Device for sampling tritium sample in water based on liquid flash measurement and analysis

Abstract

The invention relates to the technical field of ocean sampling, in particular to a device for sampling tritium samples in water based on liquid flash measurement analysis, which comprises a sampling barrel, a fixing groove is formed in the middle of the bottom of the sampling barrel, a plurality of floating bins are arranged on the outer wall of the sampling barrel, and driving ports and floating barrel mechanisms communicated with the fixing groove are arranged among the floating bins. The floating barrel mechanism is slidably connected into the floating bin and comprises a collecting barrel slidably connected with the inner wall of the floating bin, an inlet is formed in the top of the collecting barrel, a mounting shell is arranged at the position, close to the inlet, of the top of the collecting barrel, a movable block is slidably connected into the mounting shell, and a butt joint plate is arranged at the top of the movable block. A butt joint face and a first clamping block are arranged at the end, close to the fixing groove, of the butt joint plate. According to the invention, through cooperative work of the buoy mechanisms in the plurality of floating cabins, a large-volume seawater sample is collected at one time, so that the sampling operation is simplified, the workload and the time cost are reduced, and meanwhile, the accuracy of low-level tritium analysis is ensured.

Description

Technical Field

[0001] This invention relates to the field of marine sampling technology, and in particular to a water tritium sample sampling device based on liquid scintillation measurement and analysis. Background Technology

[0002] In the measurement of tritium content in seawater, the sampling process of water tritium sample collection devices based on liquid scintillation measurement and analysis is crucial. However, existing such devices have many shortcomings in sampling. In terms of sample processing capacity, some sampling devices have a limited capacity to process seawater at one time. For low-level tritium analysis, a larger volume of seawater sample is required to ensure accurate results, which necessitates multiple sampling and measurement, significantly increasing workload and time costs. In terms of seawater sampling at different depths, ordinary devices, without specialized design, struggle to directly acquire samples from various depths. They typically only sample from the surface or specific fixed locations, failing to meet diverse depth sampling needs. Most devices lack the ability to simultaneously collect samples from different depths. Achieving this requires complex designs, such as multiple sampling ports at different depths, valve control, and independent sample collection systems to prevent sample mixing; conventional devices lack such sophisticated designs. Regarding automation, most existing devices have low levels of automation. Even those with automated sampling devices often target specific locations or single depths. Automated sampling of seawater at different depths requires more complex control systems and mechanical structures, including automatically lowering and retrieving the sampling equipment at a set depth and accurately collecting samples—achievements currently difficult for most devices to accomplish. Summary of the Invention

[0003] This invention provides a water tritium sample collection device based on liquid scintillation measurement and analysis, to solve the problem mentioned in the background art that existing seawater tritium sample collection devices cannot sample seawater at different depths during the sampling process.

[0004] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a water tritium sample sampling device based on liquid scintillation measurement and analysis, including a sampling tube, a fixed groove is provided at the middle of the bottom of the sampling tube, a plurality of floating chambers are provided on the outer wall of the sampling tube, and a drive port connected to the fixed groove is provided between the floating chambers. A float mechanism is slidably connected inside the float tank. The float mechanism includes a collection bucket slidably connected to the inner wall of the float tank. An inlet is provided at the top of the collection bucket. An installation shell is provided at the top of the collection bucket near the inlet. A movable block is slidably connected inside the installation shell. A docking plate is provided at the top of the movable block. A docking surface and a locking block are provided at one end of the docking plate near the fixed groove. A control mechanism is installed in a fixed groove. The control mechanism includes a box body fixedly connected to the inner wall of the fixed groove. A rope-taking cavity is opened inside the box body. Drive cavities are opened on both sides of the rope-taking cavity inside the box body. A connecting pipe is provided on the top of the box body. A rope-taking shaft is rotatably connected inside the rope-taking cavity. A connecting gear is provided at one end of the rope-taking shaft. A gear plate rotatably connected to the box body is sleeved on the connecting pipe. The connecting gear is connected to the gear plate through a transmission component. A drive rod is fixedly connected to the top of the gear plate. The bottom of the drive rod is slidably connected to the pressure plate. A pressing surface and a second locking block are provided at one end of the drive rod.

