A portable sample detection device

Abstract

The application provides a portable sample detection device, which comprises a sampler, a detection shell, a bottom support and a detection reagent. The sampler comprises a sampling rod and an end cap. The end cap is connected with the head end of the sampling rod. The tail end wall of the sampling rod is provided with a plurality of inner grooves. The inner grooves are inclined downward from outside to inside along the radial direction of the sampling rod. The detection shell comprises an inner sleeve and an outer shell. The inner sleeve is embedded in the outer shell, and the gap between the inner sleeve and the outer shell forms a containing cavity. The sampling rod extends from the top of the detection shell to the inside of the inner sleeve. The bottom support is sealingly connected with the bottom of the outer shell and is in communication with the bottom end of the inner sleeve. A quantitative cavity is arranged on the top of the bottom support and directly below the containing cavity. The detection reagent is installed in the containing cavity of the detection shell and extends to the quantitative cavity of the bottom support. The sampling rod with the inner grooves is used for sampling, so that more samples are retained as much as possible, and the empty sampling condition is avoided. In addition, the solid sample can be sampled, and the liquid sample can also be sampled, so that the device has the multiple use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sample detection, in particular to a portable sample detection device. BACKGROUND

[0002] At present, the detection technology of immunology medicine is very popular, and the main detection sample types are blood, feces, throat swabs and skin tissues. Among them, the collection and detection of feces sample type is the weakest link in the development of the industry, and the main reason is that the feces sample has the need for privacy during sampling, the sample itself has poor appearance and environment, which brings some unnecessary troubles to the testers during the collection and subsequent detection of the sample.

[0003] The current detection device is divided into two categories. One is a traditional detection device, which is composed of a fecal collector, a reagent card and a diluent. When using the device, it is easy to leak and contaminate when using the fecal collector to collect feces. During the use of diluent and the final sample adding process, many inconvenient factors are generated. In particular, the user is repelled by the feces sample, and the operation steps cannot be completely unified during operation. In addition, the difference in proficiency and product understanding between different operators easily causes inaccurate detection results.

[0004] The other is the integration of sampling and detection, which is mainly composed of a sample mixing bin and a reagent bin. However, it can only realize the treatment of the sample by one diluent or one pretreatment liquid. During use, it has many limitations. For example, it cannot use two treatment liquids to treat the sample. In addition, although the integrated design avoids the unpleasant experience of the operator during use to a certain extent, reduces the complexity of the operation of the traditional detection device, and simplifies the detection steps, the sample collection is crucial. The inaccuracy of sample collection and the difference in detection liquid content also affect the accuracy of reagent detection. If the collected sample amount is not enough or there is empty collection during the sampling process, it will directly cause the error or failure of the detection result. SUMMARY

[0005] Therefore, it is necessary to provide a portable sample detection device in view of the problem that the current integrated detection device cannot accurately collect effective samples.

[0006] To achieve the above purpose, the following technical solutions are adopted in the present application.

[0007] A portable sample detection device, comprising a sampler, a detection shell, a bottom support and a detection reagent.

[0008] The sampler comprises a sampling rod and an end cap. The diameter of the end cap is greater than that of the sampling rod and is integrated with the leading end of the sampling rod. The trailing end wall of the sampling rod is provided with a plurality of inner grooves, and the inner grooves are inclined downward along the radial direction of the sampling rod from outside to inside.

[0009] The detection shell comprises an inner sleeve and an outer shell; the inner sleeve is embedded in the outer shell, and a gap between the inner sleeve and the outer shell forms a containing cavity; the inner sleeve has a processing liquid for processing a sample, and a sampling rod extends from the top of the detection shell to the inside of the inner sleeve.

[0010] The bottom support is sealingly connected to the bottom of the outer shell and communicates with the bottom end of the inner sleeve, and a quantitative cavity is arranged at the top of the bottom support and directly below the containing cavity.

[0011] The detection reagent is arranged in the containing cavity of the detection shell and extends to the quantitative cavity of the bottom support.

