CN111766100B - A sampling device for detecting drug residues in aquatic products - Google Patents

Abstract

The application discloses a sampling device for detecting aquatic product drug residues, which belongs to the technical field of detection sampling and comprises the following components: the device comprises an insertion tube, wherein a transition tube and a penetrating tube which are coaxially arranged with the insertion tube are arranged at the lower port of the insertion tube; a bevel blade having a lower end fixed to an outer circumferential surface of the penetration cylinder and an upper end inclined in a direction away from the outer circumferential surface of the penetration cylinder; the compressing piece is detachably arranged at the upper port of the cannula. The sampling device for detecting the aquatic product drug residues can obtain columnar samples with regular shapes in the sampling process, is convenient for measuring the quantity of the samples through the length of the samples, and can reduce the weighing times in the subsequent detection process; in the sampling process, the obtained columnar sample can smoothly enter the sample tube arranged in the cannula, the sample does not need secondary transfer, the sample is prevented from being adhered to the inner wall of the sampling device, and the sample is prevented from being polluted by secondary pollution in the transfer process.

Description

A sampling device for detecting drug residues in aquatic products

Technical field

The invention relates to a sampling device for detecting drug residues in aquatic products, and belongs to the technical field of detection and sampling.

Background technique

Aquatic products are rich in protein, fat, minerals and vitamins, etc., with high nutritional value, and are a major food source. Aquatic products such as cod, seabass, and catfish are susceptible to pollution from the ocean and freshwater environment as well as the use of pharmaceuticals during the production process. For example, harmful substances such as pesticides, fungicides, and industrial wastewater that flow into the breeding environment can easily enter aquatic products. People's health will be threatened after long-term consumption of contaminated aquatic products. Therefore, the quality testing of aquatic products is the focus of food safety supervision and quality control.

In recent years, with the development of aquatic product breeding industry, the demand for aquatic product quality testing has become higher and higher. When testing the quality of aquatic products, it is necessary to take a certain amount of samples from selected parts of the aquatic products and homogenize them, and then use specific reagents and instruments to detect the content of the target substance. Sampling is the first step in the aquatic product testing process. The cleanliness of the sampling process affects the accuracy of subsequent testing results. After obtaining the detached fish sample from the traditional sampling tube, other operations are required to move the sample into the sample box. During the movement process, the sample is easy to come into contact with the surrounding fish surface or other items and is easily contaminated. In order to facilitate the extraction of samples from the sampling tube, some sampling devices are specially equipped with a pushing structure to push the sample out of the sampling tube. Since the fish meat is relatively soft and tender, such sampling devices will crush the fish meat during the process of pushing the fish meat out of the sampling tube. Pressing the fish meat will cause the fish meat to stick to the sampling tube, resulting in loss of sample volume. Moreover, the subsequent cleaning and disinfection of the sampling device is cumbersome, and there are many cleaning dead spots, making it difficult to ensure the cleanliness of the sampling device during repeated use. In addition, when testing samples, it is usually necessary to add detection reagents quantitatively according to the sample amount. It is difficult to evaluate the sampling amount with traditional sampling devices, and operators have to weigh multiple times to obtain a single sample of required weight.

It should be noted that the above content falls within the scope of the inventor's technical knowledge and does not necessarily constitute prior art.

Contents of the invention

The purpose of the present invention is to solve the problems existing in the prior art and provide a sampling device for detecting drug residues in aquatic products, which can obtain regular columnar samples during the sampling process. The sample does not need to be transferred twice to avoid secondary damage. pollution, and easy to clean and disinfect.

The present invention achieves the above objects by adopting the following technical solutions:

A sampling device for detecting drug residues in aquatic products, including:

The cannula has an upper port and a lower port arranged oppositely. The lower port of the cannula is provided with a transition barrel and a piercing barrel that are coaxially arranged with the cannula. The outer surface of the piercing barrel is The diameter and the inner diameter are respectively smaller than the outer diameter and the inner diameter of the cannula. The transition tube is tapered. The upper port of the insertion tube and the lower port of the cannula are smoothly connected through the transition tube. The lower port of the entry barrel is set in a sharp blade shape;

Bevel cutting blade, the lower end of the bevel cutting blade is fixed on the outer circumferential surface of the piercing barrel, the upper end of the bevel cutting blade is inclined in a direction away from the outer circumferential surface of the piercing barrel, and the blade surface of the bevel cutting blade Tangent to the outer circumferential surface of the piercing barrel, the edge of the bevel blade is set in a sharp edge shape;

A pressing member is detachably provided at the upper port of the cannula and is used to fix the state of an object placed in the cannula.

