A device and method for preparing dry samples of marine organisms for gamma spectroscopy analysis
Patent Information
- Application Number
- CN202611227650.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-13
- Publication Date
- 2026-11-03
AI Technical Summary
Existing marine organism dry sample preparation equipment is prone to sample loss, powder wear, and clogging during the drying process, and lacks precise temperature and humidity control, making it difficult to meet the requirements of high-precision and high-throughput radionuclide monitoring.
A device comprising a drying drum, a pulse backflushing mechanism, an airflow separation mechanism, and a knocking filter mechanism was designed. It utilizes mechanical power to generate pulse backflushing airflow, rotating blade separation, and gravity knocking filtration to achieve efficient powder collection and anti-sticking. Combined with a temperature controller, it ensures precise temperature control.
It achieves efficient pulverization, anti-adhesion collection, and precise temperature control of marine organism dry samples, improving sample collection rate and equipment lifespan, and meeting the needs of high-precision nuclide monitoring.
Smart Images
Figure CN123028873A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nuclear radiation measurement and environmental monitoring, specifically to a device and method for preparing dried marine organism samples for gamma-ray spectroscopy analysis. Background Technology
[0002] Radionuclide monitoring is a crucial part of marine ecological environment assessment. Gamma-ray spectroscopy (GRS) is a standard method for accurately measuring the radioactivity levels of various sample media. It can be used for monitoring fresh, dried, and ash samples. When the gamma-ray nuclide levels in marine biological samples are too weak to be directly measured, concentration methods such as drying and evaporation should be considered, until the samples are dried, ashed, or concentrated using simple chemical methods. Therefore, the preparation of dried marine biological samples is a fundamental prerequisite for GRS analysis. The samples to be tested must be thoroughly dehydrated and prepared into a uniform dry powder state. The purity and quality of the final dry powder directly affect the accuracy and reliability of nuclide activity determination.
[0003] Currently, the preparation of dried marine organism samples requires five pretreatment steps: washing, air drying, extracting edible portions, drying, and pulverizing before loading. Drying and sieving are key steps in the preparation process. Traditional drying methods mainly use static drying or single hot air drying, while sieving is mainly done manually. Marine fish and other biological samples contain components such as proteins and oils, which are prone to caking and stickiness during the drying process, resulting in a decrease in drying efficiency. The subsequent pulverizing and homogenizing process results in significant sample loss. In practice, the preparation of dried samples often requires repeated pulverizing and drying operations, which is time-consuming and labor-intensive.
[0004] Furthermore, existing marine dried sample preparation equipment lacks precise temperature and humidity monitoring and programmed temperature control functions. Local drying temperatures are often uncontrollable or too high, which can easily damage the stability of volatile nuclides. Currently, there is a lack of complete sets of marine dried sample preparation devices and methods, which cannot simultaneously achieve efficient crushing and stripping, precise temperature control, and anti-adhesion collection, making it difficult to meet the high precision and high throughput requirements of modern marine radionuclide monitoring. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a marine organism dry sample preparation device and method for gamma-ray spectrometry analysis, which solves the technical problems of sample loss caused by powder adhesion due to heat, micro-powder abrasion of the fan, and blockage in the sieving stage in existing marine organism dry sample preparation equipment.
[0006] To achieve the above objectives, the present invention provides the following technical solution: The first aspect of the present invention provides a marine organism dry sample preparation device for gamma-ray spectroscopy analysis, comprising a base and a drying drum. A first support and a second support are fixedly connected to the top of the base. The drying drum is disposed between the first support and the second support. A main motor is disposed on the outside of the base. A collection bin is disposed on the outside of the second support. A negative pressure fan is fixedly connected to the outside of the base. A pulse backflushing mechanism is disposed on the outside of the drying drum. An airflow separation mechanism is disposed inside the collection bin. A knocking filter mechanism is disposed inside the collection bin. The pulse backflushing mechanism includes a positive pressure fan, which is fixedly connected to the outside of the base. An air inlet pipe is fixedly connected to the output end of the positive pressure fan, and the other end of the air inlet pipe is connected to a valve body. The valve body is fixedly connected to the top of the second bracket. A valve stem is slidably connected to the inside of the valve body, and a roller is fixedly connected to the outside of the valve stem. A circular track is fixedly connected to the outside of the drying drum, and a stop block is fixedly connected to the inside of the circular track. A through hole is opened inside the valve stem.
