A portable sampler for beta-agonist detection

Abstract

The present invention specifically discloses a portable sampler for β-agonist detection. It includes a carrier, the carrier is provided with a carrier cavity, the carrier cavity is provided with a sealing boss; and a through-fitting, which is tubular, the interior of the through-fitting is provided with a penetrating detection hole, and one end of the through-fitting is connected to the carrier through a locking assembly; wherein, when the through-fitting is connected to the carrier, a sealing ring is filled between the sealing surface of the through-fitting and the sealing boss; wherein, a detachable sealing member is provided at the other end of the through-fitting. The present invention improves the portability of the sampler, and at the same time has an anti-counterfeiting function, which plays a role in protecting the sample.

Description

Technical Field

[0001] The invention relates to the technical field of food detection, and in particular to a portable sampler for beta-agonist detection. Background Art

[0002] Food safety is a hot topic in research in today's world. Food directly affects the health and even life of animals. Before use, food needs to pass experimental testing by relevant departments to ensure its safety when consumed.

[0003] Food testing has now become a hot emerging industry. Food testing mainly tests whether the toxic and harmful substances in food exceed the relevant standards to minimize food safety risks. Especially when athletes participate in sports events, the detection of β-agonists in food is particularly important to avoid cheating by athletes in sports events.

[0004] β-agonists are a type of drug used in humans and veterinary medicine to treat asthma. Overdose in livestock can convert the fat tissue of livestock into muscle tissue. Because they can significantly improve fat rate and production efficiency, β-agonists are often abused in livestock breeding production. In recent years, there have been reports of poisoning cases of salbutamol, tolbuterol, bromobuterol, clenbuterol, sibuterol, mabuterol, and terbutaline.

[0005] At present, the detection technologies of β-agonists mainly include chromatography technology and immunoassay technology. Chromatography technology is a classic technology, mainly including high performance liquid chromatography (HPLC), liquid chromatography-mass spectrometry (LC-MS), gas chromatography-mass spectrometry (GC-MS), high performance capillary electrophoresis (HPCE) and other methods. Chromatography technology is highly sensitive and accurate, but the sample processing is cumbersome and time-consuming, the cost is high, the required instruments and equipment are expensive, the sample amount for one test is small, the detection time is long, and specially trained professionals are required to operate complex instruments and equipment, which is not easy to popularize. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a portable sampler for β-agonist detection.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is a portable sampler for β-agonist detection, comprising:

[0008] A bearing member, wherein the bearing member is provided with a bearing cavity, and a sealing boss is provided in the bearing cavity; and

[0009] A through fitting is in a tubular shape, a through detection hole is provided inside the through fitting, and one end of the through fitting is connected to the bearing member through a locking assembly;

[0010] Wherein, when the through fitting is connected to the bearing member, a sealing ring is used to fill the space between the sealing surface of the through fitting and the sealing boss;

[0011] Wherein, the other end of the through fitting is provided with a detachable sealing member.

[0012] Preferably, the locking assembly comprises an elastic locking member located on the through fitting and a locking groove located on the inner wall of the bearing cavity;

[0013] Wherein, the elastic locking piece can be embedded in the locking groove.

[0014] Preferably, the elastic locking member comprises a locking block and an elastic member, a plurality of sliding cavities are provided on the side wall of the through fitting, the locking blocks are respectively arranged in the sliding cavities through the elastic members, and the bearing member can push the locking block in the sliding cavity to compress the elastic member to move;

[0015] Wherein, the locking blocks are all provided with an inclined surface -, and the openings of the bearing cavities are respectively provided with coupling surfaces matching with the inclined surface -.

[0016] Preferably, the elastic locking member comprises a stop block and an elastic arm, a swing cavity for the elastic locking member to swing is provided on the side wall of the through fitting, and the stop block protrudes from the outside of the swing cavity;

[0017] Wherein, the bearing member can push the stop block to compress the elastic arm to swing into the swing cavity.

