A sample sampling device for detecting contaminants in aquatic products

Abstract

The application discloses a kind of sample sampling devices for aquatic product pollutant detection, including shell, cutout component and sampling component;The bottom of shell is equipped with opening, opening is equipped with rubber washer and lancet for positioning and fitting.Cutout component includes two symmetrical oblique settings and can be synchronously rotated and separated cutter, cutter side is equipped with strip-shaped mouth and is connected with negative pressure channel and negative pressure collection box, for cutting and synchronously sucking out pollutant on the surface of aquatic product;Sampling component includes sampling mechanism and storage mechanism, storage mechanism is equipped with rotatable disc-shaped storage box, built-in opening downward sampling bottle, sampling bottle has sawtooth groove and helical projection;When sampling, guide cylinder is lowered through pressure block to drive cutter to open, after sealing plate opens, push rod pushes sampling bottle to extend into cut and rotates sampling;The application is through cutting first, then sampling and synchronously sucking out pollutant by negative pressure, effectively avoid cross contamination of surface pollutant to sample, and it is convenient to operate, suitable for aquatic product rapid sampling.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection technology, and in particular to a sample collection device for detecting pollutants in aquatic products. Background Technology

[0002] Current aquaculture pollution monitoring generally relies solely on water sampling devices to collect water samples for testing. This only characterizes the instantaneous pollutant concentration in the water, ignoring the two-way pollutant migration and circulation between the water and aquatic products. Heavy metals, veterinary drugs, and organic pollutants in the aquaculture water accumulate in the muscles and internal organs of aquatic products through gill respiration, surface adsorption, and feeding. Simultaneously, the mucus and scales on the surface of aquatic products adsorb large amounts of suspended pollutants from the water, and various pollutants accumulated within the products can be continuously released back into the aquaculture water through metabolic excretion and the decomposition of biological residues, forming an endogenous pollution cycle. Simply collecting water samples for testing has significant monitoring blind spots: when the pollutant concentration in the water exceeds the standard, it is impossible to determine whether the pollution originates from external water inflow or from pollutants carried back by aquatic products. Therefore, it is also necessary to sample and test the aquatic products themselves to more accurately determine the composition and source of water pollution.

[0003] Currently, the most common sampling methods for aquatic products are still surgical cutting or cylindrical sampling knife puncture. During the cutting process, the outer wall of the sampling knife inevitably comes into contact with contaminants such as fish scales, fish skin, and surface mucus. Subsequently, the knife carries these surface contaminants into the muscle tissue, causing the sample to be contaminated with surface contaminants, which seriously affects the accuracy of subsequent contaminant detection. Summary of the Invention

[0004] The main objective of this invention is to provide a sample collection device for detecting contaminants in aquatic products, thereby addressing existing technical problems.

[0005] To achieve the above objectives, the present invention provides a sample collection device for detecting contaminants in aquatic products, comprising: The outer shell has a hollow internal structure and an opening at the bottom; A cutting assembly, disposed within the housing, includes a cutter, the end of which extends outward through the opening for cutting the surface of aquatic products. The sampling assembly, located within the housing, includes a sampling mechanism and a storage mechanism. The sampling mechanism is used to insert into the aquatic product to perform sampling operations, and the storage mechanism is used to store the extracted samples.

[0006] Furthermore, the cutter is provided in two parts and is symmetrically arranged along the vertical centerline of the outer shell. The cutter is inclined and is rotatably connected to the inner wall of the outer shell. The two cutters rotate and separate synchronously to cut the surface of the aquatic products.

[0007] Furthermore, both the first and second sides of the cutter have a strip-shaped opening near the tip, and the inside of the cutter has a negative pressure channel connected to the strip-shaped opening, which is connected to a negative pressure collection box via a conduit.

[0008] Furthermore, a rubber gasket is provided at the opening, and needles passing through the rubber gasket are evenly distributed at the opening, with an elastic element at the end of the needle.

[0009] Furthermore, the storage mechanism includes a storage box, which has a disc-shaped structure and at least one placement slot. The placement slot is through-hole and has a support block inside. The placement slot contains a sampling bottle with its opening facing downwards. The storage box is located inside the housing and can rotate within the housing. The housing is embedded in the outer shell and is partially located outside the outer shell.

[0010] Furthermore, the sampling bottle has a serrated groove at the mouth and a spiral protrusion on the inner wall of the sampling bottle, and a bottom block with a groove at the bottom of the sampling bottle.