[0007] Preferably, the airflow separation mechanism includes a housing, which is fixedly connected to the outside of the collection bin. A central shaft is rotatably connected inside the housing, and multiple rotating blades are fixedly connected to the outside of the central shaft. Multiple comb-tooth baffles are fixedly connected to the end of the central shaft away from the rotating blades.
[0008] Preferably, the striking filter mechanism includes a large gear ring for force take-off, which is fixedly connected to the outside of the drying drum. A small gear is provided on the outside of the drying drum. The large gear ring and the small gear mesh with each other. A drive shaft is fixedly connected to the outside of the small gear. A notched cam is fixedly connected to the end of the drive shaft away from the small gear. A lifting lever is rotatably connected inside the collection bin. A lever wheel is fixedly connected to the outside of the lifting lever. A gravity hammer is fixedly connected to the end of the lifting lever away from the lever wheel. A filter plate is fixedly connected inside the collection bin.
[0009] Preferably, a main drive pinion is fixedly connected to the output end of the main motor, and a main drive large gear is fixedly connected to the outer side of the drying drum, wherein the main drive pinion and the main drive large gear mesh with each other.
[0010] Preferably, when the impact block rotates with the circular track, it contacts the roller and pushes up the valve stem, and the through hole is connected to the air intake pipe and the internal air passage of the valve body as the valve stem rises.
[0011] Preferably, the input end of the negative pressure fan is connected to a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is fixedly connected to an anti-clogging filter.
[0012] Preferably, the rotating blades are positioned in the flow path of the negative pressure fan drawing air, and the comb-tooth baffle is positioned inside the collection bin.
[0013] Preferably, temperature sensors are provided on the outer sides of both the first bracket and the second bracket, and a temperature controller is fixedly connected to the outer side of the base.
[0014] Preferably, the notched cam is crescent-shaped, and when it rotates to the notched position, the gravity hammer falls and strikes the filter plate.
[0015] A second aspect of the present invention provides a method for preparing dried marine organism samples for gamma-ray spectroscopy analysis, using the aforementioned apparatus for preparing dried marine organism samples for gamma-ray spectroscopy analysis, comprising the following steps: S1, start the main motor. The main motor drives the drying drum to start rotating through the main drive pinion and the main drive ring gear. At the same time, start the positive pressure fan and the negative pressure fan. Then, put the marine organisms to be processed into the drying drum for heating, drying and crushing. During the heating and drying process, the drying temperature is set by the temperature controller and the temperature sensor. S2, during the rotation and heating process of the drying drum, the circular track fixed on the outside of the drum and the impact block on it rotate synchronously; the impact block periodically pushes up the roller at the bottom of the valve body, causing the valve stem to move up, so that the through hole and the internal air passage are instantly aligned and connected; the high pressure gas generated by the positive pressure fan is injected through the through hole to form a pulse back-blowing airflow, which forcibly peels off the dried seafood powder that is heated and adhered to the inner wall of the drying drum. S3, the seafood powder moves towards the collection bin under the strong suction of the negative pressure fan; while the clean gas enters the shell and directly drives the central shaft and rotating blades to rotate, thereby driving the comb baffle to rotate. At this time, the seafood powder hits the comb baffle, and after the powder is blocked and loses kinetic energy, it falls down to the bottom of the collection bin. The clean gas passes through the anti-clogging filter and is discharged through the negative pressure exhaust pipe. S4, the fallen seafood powder falls onto the filter plate. At the same time, the rotational power of the drying drum drives the drive shaft and the notched cam to rotate via the large and small power take-off gears. The outer surface of the notched cam gradually lifts the lever wheel, which drives the lifting lever to slowly raise the gravity hammer. When the notched cam rotates to the notched position, the lever wheel instantly loses its support, and the gravity hammer falls freely to strike the filter plate. Through the periodic gravity impact vibration, the seafood powder adhering to the filter plate is shaken off, allowing it to pass through the filter plate smoothly and be collected.