[0012] Further, the inner sleeve comprises a first sleeve and a second sleeve; the first sleeve and the second sleeve are sealingly connected end to end, the inner wall of the first sleeve is sequentially connected from top to bottom with a first sealing member, a second sealing member and a third sealing member, and the inner cavity of the first sleeve is sequentially divided into a residual sample cavity, a first liquid cavity and a second liquid cavity; the third sealing member and the inner cavity of the second sleeve form a liquid distribution cavity at the bottom, and the second sleeve communicates with the quantitative cavity of the bottom support.

[0013] Further, the first liquid cavity is provided with a fourth sealing member inside, and the second liquid cavity is provided with a fifth sealing member inside, so as to respectively divide the first liquid cavity and the second liquid cavity into two part cavities.

[0014] Further, the quantitative cavity of the bottom support is provided with a liquid discharge port at the top of the side portion, a waste liquid cavity is formed between the bottom support, the second sleeve and the outer shell and communicates with the liquid discharge port, and the waste liquid cavity communicates with the quantitative cavity through the liquid discharge port.

[0015] Further, the second sleeve is snap-connected with the bottom support, and the liquid distribution cavity of the second sleeve is provided with a liquid distribution hole corresponding to the quantitative cavity.

[0016] Further, the outer peripheral surface of the end cap is provided with an annular groove, the annular groove is snap-connected with a first limiting block and a second limiting block respectively, the first limiting block is located above the second limiting block, the outer wall surface of the first limiting block and the second limiting block extends to the outside of the annular groove, and the second limiting block is in contact with the top end of the outer shell, the first limiting block and the second limiting block are used for blocking the movement of the tail end of the sampling rod to the second liquid cavity, and the second limiting block is used for blocking the movement of the tail end of the sampling rod to the liquid distribution cavity.

[0017] Further, the outer peripheral surface of the end cap is embedded with a sealing ring, the sealing ring is located below the annular groove and in the gap between the end cap and the inner wall of the first sleeve.

[0018] Further, the first sealing member comprises a rubber ring and a film layer; the outer peripheral surface of the rubber ring is sealingly connected with the first sleeve, the inner diameter of the rubber ring is larger than the diameter of the sampling rod, and the surface of the rubber ring is fixedly connected with the film layer sealing the inner ring thereof.

[0019] Further, the middle section of the sampling rod is provided with an annular protrusion matched with the inner diameter of the rubber ring, and the bottom of the tail end of the sampling rod is gradually reduced in diameter from top to bottom, in a conical shape.

[0020] Further, the plurality of inner grooves distributed axially along the sampling rod are a group, and a plurality of groups of inner grooves are distributed in an annular manner on the outer peripheral surface of the sampling rod.

[0021] Compared with the prior art, the beneficial effects of the present application include:

[0022] 1. The sampling rod with the inner groove is used for sampling in the present application, which can retain the sample in the inner groove during sampling, thereby retaining more samples as much as possible and avoiding empty sampling. In addition, the design of the inner groove can not only sample solid samples, but also sample liquid samples, which has versatility.

[0023] 2. The cavity in the inner sleeve is divided into a residual sample cavity, a first liquid cavity, a second liquid cavity and a liquid distribution cavity in the present application, which can not only perform one-step detection, but also perform two-step detection. The two liquid cavities accommodate different processing liquids for two-step detection, thereby expanding the application range of detection.

[0024] 3. The first liquid cavity and the second liquid cavity are divided into upper and lower cavities in the present application, which can make the liquid in the upper cavity fully contact and mix with the sample when flowing into the lower cavity, thereby effectively detecting.

[0025] 4. The present application discharges more than liquid through the liquid discharge port in the quantitative cavity, ensures that the liquid in the quantitative cavity is a constant value, and improves the detection accuracy of the detection reagent in contact with the liquid in the quantitative cavity.

[0026] 5. The first limiting block and the second limiting block are arranged to limit the movement range of the sampler in the inner sleeve, so that the sampler can move to the required position and perform corresponding operations without the need for manual observation of the movement position of the sampler.

