Rapid detection device for radionuclides in aquatic products

Abstract

The invention discloses a device for rapidly detecting radionuclides in aquatic products, which comprises a blanking device, a feeding and discharging conveying line, an unfreezing and drying cutting machine and a carbonization ashing machine, and is characterized in that the blanking device is used for quantitatively blanking the aquatic products and comprises a hopper and a belt discharging device integrated at the bottom side of the hopper; the output side of the belt discharging device faces the feeding conveying line, the feeding and discharging conveying line comprises a rack, a first conveying line and a second conveying line, the first conveying line and the second conveying line are arranged on the inner side of the rack, the first conveying line and the second conveying line are arranged in an up-down parallel mode and are opposite in input and output direction, and the input side of the first conveying line is connected with the output side of the belt discharging device in a bearing mode. The output side of the first conveying line is connected with the unfreezing and drying cutting machine, the input side of the second conveying line is connected with the unfreezing and drying cutting machine, and the output side of the second conveying line is connected with the carbonization ashing machine. The rapid detection device disclosed by the invention can be used as a pretreatment device to be matched with a gamma spectrometer, so that the measurement process of radionuclides in aquatic products is quicker.

Description

Technical Field

[0001] The invention relates to the field of pre-treatment and detection of radioactive nuclides in aquatic products, and in particular to a rapid detection device for radioactive nuclides in aquatic products. Background Art

[0002] The radioactive substances that cause radioactive contamination of food are mainly natural radioactive substances and artificial radioactive substances. Since the distribution of natural radioactive substances in nature is very scattered, it is difficult to form a high concentration of enrichment in food under natural conditions, and the probability of natural radioactive substances enriched by artificial technology to contaminate food is very small, so the radioactive contamination of food in most cases is considered to be artificial radioactive substances. The sources of artificial radioactive substances are mainly atmospheric or underground nuclear tests, nuclear power plants and other nuclear reactors, releases in normal operation or accident conditions, reactor spent fuel reprocessing, medical or industrial radioactive nuclides, leakage of isotope power or heat source devices, etc. The pollution of the environment including food by artificial radioactive substances is often associated with accidents, but rarely occurs under normal circumstances. Radioactive contamination of food generally includes the contamination of the surface of food and its production materials by radioactive substances, and the inclusion of radioactive substances in food and its production materials through absorption, material exchange, ingestion, enrichment and other processes. In the early stage of a nuclear accident where radioactive substances leak, surface contamination becomes the main form of radioactive contamination of food and its production materials. In the later stage of a nuclear accident, the inclusion of radioactive substances in the interior becomes the main form of contamination.

[0003] Since the Fukushima nuclear accident in Japan, the radioactive contamination of seawater and whether the aquatic products in it are contaminated by radioactivity has attracted worldwide attention. Cesium isotopes have become the focus of attention due to their strong toxicity and long half-life.

[0004] The existing methods for detecting cesium isotopes and other radionuclides in aquatic products / seafoods include:

[0005] 1) A method for detecting radioactive nuclear radiation elements in North Pacific squid published in Chinese patent publication number CN105785418B, which collects squid samples, thaws the samples, cuts the samples, burns them into ashes, weighs and marks them, and freezes them to detect radioactive nuclides; at the same time, according to the physiological characteristics of squid, it is divided into four parts: head, viscera, trunk, and fins for detection, and explores the specific distribution of nuclides in squid from the perspective of food safety and radionuclide contamination.

[0006] 2) Chinese patent CN109870474A discloses a method for rapid detection of radioactive cesium in aquatic products. The method uses a fresh sample HPGe-γ spectrum active efficiency curve fitting analysis method to detect radioactive cesium in aquatic products. The method has the advantages of simple sample preparation, reliable analysis results and high accuracy. Fresh sample detection does not require ashing of the sample. Compared with existing detection methods, the detection time is greatly shortened while a sufficiently low minimum detection limit can be obtained.

[0007] The above methods are all based on gamma spectrometer detection, the difference is that file 1 is to ashing the product after treatment, and file 2 is to use fresh sample detection. However, no matter which detection method is used, it is necessary to use detection / processing equipment for pre-treatment so that the subsequent gamma spectrometer can perform the measurement work.