[0005] The present invention is further configured such that a flipping assembly is provided on the outer wall of the housing near the drive port. The flipping assembly includes a fixing plate fixedly connected to the housing. One end of the fixing plate extends into the drive cavity and the other end extends into the drive port. A rotating shaft is rotatably connected between the fixing plates located inside the drive port. A plurality of card seats are fixedly connected to the outer circumference of the rotating shaft. A flip plate is hinged to the top of the card seats.

[0006] The present invention is further configured such that a drive groove is provided on the side of the fixed plate away from the rotation axis, a second transmission component is provided inside the drive groove, the end of the rotation axis passes through the drive groove and is connected to the second transmission component, a drive gear is rotatably connected to the outer wall of the fixed plate near the mating gear, and one side of the drive gear extends into the drive groove and is connected to the second transmission component.

[0007] The present invention is further configured such that a receiving port is provided at the top of the sampling cylinder, the floating chamber and the fixing groove are connected to the receiving port, a floating plate is slidably connected inside the receiving port, a rope is wound on the surface of the rope winding shaft, the rope is connected to the floating plate through a connecting pipe, and a drainage hole is provided at the bottom of the rope winding cavity.

[0008] The present invention is further configured such that a connecting block is provided on the outside of the sampling tube near the top, and a clamping plate is fixedly connected to the bottom of the inner side of the receiving port near the floating chamber, the clamping plate being used to prevent the sampling tube from detaching from the floating chamber.

[0009] The invention is further configured such that a support spring is provided at the bottom of the collection bucket, one end of which is connected to the float, and the support spring is used to reduce the falling speed of the collection bucket during the falling process.

[0010] The present invention is further configured such that one end of the movable block is connected to the mounting shell via a spring.

[0011] The beneficial effects of the water tritium sample collection device based on liquid scintillation measurement and analysis of the present invention are as follows: 1. The device is equipped with multiple floating chambers, each with a float mechanism. During low-level tritium analysis, multiple float mechanisms can collect seawater samples sequentially, eliminating the need for multiple complex sampling operations. For example, compared to existing devices that process a limited amount of seawater at a time, this device can obtain a larger volume of seawater sample at once through the coordinated work of multiple float mechanisms, significantly reducing workload and time costs, and ensuring the accuracy of measurement results. 2. The control mechanism and float mechanism of the device work together to effectively acquire seawater samples at different depths. As the device descends into the water, the rope is pulled, causing the rope-retracting shaft to rotate the docking gear. This, in turn, rotates the gear disc via the transmission assembly, moving the drive rod. When the squeezing surface of the drive rod contacts the docking surface, the movable block moves, exposing the inlet, and seawater enters the collection bucket. At this point, the device is confined to the current depth, achieving seawater sampling at that depth. As the collection bucket fills and descends, the device continues to fall, allowing sampling at the next depth. Multiple float mechanisms can sequentially collect seawater at different depths, meeting diverse depth sampling needs and solving the problem that ordinary devices can only sample from the sea surface or specific fixed locations. 3. The device is capable of automatically sampling seawater at different depths. Through the connection between the rope and the retrieval shaft, when the device descends, the buoyancy of the float pulls the rope, automatically rotating the retrieval shaft. This, in turn, drives a series of transmission components, such as the docking gear, transmission component one, gear disc, and drive rod, to work together to automatically open the inlet for seawater sampling at the corresponding depth. After sampling, it automatically continues to descend to the next depth for sampling. When the device is pulled up, seawater impacts the flap, causing the rotating shaft to rotate. Through transmission component two and the drive gear, the docking gear rotates, enabling the retrieval shaft to automatically reel in the rope. The entire process requires minimal manual intervention, greatly improving the device's automation level and meeting the needs for accurate, efficient, and convenient seawater tritium sampling in complex marine environments. Attached Figure Description

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the accompanying drawings. Please provide a detailed explanation.

[0013] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0014] Figure 1 This is a three-dimensional structural diagram of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention. Figure 2 This is a bottom view of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention. Figure 3 This is a cross-sectional view of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention. Figure 4 This is a separation diagram of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention; Figure 5 This is a diagram showing the separation of the float mechanism of a water tritium sample collection device based on liquid flashover measurement and analysis according to the present invention. Figure 6 This is an enlarged view of the control mechanism of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention; Figure 7 This is a cross-sectional view of the control mechanism of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention. Figure 8 This is a diagram showing the separation of the flipping component of a water tritium sample collection device based on liquid scintillation measurement and analysis according to the present invention.