Optionally, the sampling device for drug residue detection in aquatic products also includes an auxiliary bevel blade, the upper end of the auxiliary bevel blade is fixed on the outer peripheral surface of the transition barrel, and the lower end of the auxiliary bevel blade is connected to the The bevel blade is connected, and the edge of the auxiliary bevel blade is set in a sharp edge shape.

Optionally, the maximum distance between the bevel blade and the auxiliary bevel blade and the center line of the cannula does not exceed the radius of the cannula.

Optionally, a step portion is provided on the inner peripheral surface of the transition cylinder along the circumferential direction of the transition cylinder.

Optionally, the pressing member includes:

insertion rod;

The barrel is inserted into the upper port of the cannula. The outer diameter of the barrel is close to the inner diameter of the cannula. At least one set of barrel inserts is provided on the side wall of the barrel. hole, each group of cylinder sockets is composed of two holes arranged coaxially; the intubation tube is provided with an intubation socket corresponding to the cylinder socket hole, so that the insertion rod penetrates the cylinder body and cannula;

A plurality of pressure blocks are arranged in the barrel, each pressure block is symmetrically distributed along the circumferential direction of the barrel, and the lower end of each pressure block is fixed on the inner peripheral surface of the barrel. The upper end of the block is inclined toward the center of the cylinder.

Optionally, the insertion rod includes a rod body, the rod body extends linearly between its first end and the second end, and the outer diameter of the rod body is close to the inner diameter of the barrel insertion hole and the cannula insertion hole;

A first anti-falling platform is provided on the outer peripheral surface of the first end of the rod body, and a second anti-loosing platform is provided on the outer peripheral surface of the second end of the rod body. The second end of the rod body is located along the axial direction of the rod body. A cutout is provided, and the second anti-falling platform is smoothly connected to the rod body.

Optionally, a scale is provided on the outer peripheral surface of the cannula along the axial direction of the cannula.

Optionally, the sampling device for detecting drug residues in aquatic products further includes a sample tube, the outer diameter of the sample tube is smaller than the inner diameter of the intubation tube, and the inner diameter of the sample tube is larger than the inner diameter of the piercing barrel.

Optionally, a through hole is provided on the side wall of the tube opening of the sample tube.

Optionally, the sampling device for detecting drug residues in aquatic products further includes a tube cap, which is buckled at the mouth of the sample tube and covers the through hole.

The beneficial effects of this application include but are not limited to:

The sampling device for detecting drug residues in aquatic products provided by the application of the present invention can obtain a regular columnar sample during the sampling process through the cooperation of the piercing barrel, the transition barrel and the intubation tube, which facilitates the estimation of the sample amount through the length of the sample. It can reduce the number of weighings in the subsequent testing process; during the sampling process, the cylindrical sample obtained can smoothly enter the sample tube placed in the intubation tube, and the sample does not need to be transferred twice, which avoids the sample from adhering to the inner wall of the sampling device and avoids The sample is subject to secondary contamination during the transfer process; in the entire sampling device, the intubation tube is the core part in contact with the fish body. When reusing, the intubation tube can be cleaned and disinfected, which is easy to operate.

Description of the drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 is a schematic structural diagram of a sampling device for detecting drug residues in aquatic products provided by the application of the present invention;

Figure 2 is a schematic longitudinal cross-sectional structural diagram of Figure 1;

Figure 3 is an enlarged structural schematic diagram of part B in Figure 2;

Figure 4 is a schematic structural diagram of the sampling device for detecting drug residues in aquatic products provided by the present invention after inserting a sample tube;

Figure 5 is a schematic cross-sectional structural diagram along the line A-A in Figure 1;

Figure 6 is a schematic structural diagram of a bevel blade and an auxiliary bevel blade in another embodiment of the present invention;

Figure 7 is an enlarged structural schematic diagram of the cylinder and the pressure block in the application of the present invention;

Figure 8 is an enlarged structural diagram of part C in Figure 2 with the insertion rod removed;

Figure 9 is an enlarged structural schematic diagram of the insertion rod in the application of the present invention;

Figure 10 is a schematic structural diagram of the sample tube in the application of the present invention;

Figure 11 is a schematic structural diagram of the sample tube and tube cover in the application of the present invention;

In the figure, 100, intubation; 101, intubation jack; 200, transition tube; 210, step part; 300, piercing tube; 400, sample tube; 410, through hole; 420, tube cover; 510, bevel cut Blade; 520, auxiliary bevel cutting blade; 610, cylinder; 611, cylinder socket; 612, handle; 620, pressing block; 630, insertion rod; 631, rod body; 632, first anti-falling platform; 633, No. 2. Anti-falling platform; 634, incision; 700, scale.