[0008] The inventor has searched and found no literature or comparative patents on the market regarding a rapid detection device for radionuclides in aquatic products. Based on this, the present invention proposes a rapid detection device for radionuclides in aquatic products. The rapid detection device can be used as a pre-processing device in conjunction with a gamma spectrometer to obtain aquatic product standard samples in batches and automatically, thereby making the determination process of radionuclides in aquatic products faster. Summary of the invention

[0009] The purpose of the present invention is to provide a rapid detection device for radioactive nuclides in aquatic products. The detection device can be used as a pre-processing device in conjunction with a gamma spectrometer to obtain aquatic product standard samples in batches and automatically, thereby making the determination process of radioactive nuclides in aquatic products faster.

[0010] To achieve the above object, the present invention provides the following technical solution: a rapid detection device for radioactive nuclides in aquatic products, comprising:

[0011] A feeder, used for quantitatively feeding aquatic products, comprises a hopper and a belt feeder integrated at the bottom of the hopper, wherein the output side of the belt feeder faces the feeding conveyor line;

[0012] The loading and unloading conveyor line includes a frame and a conveyor line 1 and a conveyor line 2 arranged inside the frame, wherein the conveyor line 1 and the conveyor line 2 are arranged in parallel in the upper and lower directions and their input and output directions are opposite, the input side of the conveyor line 1 is connected to the output side of the belt discharger, the output side of the conveyor line 1 is connected to the thawing, drying and cutting machine, the input side of the conveyor line 2 is connected to the thawing, drying and cutting machine, and the output side of the conveyor line 2 is connected to the carbonizing and incinerating machine;

[0013] Thawing, drying and cutting machine, used for thawing, cutting and drying aquatic products, including a chassis, thawing and drying components, a material tray, a lifting component and a cutting component;

[0014] The carbonizing and ashing machine has a carbonizing chamber inside, and a material receiving port connected to the output end of the second conveyor line is provided on the side facing the thawing, drying and cutting machine. The carbonizing and ashing machine is used to carbonize and ash the aquatic products input through the second conveyor line.

[0015] Preferably, the lifting assembly is a scissor lift, which is installed on the bottom side of the chassis and the scissor lift is equipped with a mounting tray.

[0016] Preferably, a side opening is provided on one side of the chassis for the loading and unloading conveyor lines to extend into, an inspection port is provided on the outside of the chassis, and a top opening is provided on the top side of the chassis, in which a positioning frame is embedded.

[0017] Preferably, the material tray includes a perforated tray and a water collecting tray arranged in a stacked manner, wherein the perforated tray is located on the upper side of the water collecting tray and has positioning notches at the four corners of the outer side, and a plurality of perforated holes for draining water are distributed on the end surface of the perforated tray. When the thawing and drying assembly moves upward and heats and thaws the aquatic product on the perforated tray, the thawed water and blood on the aquatic product will flow out from the perforated holes and be collected by the water collecting tray to avoid equipment contamination caused by the blood during thawing.

[0018] Preferably, the thawing and drying assembly comprises a vertical track, an electric heating plate, a cylinder and a support, wherein the vertical track is installed around the outer side of the scissor lift, and a slide can be slidably mounted on each vertical track.

[0019] Preferably, the cylinder can be connected to one side of the slide, and the cylinder shaft end is connected to the pillar, which can pass through the positioning notch on the leak plate, and an electric heating plate is installed on one side of the pillar, and the electric heating plate can move up or down with the cylinder to surround the outer periphery of the leak plate. The thawing and drying component adopts a pneumatic lifting structure. When the material tray moves up with the scissor lift, the cylinder will drive the electric heating plate downward, which can avoid the electric heating plate occupying a large position and interfering with the cutting component, thereby affecting the cutting accuracy.

[0020] Preferably, the cutting assembly is used to cut the aquatic products carried on the perforated plate when the perforated plate can be extended into the positioning frame along with the scissor lift. The cutting assembly includes a side rail frame, a slide, a screw, an electric slide and a cutting head, wherein the side rail frame is distributed along the outer side of the top opening of the chassis, a screw is provided in the side rail frame, the screw is driven by a motor, and a slide is installed on the inner side of the screw and the side rail frame, and the slide extends to the top side of the side rail frame.