[0016] This invention provides an apparatus and method for preparing dried marine biological samples for gamma-ray spectrometry analysis. It offers the following advantages: 1. This invention uses a pulse backflush mechanism to generate a powerful pulse backflush airflow by using the rotational power of the drying drum itself and the periodic triggering of the valve stem by the circular track and the impact block. The high-pressure gas is mechanically controlled to generate a powerful pulse backflush airflow. The instantaneously generated high-pressure backflush airflow can forcibly blow off and peel off the dried seafood powder that has been heated and adhered to the inside of the drying drum during the drying process. The detached powder is then resuspended and drawn into the collection bin by the negative pressure airflow at the rear end for collection.
[0017] 2. This invention utilizes an airflow separation mechanism to directly drive the rotating blades by using the kinetic energy of the airflow generated during the negative pressure suction process. Combined with a comb-tooth baffle, the high-speed airflow carrying powder is physically collided and blocked. Without adding any external power source, this invention achieves efficient separation of powder and air, significantly improving the collection rate of marine biological dry powder. At the same time, the anti-clogging filter prevents fine powder from entering the negative pressure suction pipe, protecting the downstream negative pressure fan from wear and extending the service life of the equipment.
[0018] 3. This invention sets up a striking filter mechanism, which directly extracts the rotational power of the drying drum through a gear transmission assembly. The notched cam periodically lifts and instantly releases the gravity hammer, generating a powerful gravity impact on the bottom filter plate. Relying purely on physical gravity, the fine dry powder adhering to the filter plate is quickly shaken off, solving the problem of adhesion and clogging that easily occurs when sieving seafood powder, and ensuring the smoothness of the final material discharge. Attached Figure Description
[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the drying drum of the present invention; Figure 3 This is a schematic diagram of the main motor of the present invention; Figure 4 This is a schematic diagram of the pulse backflush mechanism of the present invention; Figure 5 This is a schematic diagram of the through hole structure of the present invention; Figure 6 This is a schematic diagram of the positive pressure fan of the present invention; Figure 7 This is a schematic diagram of the power take-off gear ring of the present invention; Figure 8 This is a schematic diagram of the airflow separation mechanism of the present invention; Figure 9 This is a schematic diagram of the comb baffle of the present invention; Figure 10 This is a schematic diagram of the transmission shaft of the present invention; Figure 11 This is a schematic diagram of the knocking filter mechanism of the present invention.
[0020] The components include: 1. Drying drum; 2. Pulse backflushing mechanism; 21. Positive pressure fan; 22. Air inlet pipe; 23. Valve body; 24. Valve stem; 25. Roller; 26. Impact block; 27. Circular track; 28. Through hole; 3. Airflow separation mechanism; 31. Outer shell; 32. Central shaft; 33. Rotating blade; 34. Comb baffle; 4. Collection bin; 5. Impact filtration mechanism; 51. Power take-off large gear ring; 52. Power take-off small gear; 53. Drive shaft; 54. Notched cam; 55. Lifting lever; 56. Lever wheel; 57. Gravity hammer; 58. Filter plate; 6. Main motor; 7. Main drive small gear; 8. Main drive large gear ring; 9. Negative pressure fan; 10. Negative pressure exhaust pipe; 11. Anti-clogging filter screen; 12. First support; 13. Second support; 14. Temperature controller; 15. Temperature sensor; 16. Base. Detailed Implementation
[0021] The technical solutions in 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Please see the appendix Figure 1 - Appendix Figure 11 This invention provides a marine organism dry sample preparation device for gamma spectroscopy analysis, including a base 16 and a drying drum 1. The drying drum 1 is used to contain and heat the dehydrated marine organism sample. The inner wall surfaces of the drying drum 1 and the collection bin 4 are polished and coated with an industrial-grade polytetrafluoroethylene anti-stick coating. Marine samples are rich in protein and oil. With the smooth Teflon coating and pulsed backflush airflow, the high-strength adhesion of most materials after heating can be eliminated from the source. It also facilitates quick