper; 25. inclined guide plate; 26. connecting ring; 27. inner guide plate; 28. inner stirring plate; 31. inner grooved tube; 32. outer cover tube; 33. missing groove ring; 34. tapered tube; 35. inner guide plate; 36. filter screen; 37. end. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution: A marine radionuclide detection device, comprising: The frame 1 has a base 8 and a waste liquid tank 6 fixedly mounted on the top of the frame 1, and a seawater pump 7 fixedly mounted on the outside of the frame 1. A detection tank 4 is fixedly mounted on the top of the base 8, and a motor 5 is fixedly mounted on the top of the detection tank 4. The output end of the motor 5 passes through the detection tank 4 and extends into the interior thereof; The internal stirring mechanism 2 is installed inside the detection tank 4, and the top of the internal stirring mechanism 2 is fixedly connected to the output end of the motor 5; The filter mechanism 3 is fixedly connected to the water inlet of the seawater pump 7 through a pipeline; A joint 9 is fixedly installed at the bottom of the outer side of the detection tank 4, and the joint 9 is fixedly connected to the water outlet of the seawater pump 7 through a pipe. A detection probe 15 is fixedly installed on the inner wall of the base 8. The detection end of the detection probe 15 passes through the base 8 and extends to the interior of the detection tank 4. During detection, the seawater sample is continuously introduced into the detection tank 4 by the seawater pump 7, so that the liquid level inside the detection tank 4 gradually rises until it is discharged from the top conduit 11 position and introduced into the waste liquid tank 6. The internal stirring mechanism 2 stirs the seawater driven by the motor 5 to ensure the flow of seawater during detection by the detection probe 15. When the detection is completed, the sealing block 14 is opened to make the top conduit 11 cooperate with the bottom conduit 10 to introduce seawater into the waste liquid tank 6. By collecting the waste liquid in the waste liquid tank 6, the waste liquid in the detection tank 4 is discharged. A grille tube 13 is fixedly installed at the bottom of the inner wall of the detection tank 4. The top of the outer side of the grille tube 13 is evenly provided with grille slots, and the bottom of the outer side of the grille tube 13 is evenly provided with grille slots. There are holes, and the detection end of the detection probe 15 is located inside the grille tube 13. The outer side of the grille tube 13 is fixedly installed with an outer cover plate 12. During the detection process, the seawater pump 7 drives the seawater from the joint 9 into the detection tank 4 through the pipeline. At the same time, the grille tube 13 cooperates with the outer cover plate 12, so that the seawater can be introduced into the grille groove and the hole into the interior of the grille tube 13, so that the detection probe 15 contacts the seawater to be detected. At the same time, the gap between the outer cover plate 12 and the detection tank 4 is used to block the particles in the seawater. At the same time, with the impact of the seawater during introduction, the arc shape of the outer cover plate 12 is used to guide the particles to avoid particles blocking the gap between the outer cover plate 12 and the detection tank 4, ensuring that the seawater passes through the gap and is guided into the interior through the holes of the grille tube 13. The outer cover plate 12 is located between the holes and the grille slots of the grille tube 13. The end of the outer cover plate 12 away from the grille tube 13 is tilted downward and there is a gap with the bottom of the inner wall of the detection tank 4.

[0019] A top conduit 11 and a bottom conduit 10 are fixedly installed on one side of the detection tank 4 close to the waste liquid tank 6. The top conduit 11 is located directly above the bottom conduit 10. The end of the bottom conduit 10 away from the detection tank 4 is fixedly connected to the waste liquid tank 6. The detection tank 4 and the waste liquid tank 6 are connected through the bottom conduit 10. A slide groove is provided on the top of the bottom conduit 10. A sealing block 14 is slidably installed at the slide groove of the bottom conduit 10. The end of the top conduit 11 away from the detection tank 4 is located directly above the waste liquid tank 6.