[0018] Preferably, the through fitting is threadedly connected to the bearing cavity;

[0019] Wherein, the locking groove is annular, and the opening of the bearing cavity is trumpet-shaped.

[0020] Preferably, an extension ring is further provided at the end of the through fitting, the outer diameter of the extension ring is smaller than the outer diameter of the through fitting, and the transition between the extension ring and the through fitting forms the sealing surface;

[0021] When the through fitting is connected to the bearing member, a sealing gasket is used to fill the space between the outer side of the extension ring and the inner side of the sealing boss.

[0022] Preferably, the through fitting further comprises a filter element, the filter element is in an inverted cone shape, the surface of the filter element is distributed in filter holes, and the large diameter end of the filter element is fixedly connected to the extension ring;

[0023] A grinding cavity matched with the filter element is arranged in the bearing cavity, and grinding protrusions are distributed on the inner wall of the grinding cavity.

[0024] Preferably, a receiving cavity is further provided in the through fitting, the receiving cavity forms an opening on one side of the through fitting, the sealing member extends into the receiving cavity through the opening, and the sealing member completely covers the detection hole;

[0025] The sealing member and the accommodating cavity are sealed by a rubber ring.

[0026] Preferably, the sealing member comprises a handle and a plate body, the handle is located outside the through fitting, a sealing pad for sealing the opening is provided between the handle and the plate body; the rubber ring extends along the contour of the plate body;

[0027] Wherein, when the bearing member contacts the handle, the elastic locking member is embedded in the locking groove.

[0028] Preferably, the plate body includes a first plate body, a second plate body and a connecting belt connecting the first plate body and the second plate body, the first plate body is fixedly connected to the handle, and the connecting belt is made of soft material.

[0029] Preferably, a guide hole communicating with the accommodating cavity is further provided on a side of the through fitting away from the opening; a guide rod capable of extending into the guide hole is further provided on the second plate body, and the guide rod passes through the rubber ring.

[0030] Preferably, it further comprises a detection component, the detection component comprises a connecting piece and a detection test paper, the connecting piece is tubular, and the detection test paper is arranged in the connecting piece;

[0031] A connecting portion is further provided on one end of the through fitting away from the extension ring, and the connecting piece is connected to the connecting portion via threads.

[0032] Beneficial effects of the present invention:

[0033] When the present invention is used in a specific application, the food to be tested is placed in the carrying cavity, and then the through fitting is connected to the carrying member through the locking assembly. After being placed for a period of time, the sealing member can be opened, and the agonist test can be performed on the liquid to be tested in the carrying cavity through the test paper; at the same time, after the through fitting is connected to the carrying member, since the interior is sealed, the entire sampler can be moved to a suitable testing location for testing, thereby improving the portability of the sampler; at the same time, the locking assembly has an anti-disassembly function, which plays a role in protecting the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a preferred understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0035] Figure 1It is a structural schematic diagram of a portable sampler for β-agonist detection according to the present invention;

[0036] Figure 2 for Figure 1 Exploded diagram of

[0037] Figure 3 for Figure 1 A schematic cross-sectional view of the internal structure;

[0038] Figure 4 for Figure 3 A schematic diagram of the structure of the middle bearing member;

[0039] Figure 5 for Figure 3 Schematic diagram of the structure of the Zhongtong accessories;

[0040] Figure 6 for Figure 3 An enlarged schematic diagram of the middle locking assembly;

[0041] Figure 7 for Figure 6 Schematic diagram of the middle locking block compressing the elastic member to move in the sliding cavity;

[0042] Figure 8 It is a schematic diagram of the structure of another kind of accessories in a portable sampler for β-agonist detection;

[0043] Fig. 9 It is an enlarged schematic diagram of a locking component in another portable sampler for β-agonist detection;

[0044] Fig.10 for Fig. 9 Schematic diagram of the stop block compressing the elastic arm to move into the swing cavity;