disassembly and cleaning or in-situ self-cleaning of the equipment after use, and prevents cross-contamination between different batches of samples. The top of the base 16 is fixedly connected to the first support 12 and the second support 13. The drying drum 1 is set between the first support 12 and the second support 13. The main motor 6 is set on the outside of the base 16. The main motor 6 is used to provide the initial core power for the operation of the equipment. The outer side of the second support 13 is set with the collection bin 4. The collection bin 4 is used to collect the separated seafood powder. The outer side of the base 16 is fixedly connected with the negative pressure fan 9. It is used to generate a strong negative pressure suction airflow inside the system to transfer the powder. The outer side of the drying drum 1 is set with the pulse back-blowing mechanism 2. It is used to generate a pulse airflow purely mechanically using the rotation power of the drying drum 1 to blow off the powder adhering inside, preventing the heated product from sticking and being unable to be sucked in. The inside of the collection bin 4 is set with the airflow separation mechanism 3. The airflow separation mechanism 3 is used to physically intercept and efficiently separate the powder by using the power of the suction airflow itself. The inside of the collection bin 4 is set with the knocking filter mechanism 5. The knocking filter mechanism 5 is used to convert the rotational kinetic energy of the drying drum 1 into periodic gravity knocking action to vibrate and prevent blockage. The pulse backflush mechanism 2 includes a positive pressure fan 21, which is fixedly connected to the outside of the base 16. The positive pressure fan 21 is used to continuously supply high-pressure gas to the inside. The output end of the positive pressure fan 21 is fixedly connected to an air inlet pipe 22, and the other end of the air inlet pipe 22 is connected to a valve body 23. The valve body 23 is fixedly connected to the top of the second bracket 13. A valve stem 24 is slidably connected inside the valve body 23. A roller 25 is fixedly connected to the bottom of the valve stem 24, so that the impact block 26 can smoothly push the valve stem 24 up when it passes. A circular track 27 is fixedly connected to the outside of the drying drum 1. The impact block 26 is fixedly connected to the outside of the circular track 27. A through hole 28 is opened inside the valve stem 24, so that when the valve stem 24 moves up, it can instantly connect the air passage to form a backflush airflow.
[0023] Please see the appendix Figure 8 and attached Figure 9 In a preferred embodiment of the present invention, the airflow separation mechanism 3 includes a housing 31, which is fixedly connected to the outside of the collection bin 4. A central shaft 32 is rotatably connected inside the housing 31. Multiple rotating blades 33 are fixedly connected to the outside of the central shaft 32, so that the suction airflow can directly drive its rotation. Multiple comb-tooth baffles 34 are fixedly connected to the outside of the central shaft 32, so that the airflow carrying powder is continuously impacted and obstructed when moving inside, causing the powder to lose kinetic energy and fall downward.
[0024] Please see the appendix Figure 7 Appendix Figure 10 and attached Figure 11In a preferred embodiment of the present invention, the striking filter mechanism 5 includes a large gear ring 51, which is fixedly connected to the outside of the drying drum 1. A small gear 52 is provided on the outside of the drying drum 1. The large gear ring 51 and the small gear 52 mesh with each other to directly extract the rotational power of the drying drum 1. A drive shaft 53 is fixedly inserted inside the small gear 52. A notched cam 54 is fixedly connected to the outside of the drive shaft 53. A lifting lever 55 is rotatably connected inside the collection bin 4. A lever wheel 56 is fixedly connected to the middle of the lifting lever 55. A gravity hammer 57 is fixedly connected to the other end of the lifting lever 55. A filter plate 58 is fixedly connected inside the collection bin 4 for sieving the falling dried seafood powder.
[0025] Please see the appendix Figure 3 In a preferred embodiment of the present invention, a main drive pinion 7 is fixedly connected to the output end of the main motor 6, and a main drive large gear ring 8 is fixedly connected to the outer side of the drying drum 1. The main drive pinion 7 and the main drive large gear ring 8 mesh with each other, and provide a stable and powerful rotation drive for the drying drum 1 through gear reduction transmission.