[0021] Preferably, the electric slide is mounted on the slides on both sides of the side rail frame, the electric slide is a screw slide or a synchronous belt slide, and a cutting head is installed on the front side of the sliding end of the electric slide. The cutting assembly can move in the X-axis and Y-axis to perform mobile cutting, and the cutting head is a disc cutting or a wire cutting. The cutting assembly can divide the aquatic product into multiple small pieces, which can improve the subsequent drying and carbonization process.

[0022] Preferably, the size of the leak plate matches the size of the positioning frame. The leak plate can go up with the scissors lift to receive the aquatic products output through conveyor line one, the leak plate can go up with the scissors lift and extend into the positioning frame to cut the aquatic products carried thereon through the cutting assembly, and the leak plate can go down with the scissors lift to output the aquatic products carried thereon from conveyor line two.

[0023] Preferably, the above-mentioned detection equipment also includes a detection chamber and a HPGe-γ spectrometer. The temperature in the detection chamber is set to 25°C. The aquatic product samples after thawing, cutting, drying, carbonization and ashing are placed in the detection chamber, and the sample box is detected using the HPGe-γ spectrometer.

[0024] The specific use and testing steps of the device include:

[0025] Step 1: The hopper releases the aquatic products (frozen products) and outputs them to the conveyor line 1 through the belt discharger;

[0026] Step 2: The conveyor line 1 receives the material and conveys it to the thawing, drying and cutting machine. The scissor lift in the thawing, drying and cutting machine drives the material tray to receive the material. After the material is received, the electric heating plate on the lower side of the material tray moves upward under the action of the cylinder. The electric heating plate surrounds the outer periphery of the perforated plate. The electric heating plate heats and thaws the aquatic products (frozen products) on the perforated plate. At this time, the aquatic products (normal temperature) proceed to the next step;

[0027] Step 3: The leak plate can be extended into the positioning frame with the scissor lift. At this time, the cutting assembly moves through the side rail frame and the electric slide, and uses the cutting head to cut the aquatic product (normal temperature) into multiple small pieces to facilitate the subsequent drying and carbonization processes;

[0028] Step 4: The scissor lift drives the perforated plate downward, and the electric heating plate on the lower side of the plate moves upward under the action of the cylinder. The electric heating plate surrounds the outer periphery of the perforated plate, and the electric heating plate heats and dries the small pieces of aquatic products;

[0029] Step 5: The scissor lift drives the perforated plate to continue to move downward. When it moves downward to the position of conveyor line 2, the push plate on the perforated plate pushes the dried aquatic product onto conveyor line 2, and conveyor line 2 transfers it to the carbonization incinerator.

[0030] Step 6: The carbonization and ashing machine carbonizes and dusts the dried aquatic products, and after treatment, they are packed into boxes and transferred to the testing room;

[0031] Step 7: Use the HPGe-γ spectrometer in the detection room to detect radionuclides in the sample box.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The rapid detection device of the present invention can be used as a pre-processing device in conjunction with a gamma spectrometer to obtain aquatic product standard samples in batches and automatically, thereby making the determination process of radionuclides in aquatic products faster.

[0034] 2. The rapid detection device of the present invention is mainly used to obtain standard samples of aquatic products. It adopts a thawing, drying and cutting machine, which can thaw, cut and dry aquatic products. It adopts a circulation processing + double conveyor line loading and unloading method to process aquatic products such as fish and shrimps. While the processing efficiency is high, the equipment occupies a small space, which can meet the use of small laboratories. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the feeder and the feeding and unloading conveyor line in the embodiment of the present invention;

[0037] Figure 3 It is a structural schematic diagram of a thawing, drying and cutting machine in an embodiment of the present invention;

[0038] Figure 4 For the present invention Figure 3 Schematic diagram of the local structure in;

[0039] Figure 5 Schematic diagram of the structure of the cutting assembly in an embodiment of the present invention.

[0040] In the figure: 1. feeder; 101. hopper; 102. belt feeder; 2. loading and unloading conveyor line; 201. frame; 202. conveyor line 1; 203. conveyor line 2; 3. thawing, drying and cutting machine; 301. chassis; 302. positioning frame; 303. leak plate; 304. water collecting plate; 305. lifting assembly; 306. vertical track; 307. electric heating plate; 308. cylinder; 309. pillar; 310. positioning notch; 311. side rail frame; 312. slide; 313. screw; 314. electric slide; 315. cutting head; 316. push plate; 317. push rod; 4. carbonization and incineration machine. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention provides a technical solution: a rapid detection device for radioactive nuclides in aquatic products. The rapid detection device can be used as a pre-processing device in conjunction with a gamma spectrometer to obtain aquatic product standard samples in batches and automatically, thereby making the determination process of radioactive nuclides in aquatic products faster.