[0045] Fig.11 It is a schematic diagram of the structure of a carrier in another portable sampler for β-agonist detection;

[0046] Fig.12 is an overall cross-sectional schematic diagram of another portable sampler for β-agonist detection;

[0047] Fig.13 for Figure 8 A three-dimensional schematic diagram of

[0048] Fig.14 is a schematic diagram of the overall structure of another portable sampler for β-agonist detection;

[0049] Fig.15 for Fig.14 Exploded diagram of

[0050] Fig.16is a schematic diagram of the structure of the seal;

[0051] Fig.17 is a cross-sectional schematic diagram of a sealing member located in the accommodating cavity;

[0052] Fig.18 for Fig.17 Explosion diagram of

[0053] Fig.19 The figure is a schematic diagram of the overall structure of a portable sampler for food agonist detection equipped with a detection component;

[0054] Fig. 20 A schematic diagram of the structure of the detection component. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] Example 1

[0057] See also Figure 1 to Figure 2 , which is the first embodiment of the present invention, and which provides a portable sampler for β-agonist detection, comprising a carrier 100 and a through fitting 200;

[0058] The carrier 100 is provided with a bearing cavity N1, the bearing cavity N1 is used to hold the food to be tested, and a sealing boss 110 is provided in the bearing cavity N1. The sealing boss 110 is a protrusion along the circumferential direction in the bearing cavity N1, and the upper surface of the sealing boss 110 is not higher than the opening of the bearing cavity N1;

[0059] The through-fitting 200 is tubular, and a through detection hole N2 is provided inside the through-fitting 200. The end of the through-fitting 200 can extend into the bearing cavity N1, and one end of the through-fitting 200 can establish a connection with the bearing member 100 through the locking assembly 300; wherein, when the through-fitting 200 is connected to the bearing member 100, the detection hole N2 is communicated with the bearing cavity N1, and the sealing surface 210 of the through-fitting 200 and the sealing boss 110 are filled by the sealing ring 120, and the sealing ring 120 is arranged on the sealing boss 110; wherein, a detachable sealing member 400 is provided at the other end of the through-fitting 200; that is, the connecting cavity formed by the bearing cavity N1 and the detection hole N2 is sealed by the sealing member 400 at one end and sealed by the sealing ring 120 at the other end, so as to form a complete sealed space.

[0060] In this embodiment, the sealing member 400 is an aluminum foil sheet glued to the end surface of the through fitting 200, and the aluminum foil sheet can be peeled off to expose the detection hole N2. At the same time, after the aluminum foil sheet is peeled off, it cannot be glued back to its original position, thereby protecting the sample, that is, it cannot be reused after peeling off. It can also prevent malicious contamination of the food to be tested in the carrying cavity N1, resulting in abnormal final detection results.

[0061] In specific application, the food to be tested, such as fresh pork, is placed in the carrying cavity N1, and pure water is added to the carrying cavity N1. Then, one end of the through-fitting 200 is extended into the carrying cavity N1, and a connection is established with the carrying member 100 through the locking assembly 300. After being placed for a period of time, the sealing member 400 can be opened, and the agonist test can be performed on the liquid to be tested in the carrying cavity N1 through the test paper; at the same time, after the through-fitting 200 is connected with the carrying member 100, since the interior is sealed, the entire sampler can be moved to a suitable testing location for testing.

[0062] Furthermore, the locking assembly 300 includes an elastic locking member 310 located on the through fitting 200 and a locking groove 320 located on the inner wall of the bearing cavity N1; wherein, the elastic locking member 310 can be embedded in the locking groove 320, and when the elastic locking member 310 on the through fitting 200 is embedded in the locking groove 320 on the inner wall of the bearing cavity N1, the through fitting 200 can be connected to the bearing 100.