Detailed ways

In order to clearly explain the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

It should be noted that many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in Figures 1 to 3, the sampling device for detecting drug residues in aquatic products provided by the present application includes a cannula 100 and a detachable pressing member disposed at the upper port of the cannula 100, wherein the cannula 100 It has an upper port and a lower port arranged oppositely. The lower port of the cannula 100 is provided with a transition barrel 200 and a piercing barrel 300 that are coaxially arranged with the cannula 100. The outer diameter and inner diameter of the piercing barrel 300 are respectively smaller than the cannula 100. The transition barrel 200 is tapered, and the upper port of the insertion barrel 300 and the lower port of the cannula 100 are smoothly connected through the transition barrel 200 . The lower port of the piercing tube 300 is set in the shape of a sharp blade. When sampling, the sharp edge of the lower end of the piercing tube 300 pierces the fish body, and the cannula 100 can be pushed downward to insert the cannula 100 into the fish body smoothly. When the cannula 100 is inserted into the fish body, a columnar sample cut into regular shapes will be obtained.

During the sampling process of traditional sampling devices, the columnar sample will be squeezed directly into the cannula. When the sample enters the cannula, it will adhere to the inner wall of the cannula, and the sample needs to be taken out of the cannula and transferred to the sample tube. , inconvenient to operate.

In the sampling device provided by the present application, the interior of the intubation tube 100 is a cylindrical cavity for placing the sample tube 400 . As shown in Figure 4, before sampling, first insert the nozzle of the sample tube 400 downward into the intubation tube 100, so that the lower nozzle of the sample tube 400 is against the inner wall of the transition tube 200, and the sample tube 400 is fixed through the pressing member. Within the cannula 100. In addition, during the movement of the cannula, the transition tube 200 also plays a role in spreading the fish flesh so that the cannula with a larger outer diameter can be smoothly inserted into the fish body.

Since the outer diameter and the inner diameter of the piercing barrel 300 are respectively smaller than the outer diameter and the inner diameter of the cannula 100 , the outer diameter of the sample tube 400 is smaller than the inner diameter of the cannula 100 , and the inner diameter of the sample tube 400 is larger than the inner diameter of the piercing barrel 300 . Therefore, the outer diameter of the cylindrical sample obtained when the cannula 100 is pushed downward is smaller than the inner diameter of the sample tube 400 , and the cylindrical sample will advance smoothly in the sample tube 400 . After the sampling is completed, the sample remains in the sample tube 400 and can be stored or processed for next step of detection.

A columnar sample is obtained during the downward movement of the cannula 100. After obtaining a sample of required length, the movement of the cannula 100 is stopped. However, at this time, the root of the columnar sample is still connected to the fish body. Referring again to Figure 1, in order to separate the sample from the fish body so that the sample can be taken out of the fish body along with the cannula, the application of the present invention is provided with a bevel blade 510 on the outer periphery of the piercing barrel 300. Specifically, the bevel blade 510 is The lower end is fixed on the outer peripheral surface of the piercing barrel 300, the upper end is inclined in a direction away from the outer peripheral surface of the piercing barrel 300, and the edge of the bevel blade 510 is set in a sharp blade shape. Before pulling out the cannula from the fish body, turn the cannula vertically several times inside the fish body. During the rotation of the cannula, the oblique cutting blade 510 cuts the fish flesh around the bottom end of the cannula laterally, and then tilts the cannula outward and rotates it a few times to separate the bottom end of the columnar sample from the fish body. The purpose of first turning the cannula in the vertical position several times is to loosen the fish meat around the bottom of the cannula and weaken the connection between the bottom of the sample and the fish body.

The bevel blade 510 has a certain width. In order to reduce the resistance during its rotation, as shown in FIG. 5 , the present invention makes the blade surface of the bevel blade 510 tangent to the outer peripheral surface of the piercing barrel 300 . In addition, in order to reduce the resistance of the cannula 100 moving within the fish body, the plane where the bevel blade 510 is located should be parallel to the axial direction of the cannula.