[0045] See also Figure 1-Figure 2 , a rapid detection device for radionuclides in aquatic products, comprising:

[0046] The feeder 1 is used to feed the aquatic product quantitatively, and includes a hopper 101 and a belt feeder 102 integrated at the bottom of the hopper 101, wherein the output side of the belt feeder 102 faces the feeding conveyor line;

[0047] The loading and unloading conveyor line 2 includes a frame 201 and a conveyor line 1 202 and a conveyor line 203 arranged inside the frame 201, wherein the conveyor line 1 202 and the conveyor line 2 203 are arranged in parallel up and down and their input and output directions are opposite, the input side of the conveyor line 1 202 is connected to the output side of the belt discharger 102, the output side of the conveyor line 1 202 is connected to the thawing, drying and cutting machine 3, the input side of the conveyor line 2 203 is connected to the thawing, drying and cutting machine 3, and the output side of the conveyor line 2 203 is connected to the carbonizing and incinerating machine 4;

[0048] Thawing, drying and cutting machine 3, used for thawing, cutting and drying aquatic products;

[0049] The carbonizing and ashing machine 4 has a carbonizing chamber inside, and a material receiving port connected to the output end of the conveyor line 203 on the side facing the thawing, drying and cutting machine 3. The carbonizing and ashing machine 4 is used to carbonize and ash the aquatic products input through the conveyor line 203.

[0050] See also Figure 3 In this embodiment, the thawing, drying and cutting machine 3 includes a chassis 301, a thawing and drying component, a material tray, a lifting component 305 and a cutting component. The lifting component 305 is a scissor lift, which is installed on the bottom side of the chassis 301 and the material tray is installed on the scissor lift.

[0051] In this embodiment, a side opening is provided on one side of the chassis 301 for the loading and unloading conveyor line 2 to extend into, an inspection port is provided on the outside of the chassis 301, and a top opening is provided on the top side of the chassis 301, in which a positioning frame 302 is embedded.

[0052] See also Figure 4 In this embodiment, the material tray includes a leaking plate 303 and a water collecting plate 304 arranged in a stacked manner, wherein the leaking plate 303 is located on the upper side of the water collecting plate 304 and has positioning notches 310 at its four outer corners, and a plurality of leaking holes for draining water are distributed on the end surface of the leaking plate 303. When the thawing and drying assembly moves upward and heats and thaws the aquatic products on the leaking plate 303, the thawed water and blood on the aquatic products will flow out from the leaking holes and be collected by the water collecting plate 304 to avoid equipment contamination caused by blood during thawing.

[0053] In this embodiment, the thawing and drying assembly includes a vertical rail 306, an electric heating plate 307, a cylinder 308 and a support 309, wherein the vertical rail 306 is installed around the outer side of the scissor lift, and a slide can be slidably installed on each vertical rail 306.

[0054] In this embodiment, the cylinder 308 can be connected to one side of the slide, and the shaft end of the cylinder 308 is connected to the pillar 309, which can pass through the positioning notch 310 on the leaking hole plate 303. The electric heating plate 307 is installed on one side of the pillar 309, and the electric heating plate 307 can go up or down with the cylinder 308 to surround the outer periphery of the leaking hole plate 303. The thawing and drying component adopts a pneumatic lifting structure. When the material tray goes up with the scissor lift, the cylinder 308 will drive the electric heating plate 307 downward, which can avoid the electric heating plate 307 occupying a large position and interfering with the cutting component to affect the cutting accuracy.

[0055] See also Figure 5 In this embodiment, the cutting assembly is used to cut the aquatic products carried on the leaking plate 303 when the leaking plate 303 can be extended into the positioning frame 302 along with the scissor lift. The cutting assembly includes a side rail frame 311, a slide 312, a screw 313, an electric slide 314 and a cutting head 315, wherein the side rail frame 311 is distributed along the outer side of the top opening of the chassis 301, a screw 313 is provided in the side rail frame 311, and the screw 313 is driven by a motor, and a slide 312 is installed inside the screw 313 and the side rail frame 311, and the slide 312 extends to the top side of the side rail frame 311.