[0020] The second embodiment, based on the first embodiment, see Figures 6 and 7As shown, the internal stirring mechanism 2 includes a top plate 21, the center position of the top of the top plate 21 is fixedly connected to the output end of the motor 5, and the top plate 21 is located just above the grille tube 13, and a connecting plate 22 is fixedly installed at the bottom of the top plate 21, and a connecting ring 26 is fixedly connected to the bottom of the connecting plate 22. During detection, the motor 5 drives the top plate 21 to rotate, so that the top plate 21 drives the through-groove tube 23 to rotate through the connecting plate 22 and the connecting ring 26, so that the through-groove tube 23 drives the inner guide plate 27 and the inner stirring plate 28 to rotate along the center position of the axis of the detection tank 4, driving the seawater to move on the outside of the grille tube 13, so that when the detection probe 15 detects the seawater, the seawater is in a flowing state, and a through-groove tube 23 is fixedly installed at the bottom of the connecting ring 26. The through-groove tube 23 is located on the outside of the grille tube 13, and oblique through-grooves are evenly opened on the outside of the through-groove tube 23. The inner wall of the through-groove tube 23 is fixedly mounted with an inner guide plate 27, and the end of the inner guide plate 27 away from the through-groove tube 23 contacts the outside of the grille tube 13.

[0021] The bottom of the through-groove cylinder 23 does not contact the bottom of the inner wall of the detection tank 4, the inner guide plate 27 is evenly installed along the center position of the through-groove cylinder 23, the inner wall of the through-groove cylinder 23 is fixedly installed with an inner stirring plate 28, the inner stirring plate 28 is located between the inner guide plates 27, the outer side of the through-groove cylinder 23 is fixedly installed with an outer scraper 24, the end of the outer scraper 24 away from the through-groove cylinder 23 is in contact with the inner wall of the detection tank 4, and the outer scraper 24 is evenly installed along the center position of the through-groove cylinder 23, and the outer side of the outer scraper 24 is fixedly installed with an inclined guide plate 25. When cleaning, the rotating through-groove cylinder 23 drives the inner guide plate 27 and the outer scraper 24 to move, so that the inner guide plate 27 scrapes the grille cylinder 13, and the outer The scraper 24 scrapes the inner wall of the detection tank 4 to clean the detection position. At the same time, when the outer scraper 24 scrapes the impurities attached to the inner wall of the detection tank 4, the water introduced into the detection tank 4 is guided by the inclined guide plate 25 during the rotation, so that the inclined guide plate 25 will impact the water inside obliquely downward and outward during the rotation of the outer scraper 24, assisting the scraping of the outer scraper 24, cleaning the inner wall of the detection tank 4, and impacting the scraping position of the outer scraper 24 to avoid the scraped impurities from accumulating at the scraping position. The inclined guide plate 25 is evenly installed on the outside of the outer scraper 24 from top to bottom, and the end of the inclined guide plate 25 close to the inner wall of the detection tank 4 is tilted downward.

[0022] The third embodiment, based on the first and second embodiments, see Figures 8 to 12As shown, the filtering mechanism 3 includes an end 37, one end of the end 37 is fixedly connected to the water inlet of the seawater pump 7 through a pipe, and the other end of the end 37 is fixedly installed with an inner groove cylinder 31, and an outer cover cylinder 32 is fixedly installed on the outside of the inner groove cylinder 31. There is a gap between the outer cover cylinder 32 and the inner groove cylinder 31, and the outer side of the outer cover cylinder 32 is evenly opened with holes and grooves. When a container for collecting seawater is placed in the filtering mechanism 3, the grooved ring 33 contacts the bottom of the container, and cooperates with the water suction groove of the inner groove cylinder 31, so that when the seawater pump 7 pumps seawater, the seawater in the container At this time, water is smoothly introduced into the water suction groove of the inner groove cylinder 31. At the same time, during the introduction process, the inner groove cylinder 31 first cooperates with the outer cover cylinder 32, and uses the empty groove of the outer cover cylinder 32 and the water suction groove of the inner groove cylinder 31 to preliminarily filter the seawater to remove large foreign matter. Then the seawater enters the interior of the inner groove cylinder 31. Water suction grooves are provided on the end of the outer side of the inner groove cylinder 31 away from the end head 37 and on the side away from the end head 37. A grooved ring 33 is fixedly installed on the side of the inner groove cylinder 31 away from the end head 37, and the outer side of the grooved ring 33 is evenly provided with grooves.