[0027] 6. The detection reagent is embedded into the accommodation cavity of the shell and the inner sleeve in the present application, which does not affect the storage of the processing liquid, and can contact the sample liquid in the quantitative cavity for detection, thereby avoiding the contact of the operator with the sample liquid as much as possible. In addition, a plurality of quantitative cavities can be arranged to cooperate with a plurality of detection reagents to detect multiple items, so that multiple items can be detected at one time, thereby reducing the complexity of detection operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. Among them:

[0029] Figure 1 It is a perspective view of a convenient sample detection device according to the present application.

[0030] Figure 2 is a front view based on Figure 1 ;

[0031] Figure 3 is a sectional view based on Figure 2 A-A view;

[0032] Figure 4 is a sectional view based on Figure 2 B-B view;

[0033] Figure 5 is a sectional view based on Figure 2 C-C view;

[0034] Figure 6 is a schematic view of the connection between the inner sleeve, the sampler and the base support based on Figure 1 ;

[0035] Figure 7 is a sectional view without the first and second limit blocks based on Figure 3 ;

[0036] Figure 8 is a schematic view of the structure of the first seal based on Figure 7 ;

[0037] Figure 9 is a schematic view of the structure of the sampler based on Figure 6 ;

[0038] Figure 10 is a schematic view of the connection between the base support and the second sleeve based on Figure 6 ;

[0039] Figure 11 is a schematic view of the structure of the base support based on Figure 10 .

[0040] Legend in the figure: 1, sampler; 11, sampling rod; 12, end cap; 13, inner groove; 14, sealing ring; 2, detection shell; 21, inner sleeve; 211, first sleeve; 212, second sleeve; 213, residual sample cavity; 214, first liquid cavity; 215, second liquid cavity; 216, liquid separation cavity; 217, liquid separation hole; 22, outer shell; 23, first seal; 231, rubber ring; 232, film layer; 24, second seal; 25, third seal; 26, fourth seal; 27, fifth seal; 3, base support; 31, quantitative cavity; 32, liquid discharge port; 33, waste liquid cavity; 4, detection reagent; 5, first limit block; 6, second limit block. DETAILED DESCRIPTION

[0041] It is easy to understand that according to the technical solutions of the present application, those skilled in the art can propose various structures and implementation manners that can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solutions of the present application, and should not be regarded as the whole or as the limitation or restriction of the technical solutions of the present application.

[0042] Please refer to Figure 1 and Figure 6 , the embodiment introduces a portable sample detection device, mainly including a sampler 1, a detection shell 2, a bottom support 3 and a detection reagent 4. Combined with Figure 6 and Figure 9 , the sampler 1 mainly includes a sampling rod 11 and an end cap 12. The diameter of the end cap 12 is greater than that of the sampling rod 11 and is integrated with the leading end of the sampling rod 11. The end cap 12 is preferably cylindrical. The trailing end wall of the sampling rod 11 is provided with a plurality of inner grooves 13, and the inner grooves 13 are inclined downward along the radial direction of the sampling rod 11. Therefore, the sampling rod 11 can accommodate the sample during sampling, which not only reduces the possibility of sample falling, but also reduces the possibility of empty sampling. The sampling rod 11 with the inner grooves 13 can not only sample solid samples, but also sample liquid samples. In order to facilitate all-around sampling, a plurality of inner grooves 13 spaced along the axial direction of the sampling rod 11 can be regarded as a group, and a plurality of groups of inner grooves 13 are distributed in a ring shape on the outer peripheral surface of the sampling rod 11, which can sample at multiple angles and improve the success rate of sampling.

[0043] In order to facilitate the cooperation of the sampling rod 11 and the detection shell 2, a ring-shaped protrusion is arranged at the middle part of the sampling rod 11, the diameter of the ring-shaped protrusion is smaller than that of the end cap 12, which does not affect the entry of the sampling rod 11 into the detection shell 2, but plays a certain blocking role when the sampling rod 11 enters the detection shell 2. The trailing end bottom of the sampling rod 11 is conical, and the diameter gradually decreases from one end close to the main body of the sampling rod 11 to the outside, which facilitates the movement of the sampling rod 11 in the detection shell 2 and the puncture of the corresponding barrier.