[0015] The diagram is marked as follows: 1. Sampling tube; 11. Float; 12. Float mechanism; 121. Collection bucket; 122. Support spring; 123. Inlet; 124. Mounting shell; 125. Movable block; 126. Docking plate; 127. Docking surface; 1271. Locking block one; 128. Spring one; 13. Fixing slot; 14. Drive port; 15. Control mechanism; 151. Housing; 1511. Drain hole; 1512. Connecting pipe; 152. Rope winding chamber; 153. Rope winding shaft; 1531. Connecting gear; 154. Drive chamber; 155. Transmission assembly one; 156. Gear plate; 157. Drive rod; 1571. Extrusion surface; 1572. Locking block two; 158. Pressure plate; 159. Flipping assembly; 1591. Fixing plate; 15911. Drive slot; 1592. Rotating shaft; 1593. Locking seat; 1594. Flip plate; 1595. Transmission assembly two; 1596. Drive gear; 16. Locking plate; 17. Storage port; 18. Floating plate; 19. Connecting block. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two elements or the interaction between two elements.

[0018] Please see Figures 1-8 A water tritium sample sampling device based on liquid scintillation measurement and analysis includes a sampling tube 1, a fixed groove 13 is provided at the middle of the bottom of the sampling tube 1, a plurality of floating chambers 11 are provided on the outer wall of the sampling tube 1, and a drive port 14 connected to the fixed groove 13 is provided between the floating chambers 11. The float mechanism 12 is slidably connected inside the float tank 11. The float mechanism 12 includes a collection bucket 121 slidably connected to the inner wall of the float tank 11. The top of the collection bucket 121 has an inlet 123. The top of the collection bucket 121 is provided with a mounting shell 124 near the inlet 123. A movable block 125 is slidably connected inside the mounting shell 124. A docking plate 126 is provided on the top of the movable block 125. The docking plate 126 is provided with a docking surface 127 and a locking block 1271 at one end near the fixing groove 13. The control mechanism 15 is disposed in the fixed groove 13. The control mechanism 15 includes a box 151 fixedly connected to the inner wall of the fixed groove 13. A rope-taking cavity 152 is opened inside the box 151. Drive cavities 154 are opened on both sides of the rope-taking cavity 152 inside the box 151. A connecting pipe 1512 is provided on the top of the box 151. A rope-taking shaft 153 is rotatably connected inside the rope-taking cavity 152. A connecting gear 1531 is provided at one end of the rope-taking shaft 153. A gear plate 156 rotatably connected to the box 151 is sleeved on the connecting pipe 1512. The connecting gear 1531 is connected to the gear plate 156 through a transmission component 155. A drive rod 157 is fixedly connected to the top of the gear plate 156. The bottom of the drive rod 157 is slidably connected to the pressure plate 158. A pressing surface 1571 and a second clamping block 1572 are provided at one end of the drive rod 157.

[0019] By adopting the above technical solution, the design of the mounting shell 124 and movable block 125 on the top of the collection bucket 121 makes the switch control of the inlet 123 precise and stable. The movable block 125 is supported by spring 128 to ensure that it remains closed without external force. The components such as the housing 151, the rope winding cavity 152, and the drive cavity 154 in the control mechanism 15 are reasonably arranged, providing a stable space for the rope winding and unwinding, gear transmission, and movement of the drive rod 157. The flipping component 159 cooperates with the drive gear 1596 and other components through the transmission component 1595 to realize the clockwise rotation of the rotating shaft 1592, thereby driving the rope winding shaft 153 to rotate and wind up the rope.

[0020] A flipping assembly 159 is provided on the outer wall of the housing 151 near the drive port 14. The flipping assembly 159 includes a fixing plate 1591 fixedly connected to the housing 151. One end of the fixing plate 1591 extends into the drive cavity 154, and the other end extends into the drive port 14. A rotating shaft 1592 is rotatably connected between the fixing plates 1591 located inside the drive port 14. Several card holders 1593 are fixedly connected to the outer circumference of the rotating shaft 1592. A flip plate 1594 is hinged to the top of the card holders 1593. A drive groove 15911 is provided on the side of the fixed plate 1591 away from the rotating shaft 1592. A transmission component 1595 is provided inside the drive groove 15911. The end of the rotating shaft 1592 passes through the drive groove 15911 and is connected to the transmission component 1595. A drive gear 1596 is rotatably connected to the outer wall of the fixed plate 1591 near the mating gear 1531. One side of the drive gear 1596 extends into the drive groove 15911 and is connected to the transmission component 1595.