[0026] Please see the appendix Figure 4 and attached Figure 5 In a preferred embodiment of the present invention, when the impact block 26 rotates with the circular track 27, it contacts the roller 25 and pushes up the valve stem 24. The through hole 28 rises with the valve stem 24 and connects with the air inlet pipe 22 and the internal air passage of the valve body 23, which cleverly realizes the instantaneous opening and closing of the air passage by pure mechanical means without the need for additional electromagnetic control. After the air passage is connected, high-pressure air is blown out from the air hole set inside.
[0027] Please see the appendix Figure 8 and attached Figure 9 In a preferred embodiment of the present invention, the input end of the negative pressure fan 9 is connected to a negative pressure exhaust pipe 10, and the other end of the negative pressure exhaust pipe 10 is fixedly connected to an anti-clogging filter 11. The anti-clogging filter 11 is a wedge-shaped wire mesh with a polytetrafluoroethylene anti-stick coating. The V-shaped mesh structure will not trap powder, and the low-tension coating on the surface greatly reduces the adhesion of powder, thereby avoiding mesh blockage caused by marine micro powder. The clean gas after effective separation can pass through and flow out, preventing micro powder from entering the inside of the negative pressure exhaust pipe 10 and abrading the fan.
[0028] Please see the appendix Figure 8 and attached Figure 9 In a preferred embodiment of the present invention, the rotating blade 33 is arranged on the flow path of the suction airflow of the negative pressure fan 9, and the suction airflow is directly used as the power source. The comb baffle 34 is arranged inside the collection bin 4 to ensure that the powder can have sufficient physical impact with the baffle.
[0029] Please see the appendix Figure 10 and attached Figure 11 In a preferred embodiment of the present invention, temperature sensors 15 are provided on the outer sides of the first support 12 and the second support 13, and a temperature controller 14 is fixedly connected to the outer side of the base 16. In use, the temperature inside the drying drum 1 is adjusted by observing the temperature value of the temperature sensor 14 and using the temperature controller 14 to ensure that the temperature is suitable.
[0030] Please see the appendix Figure 11 In a preferred embodiment of the present invention, when the notched cam 54 rotates to the notched position, the lever wheel 56 loses support, and the gravity hammer 57 falls and strikes the filter plate 58 by its own weight. The dry powder adhering to the filter plate 58 is quickly shaken off by the periodic impact vibration, so as to avoid the mesh clogging.
[0031] The method for preparing dried marine organism samples for gamma-ray spectroscopy analysis described below can be referred to in correspondence with the apparatus for preparing dried marine organism samples for gamma-ray spectroscopy analysis described above.
[0032] This invention also provides a method for preparing dried marine biological samples for gamma-ray spectroscopy analysis, the method comprising the following steps: S1, start the main motor 6. The power of the main motor 6 is smoothly transmitted through the main drive pinion 7 and the main drive gear ring 8, driving the drying drum 1 to start rotating. Simultaneously turn on the positive pressure fan 21 and the negative pressure fan 9 to establish the air pressure environment inside the system in advance. Then, put the marine organisms to be processed into the drying drum 1 for heating, dehydration and pulverization to achieve the preliminary processing of the marine samples. During the heating and drying process, the drying temperature is set not to exceed 80°C by the temperature controller 14 and the temperature sensor 15 to prevent the loss of volatile nuclides. S2, during the continuous rotation and heating of the drying drum 1, the circular track 27 fixed on the outside of the drum drives the impact block 26 to make a synchronous circular motion; the impact block 26 periodically and smoothly pushes up the roller 25 at the bottom of the valve body 23, forcing the valve stem 24 to move upward, so that the through hole 28 and the internal air passage are precisely aligned and connected in an instant; the high-pressure gas delivered by the positive pressure fan 21 is instantly sprayed through the through hole 28, forming a highly explosive pulse back-blowing airflow, which forcibly and thoroughly peels off the dried seafood powder that is heated and adhered to the inner wall of the drying drum 1; S3, the stripped seafood powder is quickly guided to the collection bin 4 by the strong suction generated by the negative pressure fan 9; when the suction airflow carrying the powder enters the outer shell 31, it cleverly uses the air kinetic energy to directly drive the central shaft 32 and the rotating blade 33 to rotate at high speed, thereby driving the comb baffle 34 to form a rotating blocking surface. The seafood powder continuously collides with the comb baffle 34, causing the powder to lose its forward kinetic energy and settle to the bottom of the collection bin 4, realizing gas-solid separation without external power. The separated clean gas passes through the anti-clogging filter 11 and is discharged through the negative pressure exhaust pipe 10, avoiding the wear of the rear fan by the dust. S4, the settled seafood powder falls onto the bottom filter plate 58 to await sieving. At the same time, the rotational kinetic energy of the drying drum 1 is stably extracted by the power take-off large gear ring 51 and the power take-off small gear 52, directly driving the drive shaft 53 and the notched cam 54 to rotate. The outer surface of the notched cam 54 gradually lifts the lever wheel 56, driving the lifting lever 55 to slowly raise the gravity hammer 57 to store energy. When the notched cam 54 rotates to the notched position, the lever wheel 56 instantly loses support, and the gravity hammer 57 falls rapidly with its own weight to strike the filter plate 58. Relying on periodic strong vibrations, the highly viscous seafood powder adhering to the mesh of the filter plate 58 is quickly shaken off, avoiding the risk of sieving blockage, ensuring that the dry sample powder passes through the mesh smoothly and is finally collected.