[0063] It should be noted that the locking assembly 300 in this embodiment has an anti-disassembly function, that is, after the through fitting 200 is connected to the carrier 100, the through fitting 200 and the carrier 100 cannot be separated, thereby protecting the sample.

[0064] Example 2

[0065] See also Figures 2 to 4 This embodiment is different from the first embodiment in that an extension ring 230 is further provided at the end of the through fitting 200, the outer diameter of the extension ring 230 is smaller than the outer diameter of the through fitting 200, the detection hole N2 passes through the extension ring 230, and a sealing surface 210 is formed at the transition between the extension ring 230 and the through fitting 200; when the through fitting 200 is connected to the carrier 100, the outer side of the extension ring 230 and the inner side of the sealing boss 110 are filled with a sealing gasket 240, and the sealing gasket 240 is arranged on the outer wall of the extension ring 230.

[0066] After the through fitting 200 of the present embodiment is connected to the bearing member 100 , the bearing cavity N1 is double-sealed by the sealing gasket 240 and the sealing ring 120 , thereby greatly improving the sealing effect.

[0067] Example 3

[0068] See also Figures 2 to 7, this embodiment is different from the above-mentioned embodiment in that the elastic locking member 310 of this embodiment includes a locking block 311a and an elastic member 312a, a plurality of sliding cavities 220a are provided on the side wall of the through-fitting part 200, and the sliding cavities 220a are evenly distributed along the circumference of the through-fitting part 200, and the locking blocks 311a are respectively arranged in the sliding cavities 220a through the elastic members 312a, and under the pre-tightening force of the elastic members 312a, the locking blocks 311a protrude from the outer surface of the through-fitting part 200, and the bearing member 100 can push the locking block 311a to compress the elastic member 312a in the sliding cavity 220a to move, and the locking block 311a can be completely hidden in the sliding cavity 220a;

[0069] Among them, the locking blocks 311a are all provided with an inclined surface 311a-1, and the inclined surface 311a-1 faces downward. The openings of the carrying cavity N1 are respectively provided with coupling surfaces 130 that match the inclined surface 311a-1. When one end of the through-fitting 200 is inserted into the carrying cavity N1, after the coupling surface 130 is in contact with the inclined surface 311a-1, the locking block 311a can be pushed to compress the elastic member 312a to move in the sliding cavity 220a under the action of the inclined surface until the locking block 311a is completely hidden in the sliding cavity 220a. When the locking groove 320 reaches the locking block 311a, the elastic member 312a pushes the locking block 311a to reset until the locking block 311a is extended into the locking groove 320, so that the through-fitting 200 and the carrying component 100 can be connected. Moreover, after the connection, there is no inclined surface above the locking block 311a, which can play an anti-disassembly function and protect the sample.

[0070] Example 4

[0071] See also Figures 8 to 10 , this embodiment is different from the above embodiment in that the elastic locking member 310 of this embodiment includes a stop block 311b and an elastic arm 312b, a swing cavity 220b for the elastic locking member 310 to swing is provided on the side wall of the through fitting 200, the stop block 311b protrudes from the outside of the swing cavity 220b, the elastic arm 312b is tilted as a whole, the top of the elastic arm 312b is tilted toward the outside of the swing cavity 220b, the stop block 311b is located at the top of the elastic arm 312b, and under the action of external force, the stop block 311b can be pushed to compress the elastic arm 312b and move into the swing cavity 220b until the stop block 311b completely enters the swing cavity 220b, wherein the upper and lower edges of the stop block 311b are in an arc-shaped transition;

[0072] Insert one end of the through fitting 200 into the bearing cavity N1. When the stop block 311b contacts the top of the bearing member 100, it continues to move downward. The bearing member 100 can push the stop block 311b to compress the elastic arm 312b to swing into the swing cavity 220b until the stop block 311b completely enters the swing cavity 220b and continues to move downward.