[0021] By adopting the above technical solution, when the device sinks to collect samples, the rotating shaft 1592 and the flap 1594 are flipped due to the resistance of the water, which does not affect the sampling process. When the device is pulled up by the connecting cable, the flap 1594 no longer flips due to the restriction of the bracket 1593. The seawater impacts the flap 1594, causing the rotating shaft 1592 to rotate clockwise. This rotational motion is transmitted to the docking gear 1531 through the transmission component 1595 and the drive gear 1596, which in turn drives the rope winding shaft 153 to rotate and wind up the rope, thus achieving the smooth recovery of the device.

[0022] The top of the sampling tube 1 has a receiving port 17. The float 11 and the fixing groove 13 are connected to the receiving port 17. A float plate 18 is slidably connected inside the receiving port 17. A rope is wound on the surface of the rope winding shaft 153. The rope is connected to the float plate 18 through the connecting pipe 1512. A drain hole 1511 is provided at the bottom of the rope winding cavity 152. A connecting block 19 is provided on the outside of the sampling tube 1 near the top. A clamping plate 16 is fixedly connected to the bottom of the inner side of the receiving port 17 near the float 11. The clamping plate 16 is used to prevent the sampling tube 121 from falling off the float 11.

[0023] By adopting the above technical solution, the connecting block 19 near the top of the sampling tube 1 is used to connect with the connecting cable, which facilitates the deployment and retrieval of the device, while the card plate 16 at the bottom of the inner side of the storage port 17 near the floating chamber 11 plays a fixing role to prevent the sampling tube 121 from falling off the floating chamber 11 during the sampling process.

[0024] A support spring 122 is provided at the bottom of the collection bucket 121, one end of which is connected to the float 11. The support spring 122 is used to reduce the falling speed of the collection bucket 121 during its descent. One end of the movable block 125 is connected to the mounting shell 124 through a spring 128.

[0025] By adopting the above technical solution, under normal circumstances, the movable block 125, under the elastic force of the spring 128, blocks the inlet 123 of the collection bucket 121 to prevent seawater from entering. When the device sinks to the set depth, the movable block 125 is pushed away by the control mechanism 15, opening the inlet 123 and allowing seawater to enter the collection bucket 121. After collection is completed, the spring 128 pushes the movable block 125 back to its original position, closing the inlet 123 to prevent sample overflow.

[0026] Working principle and usage process of this invention: In its normal state, the drive rod 157 is positioned above the drive port 14. A rope is wound around the surface of the rope take-up shaft 153, and the rope is connected to the float plate 18 via the connecting pipe 1512. The movable block 125 is normally positioned above the inlet 123. The collection bucket 121 is empty. When the device is not submerged in water, the support spring 122 is compressed by the weight of the collection bucket 121. When the collection bucket 121 enters seawater, buoyancy causes it to remain at the highest point of the float chamber 11. The locking plate 16 is used to prevent the collection bucket 121 from detaching from the float chamber 11.

[0027] In use, the sampling device is connected to the connecting cable via the connecting block 19. Then, the sampling device is slowly placed in seawater. When the sampling device is about to be completely submerged, the float 18 will float on the surface due to buoyancy. Because the bottom of the float 18 is connected to the rope, as the other components sink, the rope will be pulled, continuously pulling the rope outward from the rope-retracting chamber 152. Pulling the rope will simultaneously rotate the rope-retracting shaft 153. The rotation of the rope-retracting shaft 153 will drive the docking gear 1531 to rotate. The rotation of the docking gear 1531 will drive the gear disc 156 to rotate via the transmission assembly 155. As the gear disc 156 rotates, it will drive the drive rod 157 to move. The movement of the drive rod 157 will cause the pressing surface 1571 to move towards the docking surface 127. The rotation of the docking gear 1531 will also drive the drive gear 1596 to rotate. Figure 7 (For example) The rotation of the drive gear 1596 will drive the rotating shaft 1592 to rotate counterclockwise through the transmission component 1595. Since there is no restraint of the card holder 1593, the rotation of the rotating shaft 1592 will be affected by the resistance of the water, causing the rotating shaft 1592 to flip. Furthermore, the rotating shaft 1592 will also flip due to resistance during the fall of the device.