Further, in order to facilitate the installation of the bevel blade 510, with reference to Figure 6, the sampling device provided by the present invention also includes an auxiliary bevel blade 520. The upper end of the auxiliary bevel blade 520 is fixed on the outer peripheral surface of the transition tube 200, and the auxiliary bevel blade 520 is The lower end of the blade 520 is connected to the bevel blade 510, and the edge of the auxiliary bevel blade 520 is set in a sharp edge shape. The auxiliary bevel blade 520 and the bevel blade 510 form an angular structure, which can improve the connection strength between the two and the cannula 100 and pierce the fish meat more smoothly. It can be understood that the blade surface of the auxiliary bevel blade 520 is tangent to the outer peripheral surface of the transition barrel 200, and the plane where the auxiliary bevel blade 520 is located should be parallel to the axial direction of the cannula.

In order to prevent the bevel blade 510 and the auxiliary bevel blade 520 from protruding from the periphery of the cannula 100 and causing the cannula 100 to be inconvenient for packaging or storage, in a preferred embodiment, the bevel blade 510 and the auxiliary bevel blade 520 are in contact with the cannula 100 The maximum distance from the 100 centerline does not exceed the 100 radius of the cannula.

Furthermore, in order to firmly press the sample tube 400 against the transition cylinder 200, a step portion 210 can be provided on the inner peripheral surface of the transition cylinder 200 along the circumferential direction of the transition cylinder 200.

In another specific embodiment, the pressing member includes a cylinder 610 that can be inserted into the upper port of the cannula 100. After the cylinder 610 is pressed on the top of the sample tube 400, the cylinder 610 and the cannula 100 are fixed by an insertion rod, that is, The sample tube 400 can be restrained within the cannula 100 and move with the cannula 100 .

After the sample tube 400 is inserted into the cannula 100, since its outer diameter is smaller than the inner diameter of the cannula 100, it is easy to fall inside the cannula 100. In order to fix the sample tube 400 and the intubation tube 100 coaxially, the present invention makes the two ends of the cylinder 610 open and disposes a plurality of pressure blocks 620 in the cylinder 610. Refer to Figure 7, each pressure block 620 is arranged along the cylinder. The pressure blocks 610 are distributed symmetrically in the circumferential direction, the lower end of each pressure block 620 is fixed on the inner peripheral surface of the cylinder 610 , and the upper end of each pressure block 620 is inclined in a direction close to the center of the cylinder 610 . When the sample tube 400 is inserted into the cannula 100, it will tilt. At this time, the cylinder 610 is inserted into the cannula 100, and the cylinder 610 moves downward along the inner wall of the cannula 100. During the downward movement of the cylinder 610, the sample tube 400 will follow. The slope of the pressing block 620 gradually becomes upright, and is finally pressed against the pressing block 620 in the cannula 100 . In order to conveniently take the cylinder 610, a handle 612 can be provided on the top thereof.

Further, referring to FIG. 8 , the outer diameter of the cylinder 610 is close to the inner diameter of the cannula 100 , and at least one set of cylinder sockets 611 is provided on the side wall of the cylinder 610 , and each group of cylinder sockets 611 is provided coaxially. It consists of two holes; the intubation tube 100 is provided with an intubation insertion hole 101 corresponding to the cylinder insertion hole 611, so that the insertion rod can penetrate the cylinder 610 and the intubation tube 100. The insertion rod 630 includes a rod body 631 that extends linearly between its first end and its second end. The outer diameter of the rod body 631 is close to the inner diameters of the barrel insertion hole 611 and the cannula insertion hole 101 . A first anti-falling platform 632 is provided on the outer circumferential surface of the first end of the rod body 631, a second anti-loose platform 633 is provided on the outer peripheral surface of the second end of the rod body 631, and a second end of the rod body 631 is provided along the axial direction of the rod body 631. The cutout 634, the second anti-separation platform 633 and the rod body 631 are smoothly connected. The cutout 634 allows the second end of the rod 631 to form a compressible structure, and the rod 631 can smoothly pass through the intubation insertion hole 101 or the barrel insertion hole 611 under the guidance of the arc surface of the second end of the rod 631.

In order to intuitively control the length of the sample during the sampling process, in a preferred embodiment, a scale 700 is provided on the outer circumferential surface of the cannula 100 along the axial direction of the cannula 100 to facilitate knowing the length of the obtained cylindrical sample.

If the lower port of the sample tube 400 is sealed against the inner peripheral surface of the transition tube 200, when the columnar sample enters the sample tube 400, the air in the sample tube 400 will not be eliminated. In order to solve this problem, as shown in Figure 10 , the present invention applies to a through hole 410 on the side wall of the nozzle of the sample tube 400. The gas is discharged between the intubation tube 100 and the sample tube 400 through the through hole 410, and leaves from the upper port of the intubation tube 100.