[0044] Please refer to Figure 2 and Figure 6 , the detection shell 2 mainly includes an inner sleeve 21 and an outer shell 22. The inner diameter of the inner sleeve 21 is greater than that of the sampling rod 11 and the end cap 12, so that the end cap 12 can also enter the inner sleeve 21. It can be preferred that the outer shell 22 adopts a rectangular shell, and the inner sleeve 21 adopts a cylindrical shape. The inner sleeve 21 can be embedded in the outer shell 22, and there is a gap between the inner sleeve 21 and the outer shell 22, and a containing cavity for containing the detection reagent 4 is formed in the gap.

[0045] The inner sleeve 21 will be described in detail below. Combined with Figure 3 and Figure 7It can be known that the inner sleeve 21 is mainly divided into a first branch sleeve 211 and a second branch sleeve 212, and the first branch sleeve 211 and the second branch sleeve 212 are sealed and connected at the head and tail. The first branch sleeve 211 is located above the second branch sleeve 212, and the sampler 1 can enter the second branch sleeve 212 from the first branch sleeve 211. The inside of the first branch sleeve 211 is divided into a residual sample cavity 213, a first liquid cavity 214 and a second liquid cavity 215 by a first sealing piece 23, a second sealing piece 24 and a third sealing piece 25. The third sealing piece 25 is located at the bottom end of the first branch sleeve 211, and the inner cavity of the second branch sleeve 212 is not communicated with the first branch sleeve 211 due to the division of the third sealing piece 25, and the inner cavity of the second branch sleeve 212 forms a liquid distribution cavity 216. Therefore, the inner cavity of the first inner sleeve 21 is sequentially formed by the residual sample cavity 213, the first liquid cavity 214 and the second liquid cavity 215 from top to bottom, and the inner cavity of the second inner sleeve 21 forms the liquid distribution cavity 216.

[0046] The first sealing piece 23, the second sealing piece 24 and the third sealing piece 25 can be the same structure or different structures, but the center of each of the first sealing piece 23, the second sealing piece 24 and the third sealing piece 25 is provided with a film layer 232 capable of being punctured by the sampling rod 11. Taking the first sealing piece 23 as an example, please refer to Figure 8 The first sealing piece 23 mainly includes a rubber ring 231 and a film layer 232. The outer peripheral surface of the rubber ring 231 is in sealed connection with the first branch sleeve 211, and the inner diameter of the rubber ring 231 is larger than the diameter of the sampling rod 11, so that the rubber ring 231 does not block the sampling rod 11. The surface of the rubber ring 231 is fixedly connected with the film layer 232 sealing the inner circle thereof. The film layer 232 plays a role in separating the residual sample cavity 213 and the first liquid cavity 214, so that they are not communicated. Only when the film layer 232 is punctured by the sampling rod 11 can the two cavities be communicated. The material of the film layer 232 can be a plastic film, or a material capable of playing the same role as the plastic film.

[0047] The second seal 24 and the third seal 25 have the same effect as the first seal 23 and do not block the sampling rod 11 from passing through and puncturing the film layer at the center. Taking the second seal 24 and the third seal 25 as an example, the structure of the first seal 23 is the same. When the sampling rod 11 passes through the first seal 23 and the tail end is located in the first liquid cavity 214, the annular protrusion of the sampling rod 11 is located at the inner diameter of the rubber ring 231, which serves to separate the residual sample cavity 213 and the first liquid cavity 214 again, and as much as possible to avoid liquid leakage from the first liquid cavity 214 to the residual sample cavity 213. Similarly, when the sampling rod 11 passes through the second seal 24 into the second liquid cavity 215, and passes through the third seal 25 into the liquid separation cavity 216, the annular protrusion can play the same role, as much as possible to avoid liquid from the top of the inner sleeve 21. In order to further improve the sealing effect and prevent the sampling liquid from flowing out of the top of the inner sleeve 21, the outer peripheral surface of the end cap 12 located in the first sleeve 211 is embedded with a sealing ring 14 to close the gap between the outer peripheral surface of the end cap 12 and the inner wall surface of the first sleeve 211.