[0011] Furthermore, the sampling mechanism includes a guide tube, which has a channel adapted to the sampling bottle, and the guide tube is controlled to move within the outer casing by an electric rod; It also includes a push rod located above the outer casing, the end of the push rod having a turntable, the turntable having a clamping block, the clamping block cooperating with a groove to fix the sampling bottle, the push rod extending into the placement groove to push the sampling bottle into the guide tube until it extends into the opening cut by the cutter for sampling.

[0012] Furthermore, the outer wall of the guide cylinder is provided with a pressure block, and the surface of the cutter is provided with a protrusion that cooperates with the pressure block. During the movement of the guide cylinder within the outer shell, the pressure block contacts the protrusion, driving the two cutters to rotate and separate synchronously.

[0013] Furthermore, the end of the guide tube has a sealing plate; The housing contains a sensor for detecting the position of the cutter. When the cutter rotates to the correct position, the sealing plate is opened and the negative pressure channel stops working.

[0014] Furthermore, a pressure rod is provided on the top of the housing for controlling the downward pressure of the housing.

[0015] The beneficial effects of this invention are reflected in: This invention employs a division of labor between a cutting component and a sampling component. First, a cutting blade makes an incision on the surface of the aquatic product, and then a sampling mechanism extends into the incision to collect a sample. This step-by-step operation mode of "cut first, then sample" avoids direct contact between the sampling mechanism and contaminants such as fish scales, fish skin, and surface mucus, fundamentally solving the technical problem in existing technologies where the sampling blade carries surface contaminants into the muscle tissue, leading to sample contamination. Simultaneously, the strip-shaped opening on the blade surface and the internal negative pressure channel, combined with a negative pressure collection box, can remove surface contaminants generated at the incision site in real time during the cutting process, further ensuring a clean sampling environment.

[0016] In this invention, the guide tube moves automatically within the outer casing controlled by an electric rod. A push rod extends into the placement slot, pushing the sampling bottle into the guide tube until it reaches the incision to complete sampling. The entire sampling process eliminates the need for manual cutting and sampling, significantly reducing operational difficulty and the technical requirements for operators. Furthermore, the pressure block on the outer wall of the guide tube cooperates with the protrusion on the surface of the cutter, automatically driving the two cutters to rotate and separate synchronously during the movement of the guide tube, achieving linkage control between the cutting and sampling actions.

[0017] The storage mechanism of this invention adopts a disc-shaped storage box structure with at least one placement slot, in which the sampling bottle is placed with its opening facing downwards. The storage box can rotate within the housing, allowing operators to easily replace or replenish the sampling bottles at any time. The sampling bottle has a serrated groove at its opening and spiral protrusions on its inner wall to facilitate sample collection and retention.

[0018] In this invention, a rubber gasket is provided at the opening, and needles are evenly distributed passing through the rubber gasket, with elastic elements at the ends of the needles. When the outer shell is pressed down onto the surface of the aquatic product by the pressure rod, the needles can pierce the skin of the aquatic product for positioning, while the rubber gasket ensures a tight fit between the device and the sample surface, preventing the device from shifting during operation. The elastic element allows the needles to have a certain degree of self-adjustment capability, effectively positioning them without excessively damaging the sample. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sample collection device for detecting pollutants in aquatic products according to the present invention; Figure 2 For the present invention Figure 1 Internal structural diagram; Figure 3 This is a schematic diagram of the incision assembly and sampling assembly of the present invention; Figure 4 This is a schematic cross-sectional view of the sampling component structure of the present invention; Figure 5 For the present invention Figure 4 Explosion-proof diagram of the structure; Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B; Figure 7 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the sampling bottle structure of the present invention; Figure 9 This is a schematic diagram of the cutting blade structure of the present invention.

[0020] Explanation of reference numerals in the attached figures: 100. Outer shell; 101. Opening; 102. Rubber gasket; 103. Needle; 104. Elastic element; 105. Sensor; 106. Pressing rod; 200. Cutting assembly; 201. Cutter; 2011. Strip-shaped opening; 2012. Negative pressure channel; 2013. Negative pressure collection box; 202. Protrusion; 300. Sampling assembly; 310. Sampling mechanism; 311. Guide tube; 3111. Channel; 312. Electric rod; 313. Push rod; 314. Turntable; 315. Clamping block; 316. Pressing block; 317. Sealing plate; 320. Storage mechanism; 321. Storage box; 322. Placement slot; 323. Support block; 324. Sampling bottle; 3241. Serrated groove; 3242. Spiral protrusion; 325. Shell; 326. Bottom block; 327. Groove. Detailed Implementation

[0021] 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. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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 Figure 1-9 The present invention provides a sample sampling device for detecting pollutants in aquatic products, including a shell 100, a cutting assembly 200 and a sampling assembly 300.