As shown in FIG. 11 , usually, the mouth of the sample tube 400 is blocked by a tube cap 420 . The tube cap 420 is buckled at the tube mouth of the sample tube 400 and covers the through hole 410 to seal and preserve the sample.

When testing the quality of fish, according to the distribution of aquaculture ponds and waters, reasonably arrange sampling points, randomly select samples from each batch, then remove part of the fish scales, tilt and clean, and then cut off the fish body. Through the application of the present invention The provided sampling device can be inserted into the fish body from the end face to take samples.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings and only It is intended to facilitate the description of the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two elements or an interaction between two elements . For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The above specific embodiments cannot be used to limit the scope of the invention. For those skilled in the art, any substitutions, improvements or transformations made to the embodiments of the invention fall within the scope of the invention.

Everything that is not described in detail in the present invention is a well-known technology for those skilled in the art.

Claims (8)

1. A sampling device for detecting drug residues in aquatic products, comprising:

the cannula is provided with an upper port and a lower port which are oppositely arranged, a transition cylinder and a penetrating cylinder which are coaxially arranged with the cannula are arranged at the lower port of the cannula, the outer diameter and the inner diameter of the penetrating cylinder are respectively smaller than the outer diameter and the inner diameter of the cannula, the transition cylinder is conical, the upper port of the penetrating cylinder is smoothly connected with the lower port of the cannula through the transition cylinder, and the lower port of the penetrating cylinder is sharp;

the lower end of the beveling blade is fixed on the outer circumferential surface of the penetrating cylinder, the upper end of the beveling blade is inclined in a direction away from the outer circumferential surface of the penetrating cylinder, the cutter surface of the beveling blade is tangent with the outer circumferential surface of the penetrating cylinder, and the edge of the beveling blade is in a sharp edge shape;

the compressing piece is detachably arranged at the upper port of the cannula and used for fixing the state of an object placed in the cannula;

the outer diameter of the sample tube is smaller than the inner diameter of the insertion tube, and the inner diameter of the sample tube is larger than the inner diameter of the penetrating cylinder;

the pressing member includes:

a rod;

the cylinder body is inserted into the upper port of the insertion pipe, the outer diameter of the cylinder body is close to the inner diameter of the insertion pipe, at least one group of cylinder body insertion holes are formed in the side wall of the cylinder body, and each group of cylinder body insertion holes consists of two coaxially arranged holes; the insertion pipe is provided with an insertion pipe insertion hole corresponding to the cylinder insertion hole so that the insertion rod penetrates through the cylinder and the insertion pipe;

the pressing blocks are arranged in the cylinder body, the pressing blocks are symmetrically distributed along the circumferential direction of the cylinder body, the lower ends of the pressing blocks are fixed on the inner circumferential surface of the cylinder body, and the upper ends of the pressing blocks incline towards the direction close to the center of the cylinder body.

2. The sampling device for detecting the residue of an aquatic product drug substance according to claim 1, further comprising an auxiliary bevel blade, wherein an upper end of the auxiliary bevel blade is fixed to an outer peripheral surface of the transition cylinder, a lower end of the auxiliary bevel blade is connected to the bevel blade, and an edge of the auxiliary bevel blade is provided in a sharp shape.

3. The sampling device for detecting the residual of an aquatic product drug substance according to claim 2, wherein the maximum distance between the bevel blade and the auxiliary bevel blade and the central line of the cannula does not exceed the radius of the cannula.

4. The sampling device for detecting residual of an aquatic product drug substance according to claim 1, wherein a stepped portion is provided on an inner peripheral surface of the transition cylinder in a circumferential direction of the transition cylinder.

5. The sampling device for detecting the residue of an aquatic product drug substance according to claim 1, wherein the insertion rod comprises a rod body extending in a straight line between a first end and a second end thereof, and an outer diameter of the rod body is close to an inner diameter of the cylinder insertion hole and the insertion tube insertion hole;

the first end outer peripheral surface of the rod body is provided with a first anti-drop table, the second end outer peripheral surface of the rod body is provided with a second anti-drop table, a notch is formed in the second end of the rod body along the axial direction of the rod body, and the second anti-drop table is smoothly connected with the rod body.

6. The sampling device for detecting the residual of an aquatic product drug substance according to claim 1, wherein graduations are provided on the outer peripheral surface of the insertion tube in the axial direction of the insertion tube.

7. The sampling device for detecting the residue of aquatic product medicines according to claim 1, wherein the side wall of the pipe orifice of the sample pipe is provided with a through hole.

8. The sampling device for detecting the residue of an aquatic product drug according to claim 7, further comprising a tube cover which is fastened at the tube opening of the sample tube and covers the through hole.