[0056] In this embodiment, the electric slide 314 is mounted on the slides 312 on both sides of the side rail frame 311. The electric slide 314 is a screw slide or a synchronous belt slide. The cutting head 315 is installed on the front side of the sliding end of the electric slide 314. The cutting assembly can move along the X-axis and the Y-axis to perform mobile cutting. The cutting head 315 is a disc cutting or a wire cutting. The cutting assembly can divide the aquatic product into multiple small pieces, which can improve the subsequent drying and carbonization process.

[0057] See also Figure 4 In this embodiment, the size of the leak plate 303 matches the size of the positioning frame 302. The leak plate 303 can go up with the scissor lift to receive the aquatic products output through the conveyor line 202. The leak plate 303 can go up with the scissor lift to extend into the positioning frame 302 and cut the aquatic products carried thereon through the cutting component. The leak plate 303 can go down with the scissor lift to output the aquatic products carried thereon from the conveyor line 203.

[0058] In this embodiment, a push plate 316 is further provided on the perforated disc 303 . The push plate 316 is pushed by a push rod 317 at the rear side thereof to push out the aquatic product carried on the perforated disc 303 .

[0059] In this embodiment, the above-mentioned detection equipment also includes a detection chamber and a HPGe-γ spectrometer (not shown in the figure). The temperature in the detection chamber is set to 25°C. The aquatic product samples that have been thawed, cut, dried, carbonized and ashed are placed in the detection chamber, and the sample box is detected using the HPGe-γ spectrometer.

[0060] The specific use and testing steps of the device include:

[0061] Step 1: The hopper 101 releases the aquatic product (frozen product) and outputs it to the conveyor line 1 202 through the belt discharger 102;

[0062] Step 2: The conveyor line 202 receives the material and conveys it to the thawing, drying and cutting machine 3. The scissor lift in the thawing, drying and cutting machine 3 drives the material tray to receive the material. After the material is received, the electric heating plate 307 on the lower side of the material tray moves upward under the action of the cylinder 308. The electric heating plate 307 surrounds the outer periphery of the leaking plate 303. The electric heating plate 307 heats and thaws the aquatic products (frozen products) on the leaking plate 303. At this time, the aquatic products (normal temperature) proceed to the next step;

[0063] Step 3: The leaking plate 303 can be extended into the positioning frame 302 with the scissor lift. At this time, the cutting assembly moves through the side rail frame 311 and the electric slide 314, and uses the cutting head 315 to cut the aquatic product (normal temperature) into multiple small pieces to facilitate the subsequent drying and carbonization processes;

[0064] Step 4: The scissor lift drives the perforated plate 303 downward, and the electric heating plate 307 on the lower side of the plate moves upward under the action of the cylinder 308. The electric heating plate 307 surrounds the outer periphery of the perforated plate 303, and the electric heating plate 307 heats and dries the small pieces of aquatic products;

[0065] Step 5: The scissor lift drives the perforated plate 303 to continue to descend. When it descends to the position of the second conveyor line 203, the push plate 316 on the perforated plate 303 pushes the dried aquatic product onto the second conveyor line 203, and the second conveyor line 203 transfers it to the carbonization incinerator 4;

[0066] Step 6: The carbonization and ashing machine 4 performs carbonization and dust treatment on the dried aquatic products, and after treatment, the products are packed into boxes and transferred to the testing room;

[0067] Step 7: Use the HPGe-γ spectrometer in the detection room to detect radionuclides in the sample box.