[0023] The outer casing 100 has a cylindrical structure with a hollow interior and an opening 101 at the bottom. A pressure rod 106 is located at the top of the outer casing 100, and can be fixedly connected to the center of the top of the outer casing 100. This rod is used by the operator to apply force and press the entire outer casing 100 downwards against the surface of the aquatic product. The outer casing 100 is preferably made of stainless steel or high-strength engineering plastic to provide sufficient structural strength and corrosion resistance.

[0024] A rubber gasket 102 is provided at the opening 101, and the rubber gasket 102 is embedded at the edge of the opening 101 in a ring structure. When the outer shell 100 is pressed down, the rubber gasket 102 fits tightly against the surface of the aquatic product, providing a sealing and anti-slip function to prevent the device from shifting during operation. A needle 103 is also evenly provided at the opening 101, passing through the rubber gasket 102, with the tip of the needle 103 protruding from the lower surface of the rubber gasket 102. An elastic element 104, preferably a helical spring, is provided at the end of the needle 103 and is sleeved on the outside of the needle 103. When the outer shell 100 is pressed down, the needle 103 first pierces the surface of the aquatic product, providing auxiliary positioning; the elastic element 104 provides a buffering force, giving the needle 103 a certain degree of self-adjustment capability, effectively positioning it without excessively damaging the sample.

[0025] The housing 100 is also equipped with a sensor 105, which is preferably a photoelectric sensor or a proximity switch. It is fixedly installed on the inner wall of the housing 100 and is used to detect the rotation position of the cutter 201 in order to accurately control the timing of the subsequent sampling process.

[0026] The cutting assembly 200 is located inside the outer casing 100 and includes two cutters 201, symmetrically arranged along the vertical centerline of the outer casing 100. Each cutter 201 has a sheet-like structure and is angled—that is, the cutter 201 extends gradually downwards and inwards from its connection end with the inner wall of the outer casing 100 towards its free end. The cutters 201 are rotatably connected to the inner wall of the outer casing 100 via a pivot. Under the action of a driving force, the two cutters 201 can rotate synchronously around their respective pivots, thereby separating the tips of the two cutters 201 to cut the surface of the aquatic product, forming a slit.

[0027] Both the first and second surfaces of the cutter 201 (i.e., the two cut surfaces of the cutter 201) have a strip-shaped opening 2011 near the tip. The strip-shaped opening 2011 extends along the length of the cutter 201 and penetrates its surface. Inside the cutter 201, there is a negative pressure channel 2012 communicating with the strip-shaped opening 2011. The negative pressure channel 2012 extends along the inside of the cutter 201 and is connected to a negative pressure collection box 2013 via a conduit. The negative pressure collection box 2013 is fixedly installed inside or outside the housing 100 and contains a negative pressure pump (not shown in the figure) to generate negative pressure suction. When the cutter 201 makes an incision on the surface of the aquatic product, the strip-shaped opening 2011 is located near the incision. The negative pressure in the negative pressure channel 2012 draws in fish scale debris, surface mucus and other contaminants generated at the incision through the strip-shaped opening 2011 and transports them through the conduit to the negative pressure collection box 2013 for centralized collection. This prevents these surface contaminants from falling into the incision and causing sample contamination during subsequent sampling.

[0028] The surface of the cutter 201 is also provided with a protrusion 202. The protrusion 202 is fixedly disposed on the side surface of the cutter 201 facing the inside of the outer shell 100, near the connection end between the cutter 201 and the inner wall of the outer shell 100, and is used to cooperate with the corresponding part of the sampling component 300 to realize the linkage rotation of the cutter 201.

[0029] The sampling component 300 is disposed within the housing 100 and includes a sampling mechanism 310 and a storage mechanism 320.

[0030] The storage mechanism 320 includes a storage box 321, which has a disc-shaped structure and at least one placement slot 322. In this embodiment, multiple placement slots 322 are preferably provided and evenly distributed along the circumference of the storage box 321. The placement slots 322 are through-holes, that is, they extend through the thickness direction of the storage box 321. A support block 323 is provided inside the placement slot 322, which is fixed to the middle position of the inner wall of the placement slot 322 and is used to support the sampling bottle 324. The sampling bottle 324 is placed inside the placement slot 322 with its opening facing downward, that is, the bottle mouth of the sampling bottle 324 faces downward and the bottle bottom faces upward. The sampling bottle 324 is supported by the support block 323, and the bottle body extends downward through the placement slot 322.