[0033] The method in this embodiment can be used to execute the above-described device embodiment, and the principle and technical effects are similar, so they will not be repeated here.
[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A marine organism dry sample preparation device for gamma-ray spectrometry analysis, comprising a base (16) and a drying drum (1), characterized in that, The top of the base (16) is fixedly connected to a first bracket (12) and a second bracket (13). The drying drum (1) is located between the first bracket (12) and the second bracket (13). A main motor (6) is located on the outside of the base (16). A collection bin (4) is located on the outside of the second bracket (13). A negative pressure fan (9) is fixedly connected to the outside of the base (16). A pulse back-blowing mechanism (2) is located on the outside of the drying drum (1). An airflow separation mechanism (3) is located inside the collection bin (4). A knocking filter mechanism (5) is located inside the collection bin (4). The pulse backflushing mechanism (2) includes a positive pressure fan (21), which is fixedly connected to the outside of the base (16). The output end of the positive pressure fan (21) is fixedly connected to an air inlet pipe (22), and the other end of the air inlet pipe (22) is connected to a valve body (23). The valve body (23) is fixedly connected to the top of the second bracket (13). A valve stem (24) is slidably connected to the inside of the valve body (23). A roller (25) is fixedly connected to the outside of the valve stem (24). A circular track (27) is fixedly connected to the outside of the drying drum (1). A bumper (26) is fixedly connected to the inside of the circular track (27). A through hole (28) is opened inside the valve stem (24).
2. The marine biological dry sample preparation apparatus for gamma-ray spectroscopy analysis according to claim 1, characterized in that, The airflow separation mechanism (3) includes a housing (31), which is fixedly connected to the outside of the collection bin (4). A central shaft (32) is rotatably connected inside the housing (31). Multiple rotating blades (33) are fixedly connected to the outside of the central shaft (32). Multiple comb-tooth baffles (34) are fixedly connected to the end of the central shaft (32) away from the rotating blades (33).
3. The marine organism dry sample preparation apparatus for gamma-ray spectroscopy analysis according to claim 1, characterized in that, The tapping filter mechanism (5) includes a large gear ring (51) for power taking, which is fixedly connected to the outside of the drying drum (1). A small gear (52) is provided on the outside of the drying drum (1). The large gear ring (51) and the small gear (52) mesh with each other. A drive shaft (53) is fixedly connected to the outside of the small gear (52). A notched cam (54) is fixedly connected to the end of the drive shaft (53) away from the small gear (52). A lifting lever (55) is rotatably connected inside the collection bin (4). A lever wheel (56) is fixedly connected to the outside of the lifting lever (55). A gravity hammer (57) is fixedly connected to the end of the lifting lever (55) away from the lever wheel (56). A filter plate (58) is fixedly connected inside the collection bin (4).