[0028] When the rope is pulled to a certain length, the docking surface 127 aligns with the pressing surface 1571. Pressing the pressing surface 1571 causes the docking plate 126 to move. The docking plate 126 then moves the movable block 125, exposing the inlet 123. After the docking plate 126 has moved a certain distance, the second locking block 1572 will engage with and lock together with the first locking block 1271. Because the drive rod 157 is locked, the rope-retracting shaft 153 will no longer rotate, and the rope cannot be pulled out further. This restricts the entire device to its current depth, preventing further movement. Seawater enters the collection tank 121 through the inlet 123. As the collection tank 121 gradually fills with seawater, it will... The device descends slowly. When the collection bucket 121 reaches a certain depth, the docking plate 126 separates from the drive rod 157. After the rope reel 153 is no longer restricted, the device continues to fall. The support spring 122 provides some support during the descent of the collection bucket 121 to reduce its descent speed. After the docking plate 126 separates from the drive rod 157, the spring 128 pushes the movable block 125 to reset and block the inlet 123. The float mechanism 12, which is full of samples, falls to the lowest point of the float chamber 11 and stops rising. When the device falls to a certain depth again, the drive rod 157 docks with the next float mechanism 12, and then the above steps are repeated.

[0029] Once all the float mechanisms 12 are full, the connecting block 19 is pulled by the connecting cable, thus slowly pulling the device out of the seawater. During the upward movement, the seawater will impact the flap 1594. At this time, the flap 1594 will not fold due to the restriction of the bracket 1593, which will drive the rotating shaft 1592 to rotate clockwise. The rotating shaft 1592 drives the docking gear 1531 to rotate through the transmission component 1595 and the drive gear 1596. The docking gear 1531 will drive the rope winding shaft 153 to rotate and wind up the rope. As the device moves upward and approaches the water surface, the float 18 will be pulled back into the storage port 17.

[0030] In summary, compared with the prior art, the embodiments of the present invention have the following advantages: Advantage 1: Sample processing capacity advantage. This invention is equipped with multiple floating chambers 11, each with a float mechanism 12. Compared with some existing devices that have a limited capacity to process seawater at one time, this device can collect seawater samples sequentially through multiple float mechanisms 12. For example, in low-level tritium analysis scenarios, it can obtain a large volume of seawater sample that meets the requirements for accurate measurement at one time without having to repeat the tedious sampling operation multiple times, which significantly reduces workload and time costs. Advantage 2: The device offers advantages in sampling seawater at different depths, with the control mechanism 15 and the float mechanism 12 working in tandem. When the device enters the water and sinks, the float 18 pulls the rope due to buoyancy, causing the rope-retracting shaft 153 to rotate. This rotates the docking gear 1531, which in turn causes the gear disc 156 to rotate via the transmission component 155. The drive rod 157 moves, and when the pressing surface 1571 of the drive rod 157 aligns with the docking surface 127, the movable block 125 moves, the inlet 123 opens, and seawater enters the collection bucket 121. The device samples at this fixed depth. After the collection bucket 121 is full and descends, the device continues to sink to sample seawater at the next depth. This process can be repeated multiple times, meeting diverse depth sampling needs and solving the problem that ordinary devices cannot directly obtain seawater samples from different depths. Thirdly, most existing devices struggle to collect seawater samples from different depths simultaneously during a single sampling process. However, this invention, through its unique design, allows multiple float mechanisms 12 to automatically collect seawater samples at different depths sequentially during the device's descent, avoiding sample mixing and eliminating the need for complex multi-depth sampling ports, valve controls, and independent sample collection systems. Fourthly, the device boasts a high degree of automation. It is capable of automatically descending and accurately collecting samples at different depths. Relying on the cooperation of the float 18, ropes, rope winding shaft 153, and a series of transmission components, the device automatically controls the operation of each component during the descent process, enabling seawater sampling at different depths without much human intervention. This changes the current situation where most existing devices have low levels of automation and can only sample water samples at specific locations or single depths. Fifthly, during the recovery process, seawater impacts the flapper 1594, causing the rotating shaft 1592 to rotate clockwise. Through the transmission component 1595 and the drive gear 1596, the docking gear 1531 rotates, causing the rope winding shaft 153 to automatically wind up the rope and pull the float 18 back into the storage port 17. The entire recovery process is highly automated, greatly improving the convenience of operation and adapting to the needs of seawater tritium sample collection in complex marine environments.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water tritium sample collection device based on liquid scintillation measurement and analysis, characterized in that, include: The sampling tube (1) has a fixed groove (13) at the middle of its bottom. The outer wall of the sampling tube (1) is provided with several floating chambers (11). A drive port (14) connected to the fixed groove (13) is provided between the floating chambers (11). A float mechanism (12) is slidably connected inside the float tank (11). The float mechanism (12) includes a collection bucket (121) slidably connected to the inner wall of the float tank (11). An inlet (123) is provided at the top of the collection bucket (121). An installation shell (124) is provided at the top of the collection bucket (121) near the inlet (123). A movable block (125) is slidably connected inside the installation shell (124). A docking plate (126) is provided at the top of the movable block (125). A docking surface (127) and a locking block (1271) are provided at one end of the docking plate (126) near the fixed groove (13). A control mechanism (15) is disposed in a fixed groove (13). The control mechanism (15) includes a housing (151) fixedly connected to the inner wall of the fixed groove (13). A rope-taking cavity (152) is provided inside the housing (151). A drive cavity (154) is provided on both sides of the rope-taking cavity (152) inside the housing (151). A connecting pipe (1512) is provided on the top of the housing (151). A rope-taking shaft (153) is rotatably connected inside the rope-taking cavity (152). One end of the tube is provided with a docking gear (1531), and the docking tube (1512) is covered with a gear disc (156) that is rotatably connected to the housing (151). The docking gear (1531) is connected to the gear disc (156) through a transmission assembly (155). The top of the gear disc (156) is fixedly connected with a drive rod (157). The bottom of the drive rod (157) is slidably connected to the pressure plate (158). One end of the drive rod (157) is provided with a pressing surface (1571) and a second clamping block (1572).