[0031] The storage box 321 is disposed within the housing 325 and can rotate within the housing 325. The housing 325 is embedded in the outer shell 100, and a portion of the housing 325 is located on the outer side of the outer shell 100, facilitating the operation of the storage box 321 from the outside by an operator. A rotating fit structure (such as a bearing or shaft) is provided between the housing 325 and the storage box 321, allowing the storage box 321 to rotate around its own axis within the housing 325 to align the sampling bottles 324 in different placement slots 322 with the sampling position.

[0032] The sampling bottle 324 has a serrated groove 3241 at its mouth, which is circumferentially arranged along the edge of the bottle mouth and is serrated to facilitate cutting into the interior of the aquatic product tissue during sampling, thereby improving sampling efficiency. The inner wall of the sampling bottle 324 has a spiral protrusion 3242, which extends spirally along the inner wall of the sampling bottle 324. When the sampling bottle 324 is rotated downwards, the spiral protrusion 3242 helps to cut off the aquatic product tissue sample and retain it inside the bottle. The bottom of the sampling bottle 324 has a base block 326, which is fixedly installed at the bottom of the sampling bottle 324 (i.e., the upper end when the bottle mouth is placed downwards). The base block 326 has a groove 327, which is used to cooperate with corresponding components of the sampling mechanism 310 to fix and drive the sampling bottle 324.

[0033] The sampling mechanism 310 includes a guide tube 311, which has a cylindrical structure and an internal channel 3111 that is adapted to the shape of the sampling bottle 324. The guide tube 311 is controlled to move within the housing 100 by an electric rod 312, preferably an electric push rod or a linear motor. One end of the electric rod 312 is fixed to the inner wall of the housing 100, and the other end is connected to the guide tube 311, which is used to drive the guide tube 311 to move up and down along the vertical direction of the housing 100.

[0034] A pressure block 316 is provided on the outer wall of the guide cylinder 311. The pressure block 316 is fixedly installed on the outer wall of the guide cylinder 311, and its position corresponds to the protrusion 202 on the cutter 201. During the downward movement of the guide cylinder 311 within the outer casing 100, the pressure block 316 contacts the protrusion 202. Through inclined surface engagement or wedge engagement, the two cutters 201 are driven to rotate and separate synchronously around their respective axes, thereby cutting the surface of the aquatic products. Specifically, the lower end face or side face of the pressure block 316 is provided with an inclined surface, and the upper end face or side face of the protrusion 202 is provided with a corresponding engaging inclined surface. When the guide cylinder 311 moves downward, the inclined surface of the pressure block 316 presses against the inclined surface of the protrusion 202, causing the cutter 201 to rotate and open.

[0035] The guide tube 311 has a sealing plate 317 at its lower end. The sealing plate 317 is located at the lower end port of the guide tube 311 and is used to close the lower opening of the channel 3111 in the non-sampling state to prevent external contaminants from entering. The sealing plate 317 can be an electric valve or a sliding baffle structure, which is opened or closed by the signal control of the sensor 105.

[0036] The sampling mechanism 310 also includes a push rod 313 disposed above the housing 100. The push rod 313 is arranged vertically along the housing 100, and its lower end extends into the housing 100. The end of the push rod 313 has a turntable 314, which is disposed at the lower end of the push rod 313 and can rotate freely relative to the push rod 313. The turntable 314 is provided with a clamping block 315, the shape of which is adapted to the groove 327 on the bottom block 326, for fixing the sampling bottle 324 in place. The upper end of the push rod 313 extends out from the top of the housing 100 and can be manually operated by an operator or controlled by an external drive mechanism (such as a motor) to move up and down and rotate. When the storage box 321 rotates to align a placement slot 322 directly below the push rod 313, the push rod 313 extends downward into the placement slot 322. The clamping block 315 engages with the groove 327 to secure the sampling bottle 324. Subsequently, the push rod 313 continues to push the sampling bottle 324 downward, disengaging it from the support block 323 and entering the channel 3111 of the guide tube 311, until the mouth of the sampling bottle 324 extends into the incision made by the cutter 201 for sampling. During the sampling process, the operator can rotate the push rod 313 to rotate the sampling bottle 324, using the serrated groove 3241 at the bottle mouth and the spiral protrusions 3242 on the inner wall of the bottle to cut off the aquatic product tissue sample and retain it inside the sampling bottle 324.