[0048] In combination Figure 3 In order to limit the movement range of the sampling rod 11 in the inner sleeve 21, an annular groove is formed on the outer peripheral surface of the end cap 12, and the first limiting block 5 and the second limiting block 6 are respectively clamped in the annular groove. The first limiting block 5 is located above the second limiting block 6. The first limiting block 5 and the second limiting block 6 are clamped in a staggered manner, so that the clamping of the second limiting block 6 will not be affected when the first limiting block 5 is removed. It should be noted that the first liquid cavity 214 and the second liquid cavity 215 are used to cooperate with the colloidal gold and fluorescent chromatography immunoassay test technology to perform two-step detection. Therefore, the two limiting blocks limit the movement of the sampling rod 11 to the corresponding position and cannot be moved. If only one-step detection is used, only one limiting block is needed, and the size can be directly selected as the size of the combination of the first limiting block 5 and the second limiting block 6.

[0049] In addition, it is emphasized that, since the first limiting block 5 and the second limiting block 6 are used to limit the activity of the sampler 1, the tail end of the end cap 12 can enter the inner sleeve 21, but the outer dimensions of the first limiting block 5 and the second limiting block 6 are greater than the end cap 12, which is blocked by the shell 22 and cannot enter the inner sleeve 21, so that the first limiting block 5 and the second limiting block 6 can play a blocking role, and the height of the first limiting block 5 and the second limiting block 6 corresponds to the distribution of the cavity inside the inner sleeve 21, so as to cooperate with each other. In actual operation, the first limiting block 5 and the second limiting block 6 jointly block the tail end of the sampling rod 11 from breaking the second sealing element 24 and continuing to move towards the second liquid cavity 215. If the first limiting block 5 is removed and only the second limiting block 6 is retained, the tail end of the sampling rod 11 can be blocked from breaking the third sealing element 25 and continuing to move towards the liquid separation cavity 216. If the second limiting block 6 is also removed, the sampling rod 11 can break the third sealing element 25 and enter the liquid separation cavity 216.

[0050] In addition, in order to enable the sample inside the inner recess 13 of the sampling rod 11 to be fully contacted with the treatment liquid, a fourth sealing element 26 is arranged inside the first liquid cavity 214, and a fifth sealing element 27 is arranged inside the second liquid cavity 215, so as to respectively divide the first liquid cavity 214 and the second liquid cavity 215 into upper and lower cavity bodies. The fourth sealing element 26 and the fifth sealing element 27 can be the same as the first sealing element 23 in structure, or can be different. Taking the case of the same structure as an example, it is illustrated. Actually, the treatment liquids stored in the first liquid cavity 214 and the second liquid cavity 215 are all located in the upper cavities of the two. When the sampling rod 11 breaks the first sealing element 23 and enters the first liquid cavity 214, the fourth sealing element 26 is also broken, and the tail end of the sampling rod 11 is located in the lower cavity of the first liquid cavity 214. The inner diameter of the rubber ring 231 of the fourth sealing element 26 is greater than the sampling rod 11, and does not block the treatment liquid in the upper cavity from flowing to the lower cavity. In the process of the treatment liquid flowing to the lower cavity, the sample in the inner recess 13 can be taken away and fully contacted with the sample, so as to achieve the purpose of mixing. The sampling rod 11 enters the second liquid cavity 215 from the first liquid cavity 214, and also breaks the fifth sealing element 27 at the same time.