[0023] The inner wall of the inner groove cylinder 31 is fixedly mounted with an inner guide disc 35, and the inner guide disc 35 is evenly mounted axially inside the inner groove cylinder 31. A tapered cylinder 34 is fixedly mounted on one side of the inner wall of the inner groove cylinder 31 near the end head 37. The outer diameter of the tapered cylinder 34 gradually decreases as it moves away from the end head 37. A through groove is evenly opened on the end of the outer side of the tapered cylinder 34 away from the end head 37. The suction force of the seawater pump 7 causes the seawater to move toward the tapered cylinder 34 under the guidance of the inner guide disc 35. The through groove of the tapered cylinder 34 cooperates with the filter screen 36 to filter the seawater again. The seawater after the two filtrations is guided by the inner guide end head 37 of the tapered cylinder 34 and introduced into the detection tank 4 along the pipeline through the seawater pump 7. A filter screen 36 is fixedly mounted on the through groove on the outer side of the tapered cylinder 34. The end of the inner guide disc 35 away from the inner groove cylinder 31 is inclined toward the end head 37, and there is a gap between the inner guide disc 35 and the tapered cylinder 34.

[0024] A detection method for marine radionuclide detection equipment comprises the following steps: S1. Sample collection: sampling the seawater at the detection location through seawater sampling equipment and storing and collecting the seawater in containers; S2. Equipment cleaning: The testing equipment is first cleaned by drawing clean water into the testing position, and the testing position is cleaned. The equipment is calibrated by detecting the radionuclides in the clean water. S3. Sample testing: After calibration and cleaning, the equipment extracts the collected seawater sample, places the seawater sample in the testing position, and uses the equipment to detect radionuclides in the seawater; S4. Equipment cleaning: After the test is completed, the seawater at the test location is drained out and clean water is drawn in again to flush the test location of the equipment.

[0025] During use, the filter mechanism 3 is first placed in clean water, the motor 5 and the seawater pump 7 are started, and the seawater pump 7 draws clean water through the filter mechanism 3 and introduces it into the detection tank 4. The detection tank 4 is cleaned, and the equipment is calibrated by testing the clean water. After the cleaning and calibration are completed, the water is discharged, and then the filter mechanism 3 is placed in a container that collects seawater samples, and the seawater pump 7 draws seawater samples, and large foreign matter in the seawater samples is filtered through the filter mechanism 3, and the samples are introduced into the detection tank 4. The radioactive nuclides in the seawater are detected by the detection probe 15, and the motor 5 drives the internal stirring mechanism 2 to move inside the detection tank 4, driving the seawater to rotate in the detection tank 4.

[0026] During the test, the seawater sample is continuously introduced into the test tank 4 through the seawater pump 7, so that the liquid level inside the test tank 4 gradually rises until it is discharged from the top conduit 11 and introduced into the waste liquid tank 6. The internal stirring mechanism 2 is driven by the motor 5 to stir the seawater, so that the flow of seawater is guaranteed when the detection probe 15 is testing. When the test is completed, the sealing block 14 is opened, and the top conduit 11 is matched with the bottom conduit 10 to introduce the seawater into the waste liquid tank 6. The waste liquid in the waste liquid tank 6 is collected and discharged from the test tank 4. At the same time, during the test process, the seawater pump is used through the pipeline. 7 drives the seawater to be introduced into the detection tank 4 through the joint 9. At the same time, the grille tube 13 cooperates with the outer cover plate 12 so that the seawater can be introduced into the interior of the grille tube 13 through the grille groove and the hole, so that the detection probe 15 contacts the seawater to be detected. At the same time, the gap between the outer cover plate 12 and the detection tank 4 is used to block the particles in the seawater. At the same time, the arc shape of the outer cover plate 12 is used to guide the particles in conjunction with the impact of the seawater during the introduction, so as to prevent the particles from clogging the gap between the outer cover plate 12 and the detection tank 4, and ensure that the seawater passes through the gap and is guided into the interior through the holes of the grille tube 13.