2. The water tritium sample collection device based on liquid scintillation measurement and analysis according to claim 1, characterized in that: A flipping assembly (159) is provided on the outer wall of the housing (151) near the drive port (14). The flipping assembly (159) includes a fixing plate (1591) fixedly connected to the housing (151). One end of the fixing plate (1591) extends into the drive cavity (154), and the other end extends into the drive port (14). A rotating shaft (1592) is rotatably connected between the fixing plates (1591) located inside the drive port (14). Several card seats (1593) are fixedly connected to the outer circumference of the rotating shaft (1592). A flip plate (1594) is hinged to the top of the card seat (1593).

3. The water tritium sample sampling device based on liquid scintillation measurement and analysis according to claim 2, characterized in that: A drive groove (15911) is provided on the side of the fixed plate (1591) away from the rotating shaft (1592). A transmission assembly (1595) is provided inside the drive groove (15911). The end of the rotating shaft (1592) extends into the drive groove (15911) and is connected to the transmission assembly (1595). A drive gear (1596) is rotatably connected to the outer wall of the fixed plate (1591) near the mating gear (1531). One side of the drive gear (1596) extends into the drive groove (15911) and is connected to the transmission assembly (1595).

4. The water tritium sample collection device based on liquid scintillation measurement and analysis according to claim 1, characterized in that: The sampling tube (1) has a receiving port (17) at the top. The floating chamber (11) and the fixed groove (13) are connected to the receiving port (17). A floating plate (18) is slidably connected inside the receiving port (17). A rope is wound on the surface of the rope winding shaft (153). The rope is connected to the floating plate (18) through the connecting pipe (1512). A drainage hole (1511) is provided at the bottom of the rope winding cavity (152).

5. A water tritium sample collection device based on liquid scintillation measurement and analysis according to claim 4, characterized in that: A connecting block (19) is provided on the outside of the sampling tube (1) near the top. A card plate (16) is fixedly connected to the bottom of the inner side of the receiving port (17) near the floating chamber (11). The card plate (16) is used to prevent the sampling tube (121) from falling off the floating chamber (11).

6. The water tritium sample collection device based on liquid scintillation measurement and analysis according to claim 1, characterized in that: The bottom of the collection bucket (121) is provided with a support spring (122) that is connected to the float (11) at one end. The support spring (122) is used to reduce the falling speed of the collection bucket (121) during the falling process.

7. A water tritium sample collection device based on liquid scintillation measurement and analysis according to claim 1, characterized in that: One end of the movable block (125) is connected to the mounting shell (124) via a spring (128).

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