[0073] Among them, the supporting component 100 can push the stop block 311b to compress the elastic arm 312b to swing into the swing cavity 220b. When the locking groove 320 reaches the stop block 311b, the elastic arm 312b pushes the stop block 311b to reset until the stop block 311b extends into the locking groove 320, so that the through-hole 200 and the supporting component 100 can be connected. After the connection, when you want to disassemble it downward, because the top of the elastic arm 312b is inclined toward the outside of the swing cavity 220b, it is impossible to push the stop block 311b to move into the swing cavity 220b, which can play an anti-disassembly function and protect the sample.

[0074] Example 5

[0075] See also Figure 11 to Figure 12 This embodiment is different from the above-mentioned embodiment in that the through fitting 200 is threadedly connected to the bearing cavity N1; wherein the locking groove 320 is annular, and the opening of the bearing cavity N1 is trumpet-shaped, that is, the trumpet shape formed by the coupling surface 130 extending along the circumferential direction; wherein the bearing component 100 is also provided with a rotating handle 150 for facilitating the rotation operation.

[0076] In this embodiment, the elastic locking member 310 is preferably the structure in Embodiment 4. At this time, after one end of the through fitting 200 is inserted into the bearing cavity N1, the bearing member 100 is rotated to move the through fitting 200 into the bearing cavity N1. When the trumpet-shaped locking groove 320 contacts the stop block 311b, as the bearing member 100 continues to rotate, the stop block 311b can be simultaneously pushed to compress the elastic arm 312b and move into the swing cavity 220b until the stop block 311b is stuck in the locking groove 320 to complete the installation.

[0077] Example 6

[0078] See also Figure 12 to Figure 13 , this embodiment is different from the above embodiment in that the through-fitting 200 also includes a filter 250, the filter 250 is in an inverted cone shape, the surface of the filter 250 is distributed in the filter holes 251, and the large diameter end of the filter 250 is fixedly connected to the extension ring 230; a grinding chamber N3 matched with the filter 250 is provided in the bearing cavity N1, and the inner wall of the grinding cavity N3 is distributed with grinding protrusions 140, and a grinding gap is left between the grinding protrusions 140 and the surface of the filter 250. The food to be tested is placed in the grinding chamber N3, and after adding pure water, the filter 250 of the through-fitting 200 is extended into the grinding chamber N3, and the bearing 100 is rotated to move the through-fitting 200 into the bearing cavity N1, and the distance between the grinding protrusion 140 and the surface of the filter 250 is gradually shortened. During the rotation of the bearing 100, the grinding protrusion 140 gradually grinds the food to be tested, which can fully release the agonist inside the food to be tested and ensure the accuracy of the detection.

[0079] Example 7

[0080] See also Figures 14 to 18 , this embodiment is different from the above-mentioned embodiment in that the top and bottom of the through-fitting 200 are both open, and a receiving chamber N4 is further provided in the middle of the through-fitting 200. The receiving chamber N4 forms an opening on one side of the through-fitting 200, and the sealing member 400 extends into the receiving chamber N4 through the opening, and the sealing member 400 completely covers the detection hole N2; the sealing member 400 and the receiving chamber N4 are sealed by a rubber ring 410. When the bottom of the through-fitting 200 extends into the bearing chamber N1 and establishes a connection with the bearing member 100, although the bearing chamber N1 is connected with the detection hole N2, the sealing member 400 and the rubber ring 410 can realize the sealing in the bearing chamber N1. When the sealing member 400 is taken out from the receiving chamber N4, the detection test paper can be extended from the top of the through-fitting 200 into the bearing chamber N1 to complete the detection.

[0081] Specifically, the sealing member 400 includes a handle 420 and a plate 430. The handle 420 is located outside the through fitting 200. A sealing pad 440 for sealing the opening is provided between the handle 420 and the plate 430. The plate 430 extends into the accommodating cavity N4 and can completely cover the detection hole N2. The opening of the accommodating cavity N4 is sealed by the sealing pad 440 to achieve sealing at the opening. The rubber ring 410 extends along the contour of the plate 430, and the rubber ring 410 seals the space on both sides of the plate 430 in the detection hole N2.