[0027] During detection, the motor 5 drives the top plate 21 to rotate, so that the top plate 21 drives the grooved cylinder 23 to rotate through the connecting plate 22 and the connecting ring 26, so that the grooved cylinder 23 drives the inner guide plate 27 and the inner stirring plate 28 to rotate along the axis center position of the detection tank 4, and drives the seawater to move on the outside of the grid cylinder 13, so that when the detection probe 15 detects the seawater, the seawater is in a flowing state. During cleaning, the rotating grooved cylinder 23 drives the inner guide plate 27 and the outer scraper 24 to move, so that the inner guide plate 27 scrapes the grid cylinder 13 and the outer scraper 24 The plate 24 scrapes the inner wall of the detection tank 4 to clean the detection position. At the same time, when the outer scraper 24 scrapes the impurities attached to the inner wall of the detection tank 4, the water introduced into the detection tank 4 is guided by the inclined guide plate 25 during the rotation process, so that the inclined guide plate 25 will impact the water inside obliquely downward and outward during the rotation of the outer scraper 24, assisting the scraping of the outer scraper 24, cleaning the inner wall of the detection tank 4, and impacting the scraping position of the outer scraper 24 to avoid the scraped impurities from accumulating at the scraping position.

[0028] When a container for collecting seawater is placed in the filtering mechanism 3, the grooved ring 33 contacts the bottom of the container and cooperates with the water suction groove of the inner grooved cylinder 31. When the seawater pump 7 pumps seawater, the seawater in the container is smoothly introduced into the water suction groove of the inner grooved cylinder 31 at this time. At the same time, during the introduction process, the seawater is first preliminarily filtered by the inner grooved cylinder 31 and the outer cover cylinder 32, using the empty groove of the outer cover cylinder 32 and the water suction groove of the inner grooved cylinder 31 to remove large foreign matter. Then the seawater enters the interior of the inner grooved cylinder 31. After entering the interior, the seawater is guided by the inner guide plate 35 by the suction force of the seawater pump 7, and moves toward the conical cylinder 34. The seawater is filtered again by the through groove of the conical cylinder 34 and the filter screen 36. The seawater after being filtered twice is introduced into the detection tank 4 along the pipeline through the seawater pump 7 from the position of the internal guide end 37 of the conical cylinder 34.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A marine radionuclide detection device, characterized in that: include: A frame (1), a base (8) and a waste liquid tank (6) are fixedly mounted on the top of the frame (1), a seawater pump (7) is fixedly mounted on the outside of the frame (1), a detection tank (4) is fixedly mounted on the top of the base (8), a motor (5) is fixedly mounted on the top of the detection tank (4), and an output end of the motor (5) passes through the detection tank (4) and extends into the interior thereof; An internal stirring mechanism (2), the internal stirring mechanism (2) is installed inside the detection tank (4), and the top of the internal stirring mechanism (2) is fixedly connected to the output end of the motor (5); A filtering mechanism (3), the filtering mechanism (3) being fixedly connected to the water inlet of the seawater pump (7) via a pipeline; A joint (9) is fixedly installed on the bottom of the outer side of the detection tank (4), and the joint (9) is fixedly connected to the water outlet of the seawater pump (7) through a pipeline. A detection probe (15) is fixedly installed on the inner wall of the base (8), and the detection end of the detection probe (15) passes through the base (8) and extends to the interior of the detection tank (4). A grille tube (13) is fixedly installed on the bottom of the inner wall of the detection tank (4), and grille grooves are evenly opened on the top of the outer side of the grille tube (13), and holes are evenly opened on the bottom of the outer side of the grille tube (13). The detection end of the detection probe (15) is located inside the grille tube (13). An outer cover plate (12) is fixedly installed on the outer side of the grille tube (13), and the outer cover plate (12) is located between the holes and the grille grooves of the grille tube (13). The end of the outer cover plate (12) away from the grille tube (13) is tilted downward and has a gap with the bottom of the inner wall of the detection tank (4).

2. The marine radionuclide detection device according to claim 1, characterized in that: A top conduit (11) and a bottom conduit (10) are fixedly installed on one side of the detection tank (4) close to the waste liquid tank (6), the top conduit (11) is located directly above the bottom conduit (10), and the end of the bottom conduit (10) away from the detection tank (4) is fixedly connected to the waste liquid tank (6), the detection tank (4) and the waste liquid tank (6) are communicated through the bottom conduit (10), a chute is provided on the top of the bottom conduit (10), a sealing block (14) is slidably installed on the chute of the bottom conduit (10), and the end of the top conduit (11) away from the detection tank (4) is located directly above the waste liquid tank (6).