[0037] This invention utilizes a double-blade pre-cutting structure combined with a negative pressure channel to remove water pollutants adsorbed on the surface of aquatic products in real time. This prevents water pollutants carried on the body surface from mixing into tissue samples, ensuring the authenticity and reliability of the aquatic product's test data. At the same time, the sampling process does not scrape off large areas of mucus pollutants that flow back into the water, avoiding human disturbance and contamination of the water samples on site. This allows for the matching and comparison of test results from simultaneously collected water samples and aquatic tissue samples. It can not only predict the risk of aquatic product enrichment based on the level of water pollution, but also trace the source of internal water pollution by analyzing the accumulation of pollutants in the aquatic products.

[0038] Staff typically collect water samples and aquatic product tissue samples simultaneously for bidirectional pollution comparison analysis. After the device is positioned on the aquatic product's surface, the double-bladed cutter moves down and opens to create a pre-incision. Simultaneously, the negative pressure collection box is activated; the strip-shaped opening on the cutter surface generates negative pressure suction, drawing away all contaminants such as heavy metals and veterinary drug particles adsorbed in the surface mucus, completely isolating the surface from water pollution sources. Subsequent sampling vials are inserted into the incision to collect deep muscle tissue, without contacting the surface contaminants. The resulting tissue samples accurately reflect the accumulated contaminant content of the aquatic product. Furthermore, the sampling process does not result in large amounts of mucus or contaminants falling into the aquaculture water, thus not altering the original contaminant concentration in the water. The water sample test values ​​collected simultaneously can be correlated one-to-one with the aquatic product tissue test data obtained by this device, clearly distinguishing whether the contaminants are from external water sources or internal metabolic releases from the aquatic product, achieving complete source tracing and monitoring of aquaculture pollution.

[0039] The specific working process of the sample collection device for detecting contaminants in aquatic products according to the present invention is as follows: First, the operator holds the pressure lever 106, places the outer casing 100 above the surface of the aquatic product to be sampled, and applies downward force to press the outer casing 100 down. The piercing needle 103 first pierces the surface of the aquatic product, the elastic element 104 is compressed, and the rubber gasket 102 fits tightly against the surface of the aquatic product, thus completing the device positioning.

[0040] Subsequently, the electric lever 312 is activated, driving the guide tube 311 to move downwards along the interior of the outer casing 100. During the downward movement of the guide tube 311, the pressure block 316 contacts the protrusion 202 on the cutter 201, and through the inclined plane cooperation, the two cutters 201 are driven to rotate synchronously around their respective axes and separate. The tips of the cutters 201 cut into the surface of the aquatic product and cut open the epidermis and superficial muscle tissue, forming an incision that allows the sampling bottle 324 to enter. During the cutting process, the negative pressure collection box 2013 starts working, and removes contaminants such as fish scale debris and surface mucus generated at the incision through the conduit, negative pressure channel 2012 and strip-shaped opening 2011, ensuring the cleanliness of the inside of the incision.

[0041] Sensor 105 detects the rotation position of cutter 201 in real time. When it detects that cutter 201 has rotated to the correct position (i.e., the cut is fully open), sensor 105 sends a control signal. On the one hand, it controls the sealing plate 317 to open, so that the lower end of channel 3111 of guide tube 311 is unobstructed; on the other hand, it controls the negative pressure channel 2012 to stop working, so as to avoid the negative pressure suction affecting subsequent sampling.

[0042] Next, the operator rotates the storage box 321 on the outside of the housing 325, rotating the placement slot 322 containing the sampling bottle 324 to a position directly opposite the push rod 313. The push rod 313 moves downward, extending into the placement slot 322, where the clamping block 315 engages with the groove 327 at the bottom of the sampling bottle 324 to secure it. The push rod 313 continues to push downward, disengaging the sampling bottle 324 from the support block 323 and entering the channel 3111 of the guide tube 311. The bottle continues to move downward along the channel 3111 until the bottle neck of the sampling bottle 324 passes through the lower opening of the channel 3111 opened by the sealing plate 317, extending into the incision made by the cutter 201 and contacting the muscle tissue of the aquatic product.