[0082] Among them, the plate body 430 includes a first plate body 431, a second plate body 432 and a connecting belt 433 connecting the first plate body 431 and the second plate body 432. The first plate body 431 is fixedly connected to the handle 420, and the connecting belt 433 is made of soft material, that is, the connecting belt 433 can provide pulling force but cannot provide pushing force. After the plate body 430 is taken out from the accommodating cavity N4 as a whole, the plate body 430 cannot be installed into the accommodating cavity N4 again. The second plate body 432 is extended into the accommodating cavity N4 from the opening. Since the connecting belt 433 cannot provide pushing force, even if the first plate body 431 is forcibly extended into the accommodating cavity N4 through the handle 420, the second plate body 432 cannot be pushed to the original sealing position. Therefore, this scheme can play an anti-counterfeiting role, that is, the plate body 430 cannot be installed again after being taken out, which plays a role in protecting the sample and preventing the sample from being contaminated and affecting the detection effect.

[0083] Furthermore, a guide hole N5 connected to the accommodating cavity N4 is provided on the side of the through fitting 200 away from the opening; a guide rod 450 capable of extending into the guide hole N5 is provided on the second plate body 432, and the guide rod 450 passes through the rubber ring 410. During manufacturing, the length of the guide rod 450 is greater than the diameter of the through fitting 200. The guide rod 450 is extended from the opening of the accommodating cavity N4 until it extends out of the guide hole N5, and the guide rod 450 is pulled from outside the guide hole N5 until the second plate body 432 and the first plate body 431 are sequentially pulled into the accommodating cavity N4 until the sealing installation is completed, and then the guide rod 450 is broken at the surface of the through fitting 200 to achieve the above-mentioned anti-counterfeiting purpose.

[0084] Furthermore, in order to fully utilize the function of the seal 400, since the seal 400 is pre-installed on the through fitting 200, when connecting the carrier 100 and the through fitting 200, the carrier 100 is rotated until the carrier 100 contacts the handle 420, and the elastic locking member 310 is just embedded in the locking groove 320, which is more convenient for installation.

[0085] Example 8

[0086] See also Figures 14 to 18 , this embodiment is different from the above embodiment in that this embodiment is further equipped with a detection assembly 500, the detection assembly 500 includes a connecting member 510 and a detection test paper 520, the connecting member 510 is tubular, and the detection test paper 520 is arranged in the connecting member 510; the end of the through fitting 200 away from the extension ring 230 is further provided with a connecting portion 260, and the connecting member 510 is connected to the connecting portion 260 by a thread;

[0087] On the basis of Example 7, the detection assembly 500 can be pre-installed on the through fitting 200, and the connecting member 510 can be rotated and installed until the connecting member 510 contacts the handle 420 of the sealing member 400. At this time, the detection paper 520 in the connecting member 510 is located in the detection hole N2, but is sealed and isolated by the sealing member 400, and the detection paper 520 will not enter under the detection hole N2;

[0088] After sampling, the through fitting 200 is installed on the carrier 100, the sealing member 400 is removed, and the connecting member 510 is rotated until the connecting member 510 contacts the carrier 100. At this time, the test paper 520 in the connecting member 510 enters the bearing cavity N1 and contacts the liquid to be detected. After a period of contact, the connecting member 510 is rotated in the opposite direction to make the test paper 520 leave the liquid to be detected. After standing for a period of time, the condition of the test paper 520 is observed from the observation port 512 to determine whether the agonist test is positive or negative.

[0089] The connecting member 510 is provided with a rotating portion 513 for easy rotation operation, and the connecting member 510 is provided with a mounting groove 511 for installing the test paper 520. The test paper 520 is equipped with a mounting block 521. The test paper 520 can be installed in the mounting groove 511 through the mounting block 521, and the test paper 520 can also be taken out through the mounting block 520.