4. The marine biological dry sample preparation apparatus for gamma-ray energy dispersive spectroscopy analysis according to claim 1, characterized in that, The output end of the main motor (6) is fixedly connected to the main drive pinion (7), and the outer side of the drying drum (1) is fixedly connected to the main drive gear ring (8). The main drive pinion (7) and the main drive gear ring (8) mesh with each other.
5. The marine organism dry sample preparation apparatus for gamma-ray spectroscopy analysis according to claim 1, characterized in that, When the impact block (26) rotates with the circular track (27), it contacts the roller (25) and pushes up the valve stem (24). The through hole (28) rises with the valve stem (24) and connects to the air inlet pipe (22) and the internal air passage of the valve body (23).
6. The marine biological dry sample preparation apparatus for gamma-ray energy dispersive spectroscopy analysis according to claim 2, characterized in that, The input end of the negative pressure fan (9) is connected to a negative pressure exhaust pipe (10), and the other end of the negative pressure exhaust pipe (10) is fixedly connected to an anti-clogging filter (11).
7. The marine biological dry sample preparation apparatus for γ-ray energy dispersive spectroscopy analysis according to claim 2, characterized in that, The rotating blade (33) is positioned on the flow path of the negative pressure fan (9) drawing airflow, and the comb-tooth baffle (34) is positioned inside the collection bin (4).
8. The marine biological dry sample preparation apparatus for gamma-ray spectroscopy analysis according to claim 3, characterized in that, Temperature sensors (15) are provided on the outer side of the first bracket (12) and the second bracket (13), and a temperature controller (14) is fixedly connected to the outer side of the base (16).
9. The marine organism dry sample preparation apparatus for gamma-ray spectroscopy analysis according to claim 3, characterized in that, The notched cam (54) is crescent-shaped. When it rotates to the notched position, the gravity hammer (57) falls and strikes the filter plate (58).
10. A method for preparing dried marine biological samples for gamma-ray spectrometry analysis, characterized in that, Using the marine organism dry sample preparation apparatus for gamma-ray spectroscopy analysis according to any one of claims 1-9, the method comprises the following steps: S1, start the main motor (6), the main motor (6) drives the drying drum (1) to start rotating through the main drive pinion (7) and the main drive gear ring (8); at the same time, start the positive pressure fan (21) and the negative pressure fan (9), and then put the marine organisms to be processed into the drying drum (1) for heating, drying and crushing. During the heating and drying process, the drying temperature is set by the temperature controller (14) and the temperature sensor (15); S2, during the rotation and heating process of the drying drum (1), the circular track (27) fixed on the outside of the drum and the impact block (26) on it rotate synchronously; the impact block (26) periodically pushes up the roller (25) at the bottom of the valve body (23), causing the valve stem (24) to move up, so that the through hole (28) is instantly aligned and connected with the internal air passage; the high pressure gas generated by the positive pressure fan (21) is sprayed through the through hole (28) to form a pulse back-blowing airflow, which forcibly peels off the dried seafood powder that is heated and adhered to the inner wall of the drying drum (1); S3, under the strong suction generated by the negative pressure fan (9), the dried seafood powder moves towards the collection bin (4); while the clean gas enters the outer shell (31) and directly drives the central shaft (32) and the rotating blade (33) to rotate, thereby driving the comb baffle (34) to rotate. At this time, the seafood powder hits the comb baffle (34), and after the powder loses its kinetic energy due to the obstruction, it falls downward to the bottom of the collection bin (4). The clean gas passes through the anti-clogging filter (11) and is discharged through the negative pressure exhaust pipe (10). S4, the fallen seafood powder falls onto the filter plate (58). At the same time, the rotational power of the drying drum (1) drives the transmission shaft (53) and the notched cam (54) to rotate via the power take-off large gear ring (51) and power take-off small gear (52). The outer surface of the notched cam (54) gradually lifts the lever wheel (56), which drives the lifting lever (55) to slowly raise the gravity hammer (57). When the notched cam (54) rotates to the notched position, the lever wheel (56) instantly loses support, and the gravity hammer (57) falls freely to strike the filter plate (58). Through periodic gravity impact vibration, the seafood powder adhering to the filter plate (58) is shaken off, allowing it to pass smoothly through the filter plate (58) and be collected.