[0043] Turntable 314 rotates sampling bottle 324. The serrated groove 3241 at the mouth of sampling bottle 324 cuts into the muscle tissue of the aquatic product. The spiral protrusions 3242 on the inner wall of the bottle, as it rotates, cut off the tissue sample and retain it inside the sampling bottle 324. After sampling, push rod 313 retracts upwards, pulling sampling bottle 324 out of the cut and back into placement slot 322 via channel 3111. Clamp block 315 disengages from groove 327, and sampling bottle 324 is once again supported in placement slot 322 by support block 323. Subsequently, the operator rotates storage box 321 to move the sampling bottle 324 containing the sample away from the sampling station, allowing it to be removed for subsequent contaminant testing.

[0044] It should be noted that if the embodiments of the present invention involve directional indicators such as (up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sample collection device for detecting pollutants in aquatic products, characterized in that... ,include: The outer shell (100) has a hollow internal structure and an opening (101) at the bottom. A cutting assembly (200), disposed within the housing (100), includes a cutter (201), the end of which extends outward through the opening (101) for cutting the surface of aquatic products; The sampling assembly (300), located inside the housing (100), includes a sampling mechanism (310) and a storage mechanism (320). The sampling mechanism (310) is used to insert into the aquatic product to perform sampling operations, and the storage mechanism (320) is used to store the extracted sample.

2. The sample collection device for detecting pollutants in aquatic products as described in claim 1, characterized in that: The cutter (201) is provided in two and is symmetrically arranged along the vertical center line of the outer shell (100). The cutter (201) is inclined and is rotatably connected to the inner wall of the outer shell (100). The two cutters (201) rotate and separate synchronously to cut the surface of the aquatic products.

3. The sample collection device for detecting pollutants in aquatic products as described in claim 2, characterized in that: The first and second sides of the cutter (201) both have a strip-shaped opening (2011) near the tip, and the cutter (201) has a negative pressure channel (2012) inside that is connected to the strip-shaped opening (2011). The negative pressure channel (2012) is connected to a negative pressure collection box (2013) through a conduit.

4. The sample collection device for detecting pollutants in aquatic products as described in claim 1, characterized in that: A rubber gasket (102) is provided at the opening (101), and a needle (103) passing through the rubber gasket (102) is uniformly provided at the opening (101), and an elastic element (104) is provided at the end of the needle (103).

5. The sample collection device for detecting pollutants in aquatic products as described in claim 1, characterized in that: The storage mechanism (320) includes a storage box (321), which has a disc-shaped structure and at least one placement slot (322). The placement slot (322) is through-hole, and a support block (323) is provided inside the placement slot (322). A sampling bottle (324) is placed inside the placement slot (322) with its opening facing downwards. The storage box (321) is located inside the housing (325) and can rotate within the housing (325). The housing (325) is embedded in the outer shell (100) and is partially located outside the outer shell (100).

6. The sample collection device for detecting pollutants in aquatic products as described in claim 5, characterized in that: The sampling bottle (324) has a serrated groove (3241) at the mouth and a spiral protrusion (3242) on the inner wall of the sampling bottle (324). The bottom of the sampling bottle (324) is provided with a bottom block (326) and a groove (327) on the bottom block (326).

7. The sample collection device for detecting pollutants in aquatic products as described in claim 6, characterized in that: The sampling mechanism (310) includes a guide tube (311), which has a channel (3111) adapted to the sampling bottle (324), and the guide tube (311) is controlled to move within the outer shell (100) by an electric rod (312); It also includes a push rod (313) located above the outer casing (100), the end of the push rod (313) having a turntable (314), the turntable (314) having a clamping block (315), the clamping block (315) cooperating with the groove (327) to fix the sampling bottle (324), the push rod (313) extending into the placement groove (322) to push the sampling bottle (324) into the guide tube (311) until it extends into the opening cut by the cutter (201) for sampling.

8. The sample collection device for detecting pollutants in aquatic products as described in claim 7, characterized in that: The outer wall of the guide tube (311) is provided with a pressure block (316), and the surface of the cutter (201) is provided with a protrusion (202) that cooperates with the pressure block (316). During the movement of the guide tube (311) inside the outer shell (100), the pressure block (316) contacts the protrusion (202), driving the two cutters (201) to rotate and separate synchronously.

9. A sample collection device for detecting pollutants in aquatic products as described in claim 7, characterized in that: The end of the guide tube (311) has a sealing plate (317). The housing (100) has a sensor (105) for detecting the position of the cutter (201). When the cutter (201) is rotated into position, the sealing plate (317) is opened and the negative pressure channel (2012) stops working.

10. A sample collection device for detecting pollutants in aquatic products as described in claim 1, characterized in that: The top of the housing (100) is provided with a pressure rod (106) for controlling the downward pressure of the housing (100).

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