[0051] In combination Figure 5 and Figure 10The bottom end of the detection shell 2 is closed by the bottom support 3, so that the liquid in the detection shell 2 cannot flow out from the bottom of the detection shell 2. The bottom support 3 is closedly connected with the outer shell 22, but is in communication with the inner sleeve 21. The second supporting sleeve 212 is provided with a liquid distribution hole 217 on the liquid distribution cavity 216, which is arranged in correspondence with the quantitative cavity 31 of the bottom support 3, that is, the sample liquid can enter the quantitative cavity 31 from the liquid distribution hole 217, and the quantitative cavity 31 is also in communication with the containing cavity, because the detection reagent 4 in the containing cavity can contact the sample liquid in the quantitative cavity 31 and perform detection. The number of containing cavities can be multiple, so as to contain different detection reagents 4 and perform different detection items, facilitating the operation of combined detection, and compared with single detection, the detection range is wider, and the complexity of detection can be simplified.

[0052] Please refer to Figure 4 In order to avoid the shaking of the detection reagent 4 in the containing cavity, a corresponding clamping plate can be arranged in the containing cavity to position and install the detection reagent 4, so as to avoid the shaking of the detection reagent 4 in the containing cavity. At the same time, the outer shell 22 can be entirely made of transparent material, or only the observation position of the detection reagent 4 is made of transparent material, so as to facilitate the observation of the detection result of the detection reagent 4.

[0053] Since the second supporting sleeve 212 is located directly above the bottom support 3, and the liquid distribution hole 217 in the liquid distribution cavity 216 needs to correspond to the quantitative cavity 31, the bottom plate center of the second supporting sleeve 212 can be provided with a positioning protrusion, and the top center of the bottom support 3 is provided with a corresponding positioning groove. The positioning protrusion and the positioning groove not only can realize the clamping between the second supporting sleeve 212 and the bottom support 3, but also can realize the quick positioning of the two, so that the liquid distribution hole 217 and the quantitative cavity 31 are one-to-one corresponding.

[0054] Please refer to Figure 10 and Figure 11 In order to realize the quantitative operation of the quantitative cavity 31, the quantitative cavity 31 is provided with a liquid discharge port 32 at the top end of the side portion, the bottom support 3 forms a waste liquid cavity 33 in communication with the liquid discharge port 32 between the second supporting sleeve 212 and the outer shell 22, and the waste liquid cavity 33 is in communication with the quantitative cavity 31 through the liquid discharge port 32. Since the top end of the waste liquid cavity 33 is lower than the quantitative cavity 31, the liquid discharge port 32 is equivalent to the top of the waste liquid cavity 33, but the liquid discharge port 32 is still a certain distance away from the bottom end of the quantitative cavity 31. Therefore, when the sample liquid in the quantitative cavity 31 exceeds the volume of the quantitative cavity 31, the excess liquid can enter the waste liquid cavity 33 from the liquid discharge port 32, so as to ensure that the liquid in the quantitative cavity 31 is maintained within an error allowable range, so that the detection reagent 4 detects the same volume of sample liquid, and the accuracy of the detection result is improved.

[0055] For the convenience of understanding the scheme of the embodiment, the working principle of the device as a whole is described below. The sample is sampled by using the sampling rod 11, and after collection, the sampler 1 is inserted into the detection shell 2. The first limiting block 5 and the second limiting block 6 are always clamped on the end cap 12, so that the sampling rod 11 is limited to pass through the first sealing element 23 and the fourth sealing element 26, and the tip of the sampling rod 11 is located in the lower cavity of the first liquid cavity 214. After the sampling rod 11 passes through the rubber ring 231 of the first sealing element 23, the excess sample is intercepted in the residual sample cavity 213 by the rubber ring 231, and the treatment liquid stored in the upper cavity of the first liquid cavity 214 is mixed with the sample. After standing for a few minutes, the first limiting block 5 is pulled out, and the sampler 1 is pressed to continue moving downward. The sampling rod 11 pierces the second sealing element 24 and the fifth sealing element 27, and the liquid in the first liquid cavity 214 flows downward and is mixed with the treatment liquid in the second liquid cavity 215. After standing for a few minutes, the second limiting block 6 is pulled out, and the sampler 1 is pressed to continue moving downward. The tail end of the sampling rod 11 enters the separation cavity 216, the sample liquid enters the quantitative cavity 31 from the separation hole 217, the detection reagent 4 contacts the sample liquid in the quantitative cavity 31, and detection is performed.