[0090] In order to be able to detect multiple agonists at one time, especially common β-agonists in food, such as clenbuterol, salbutamol, ractopamine, terbutaline, mabuterol, tolbuterol, etc., a plurality of mounting grooves 511 are evenly distributed along the circumference of the connecting piece 510, and a plurality of different types of test strips 520 can be installed at the same time. The connecting piece 510 is also correspondingly provided with a plurality of observation ports 512 to achieve simultaneous detection.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable sampler for β-agonist detection, characterized in that: include, A bearing member, wherein the bearing member is provided with a bearing cavity, and a sealing boss is provided in the bearing cavity; and A through fitting is in a tubular shape, a through detection hole is provided inside the through fitting, and one end of the through fitting is connected to the bearing member through a locking assembly; Wherein, when the through fitting is connected to the bearing member, a sealing ring is used to fill the space between the sealing surface of the through fitting and the sealing boss; Wherein, a detachable sealing member is provided at the other end of the through fitting; Wherein, the locking assembly comprises an elastic locking member located on the through fitting and a locking groove located on the inner wall of the bearing cavity; Wherein, the elastic locking member can be embedded in the locking groove; Wherein, the elastic locking member comprises a stop block and an elastic arm, a swing cavity for the elastic locking member to swing is provided on the side wall of the through fitting, and the stop block protrudes from the outside of the swing cavity; Wherein, the bearing member can push the stop block to compress the elastic arm to swing into the swing cavity.

2. A portable sampler for β-agonist detection as claimed in claim 1, characterized in that: An extension ring is also provided at the end of the through fitting, the outer diameter of the extension ring is smaller than the outer diameter of the through fitting, and the transition between the extension ring and the through fitting forms the sealing surface; When the through fitting is connected to the bearing member, a sealing gasket is used to fill the space between the outer side of the extension ring and the inner side of the sealing boss.

3. A portable sampler for β-agonist detection as claimed in claim 2, characterized in that: The through fitting is threadedly connected to the bearing cavity; Wherein, the locking groove is annular, and the opening of the bearing cavity is trumpet-shaped.

4. A portable sampler for β-agonist detection as claimed in claim 3, characterized in that: The through-fitting also includes a filter element, the filter element is in an inverted cone shape, the surface of the filter element is distributed in filter holes, and the large diameter end of the filter element is fixedly connected to the extension ring; A grinding cavity matched with the filter element is arranged in the bearing cavity, and grinding protrusions are distributed on the inner wall of the grinding cavity.

5. A portable sampler for β-agonist detection as claimed in claim 4, characterized in that: The through fitting is further provided with a receiving cavity, wherein the receiving cavity forms an opening on one side of the through fitting, and a sealing member extends into the receiving cavity through the opening, and the sealing member completely covers the detection hole; The sealing member and the accommodating cavity are sealed by a rubber ring.

6. A portable sampler for β-agonist detection as claimed in claim 5, characterized in that: The sealing member comprises a handle and a plate body, wherein the handle is located outside the through fitting, and a sealing pad for sealing the opening is provided between the handle and the plate body; the rubber ring extends along the contour of the plate body; Wherein, when the bearing member contacts the handle, the elastic locking member is embedded in the locking groove.

7. A portable sampler for β-agonist detection as claimed in claim 6, characterized in that: The plate body includes a first plate body, a second plate body and a connecting belt connecting the first plate body and the second plate body. The first plate body is fixedly connected to the handle, and the connecting belt is made of soft material.

8. A portable sampler for β-agonist detection as claimed in claim 7, characterized in that: A guide hole communicating with the accommodating cavity is further provided on the side of the through fitting away from the opening; a guide rod capable of extending into the guide hole is further provided on the second plate body, and the guide rod passes through the rubber ring.

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