[0068] It is worth noting that the entire device is controlled by a general control system. Since the equipment matched with the control system is commonly used equipment and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0069] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid detection device for radionuclides in aquatic products, characterized in that: include: A feeder (1) is used for quantitatively feeding aquatic products, comprising a hopper (101) and a belt feeder (102) integrated at the bottom of the hopper (101), wherein the output side of the belt feeder (102) faces a feeding conveyor line; The loading and unloading conveyor line (2) comprises a frame (201) and a conveyor line 1 (202) and a conveyor line 2 (203) arranged inside the frame (201), wherein the conveyor line 1 (202) and the conveyor line 2 (203) are arranged in parallel in the upper and lower directions and have opposite input and output directions, the input side of the conveyor line 1 (202) is connected to the output side of the belt discharger (102), the output side of the conveyor line 1 (202) is connected to the thawing, drying and cutting machine (3), the input side of the conveyor line 2 (203) is connected to the thawing, drying and cutting machine (3), and the output side of the conveyor line 2 (203) is connected to the carbonization and ashification machine (4); The thawing, drying and cutting machine (3) is used for thawing, cutting and drying aquatic products, and comprises a machine case (301), a thawing and drying component, a material tray, a lifting component (305) and a cutting component, wherein a side opening is provided on one side of the machine case (301) for a loading and unloading conveyor line (2) to extend into, an inspection port is provided on the outside of the machine case (301), and a top opening is provided on the top side of the machine case (301), and a positioning frame (302) is embedded in the top opening; The carbonizing and ashing machine (4) has a carbonizing chamber inside and a material receiving port connected to the output end of the second conveyor line (203) on the side facing the thawing, drying and cutting machine (3). The carbonizing and ashing machine (4) is used to perform carbonizing and ashing treatment on the aquatic products input through the second conveyor line (203).

2. The device for rapid detection of radionuclides in aquatic products according to claim 1, characterized in that: The lifting assembly (305) is a scissor lift, which is installed on the bottom side of the chassis (301) and the scissor lift is installed on the mounting tray.

3. The device for rapid detection of radionuclides in aquatic products according to claim 2, characterized in that: The material tray comprises a leakage tray (303) and a water collecting tray (304) arranged in a stacked manner, wherein the leakage tray (303) is located on the upper side of the water collecting tray (304) and has positioning notches (310) at four corners of its outer side, and a plurality of leakage holes for draining water are distributed on the end surface of the leakage tray (303).

4. The device for rapid detection of radionuclides in aquatic products according to claim 1, characterized in that: The thawing and drying assembly comprises a vertical track (306), an electric heating plate (307), a cylinder (308) and a support (309), wherein the vertical track (306) is installed around the outer side of the scissor lift, and a slide table can be slidably installed on each vertical track (306).

5. The device for rapid detection of radionuclides in aquatic products according to claim 4, characterized in that: The cylinder (308) can be connected to one side of the slide, and the axial end of the cylinder (308) is connected to a support (309). The support (309) can pass through a positioning notch (310) on the leak plate (303). An electric heating plate (307) is installed on one side of the support (309). The electric heating plate (307) can move up or down with the cylinder (308) to surround the outer periphery of the leak plate (303).

6. The device for rapid detection of radionuclides in aquatic products according to claim 1, characterized in that: The cutting assembly is used to cut the aquatic products carried on the leaking plate (303) when the leaking plate (303) can be extended into the positioning frame (302) along with the scissor lift. The cutting assembly includes a side rail frame (311), a slide frame (312), a screw (313), an electric slide table (314) and a cutting head (315), wherein the side rail frame (311) is distributed along the outer side of the top opening of the chassis (301), a screw (313) is arranged in the side rail frame (311), and the screw (313) is driven by a motor, and a slide frame (312) is arranged inside the screw (313) and the side rail frame (311), and the slide frame (312) extends to the top side of the side rail frame (311).

7. The device for rapid detection of radionuclides in aquatic products according to claim 6, characterized in that: The electric slide (314) is mounted on the slides (312) on both sides of the side rail frame (311). The electric slide (314) is a screw slide or a synchronous belt slide. A cutting head (315) is installed on the front side of the sliding end of the electric slide (314).

8. The device for rapid detection of radionuclides in aquatic products according to claim 6, characterized in that: The size of the leaking plate (303) matches the size of the positioning frame (302). The leaking plate (303) can go up with the scissor lift to receive the aquatic product output through the conveyor line 1 (202). The leaking plate (303) can go up with the scissor lift to extend into the positioning frame (302) to cut the aquatic product carried thereon through the cutting component. The leaking plate (303) can go down with the scissor lift to output the aquatic product carried thereon from the conveyor line 2 (203).

9. A rapid detection device for radionuclides in aquatic products according to claim 8, characterized in that: The perforated disc (303) is also provided with a push plate (316), which is pushed by a push rod (317) at the rear side thereof and pushes out the aquatic product carried on the perforated disc (303).

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