3. The marine radionuclide detection device according to claim 1, characterized in that: The internal stirring mechanism (2) comprises a top plate (21), the center position of the top of the top plate (21) is fixedly connected to the output end of the motor (5), and the top plate (21) is located directly above the grille cylinder (13). A connecting plate (22) is fixedly mounted on the bottom of the top plate (21), and a connecting ring (26) is fixedly connected to the bottom of the connecting plate (22).

4. The marine radionuclide detection device according to claim 3, characterized in that: A through-groove cylinder (23) is fixedly mounted on the bottom of the connecting ring (26), the through-groove cylinder (23) is located outside the grille cylinder (13), and oblique through-grooves are evenly formed on the outside of the through-groove cylinder (23). An inner guide plate (27) is fixedly mounted on the inner wall of the through-groove cylinder (23), and one end of the inner guide plate (27) away from the through-groove cylinder (23) contacts the outside of the grille cylinder (13).

5. The marine radionuclide detection device according to claim 4, characterized in that: The bottom of the through-groove cylinder (23) does not contact the bottom of the inner wall of the detection tank (4); the inner guide plates (27) are evenly installed along the center of the through-groove cylinder (23); and inner stirring plates (28) are fixedly installed on the inner wall of the through-groove cylinder (23); the inner stirring plates (28) are located between the inner guide plates (27).

6. The marine radionuclide detection device according to claim 5, characterized in that: An outer scraper (24) is fixedly mounted on the outer side of the through-groove cylinder (23), and one end of the outer scraper (24) away from the through-groove cylinder (23) contacts the inner wall of the detection tank (4), and the outer scraper (24) is evenly mounted along the center of the through-groove cylinder (23). An inclined guide plate (25) is fixedly mounted on the outer side of the outer scraper (24), and the inclined guide plate (25) is evenly mounted from top to bottom on the outer side of the outer scraper (24), and one end of the inclined guide plate (25) close to the inner wall of the detection tank (4) is tilted downward.

7. The marine radionuclide detection device according to claim 1, characterized in that: The filtering mechanism (3) comprises an end head (37), one end of the end head (37) is fixedly connected to the water inlet of the seawater pump (7) via a pipeline, and the other end of the end head (37) is fixedly mounted with an inner grooved cylinder (31), and an outer cover cylinder (32) is fixedly mounted on the outer side of the inner grooved cylinder (31).

8. The marine radionuclide detection device according to claim 7, characterized in that: There is a gap between the outer cover tube (32) and the inner groove tube (31), and the outer side of the outer cover tube (32) is uniformly provided with holes and grooves. The outer side of the inner groove tube (31) is provided with water absorption grooves at one end away from the end head (37) and one side away from the end head (37). A grooved ring (33) is fixedly mounted on the side of the inner groove tube (31) away from the end head (37), and the outer side of the grooved ring (33) is uniformly provided with grooves.

9. The marine radionuclide detection device according to claim 8, characterized in that: An inner guide disc (35) is fixedly mounted on the inner wall of the inner grooved cylinder (31), and the inner guide disc (35) is evenly mounted in the axial direction inside the inner grooved cylinder (31). A conical cylinder (34) is fixedly mounted on the inner wall of the inner grooved cylinder (31) on the side close to the end head (37). The outer diameter of the conical cylinder (34) gradually decreases as it moves away from the end head (37). Through grooves are evenly formed on the outer side of the conical cylinder (34) away from the end head (37), and a filter screen (36) is fixedly mounted on the through groove on the outer side of the conical cylinder (34). The end of the inner guide disc (35) away from the inner grooved cylinder (31) is inclined toward the end head (37), and a gap is present between the inner guide disc (35) and the conical cylinder (34).

10. A detection method for a marine radionuclide detection device according to any one of claims 1 to 9, characterized in that: It consists of the following steps: S1. Sample collection: sampling the seawater at the detection location through seawater sampling equipment and storing and collecting the seawater in containers; S2. Equipment cleaning: The testing equipment is first cleaned by drawing clean water into the testing position, and the testing position is cleaned. The equipment is calibrated by detecting the radionuclides in the clean water. S3. Sample testing: After calibration and cleaning, the equipment extracts the collected seawater sample, places the seawater sample in the testing position, and uses the equipment to detect radionuclides in the seawater; S4. Equipment cleaning: After the test is completed, the seawater at the test location is drained out and clean water is drawn in again to flush the test location of the equipment.

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