[0056] If one-step detection is used, the first limiting block 5 and the second limiting block 6 can be combined into one, and in addition, the first liquid cavity 214 and the second liquid cavity 215 can store the same treatment liquid or only one liquid cavity stores the treatment liquid. The treatment liquid can be a diluent or a lysis solution. For sampling using the device, not only feces, but also urine, nasal swabs, and throat swab samples can be used. It is preferred to be applied to feces sampling, because not only dry feces sampling, but also dilute feces sampling can be performed.

[0057] The technical scope of the present application is not limited to the content in the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should be within the protection scope of the present application.

Claims

1. A portable sample testing device, comprising: It comprises: a sampler (1) comprising a sampling rod (11) and an end cap (12); the diameter of the end cap (12) is larger than that of the sampling rod (11) and is integrated with the leading end of the sampling rod (11), and the trailing end wall of the sampling rod (11) is provided with a plurality of inner grooves (13) that are inclined downward from outside to inside along the radial direction of the sampling rod; a detection shell (2) comprising an inner sleeve (21) and an outer shell (22); the inner sleeve (21) is embedded in the outer shell (22) and the gap therebetween forms a containing cavity; the inner sleeve (21) has a processing liquid for processing samples, and the sampling rod (11) extends from the top of the detection shell (2) to the inside of the inner sleeve (21); a bottom support (3) that is sealingly connected to the bottom of the outer shell (22) and is in communication with the bottom end of the inner sleeve (21), and the top of the bottom support (3) and directly below the containing cavity is provided with a dosing cavity (31); a detection reagent (4) that is installed in the containing cavity of the detection shell (2) and extends to the dosing cavity (31) of the bottom support (3) at the bottom; the inner sleeve (21) comprises a first sleeve (211) and a second sleeve (212); the first sleeve (211) and the second sleeve (212) are sealingly sleeved at the leading end and the trailing end, the inner wall of the first sleeve (211) is sequentially connected from top to bottom with a first sealing member (23), a second sealing member (24) and a third sealing member (25), thereby sequentially separating the inner cavity of the first sleeve (211) into a residual sample cavity (213), a first liquid cavity (214) and a second liquid cavity (215); the third sealing member (25) at the bottom and the inner cavity of the second sleeve (212) form a liquid distribution cavity (216), and the second sleeve (212) is in communication with the dosing cavity (31) of the bottom support (3); the dosing cavity (31) of the bottom support (3) is provided at the top of the side portion with a liquid discharge port (32) for discharging excess liquid, and the bottom support (3) and the second sleeve (212) and the outer shell (22) form a waste liquid cavity (33) in communication with the liquid discharge port (32), and the waste liquid cavity (33) is in communication with the dosing cavity (31) through the liquid discharge port (32); the fourth sealing member (26) is arranged inside the first liquid cavity (214), and the fifth sealing member (27) is arranged inside the second liquid cavity (215), thereby respectively separating the first liquid cavity (214) and the second liquid cavity (215) into two part cavities arranged in an upper and lower manner; the first sealing member (23) comprises a rubber ring (231) and a film layer (232).

2. The portable sample testing device of claim 1, wherein, The second sleeve (212) is snap-connected with the bottom support (3), and the liquid distribution cavity (216) of the second sleeve (212) is provided with a liquid distribution hole (217) corresponding to the dosing cavity (31).

3. The portable sample testing device of claim 1, wherein, The outer circumferential surface of the end cap (12) is provided with an annular groove, the first limiting block (5) and the second limiting block (6) are respectively clamped in the annular groove, the first limiting block (5) is located above the second limiting block (6), the outer wall surface of the first limiting block (5) and the second limiting block (6) extends to the outside of the annular groove, the second limiting block (6) is in contact with the top end of the shell (22), the first limiting block (5) and the second limiting block (6) are used for blocking the tail end of the sampling rod (11) from moving towards the second liquid cavity (215), and the second limiting block (6) is used for blocking the tail end of the sampling rod (11) from moving towards the separation cavity (216).

4. The portable sample testing device of claim 3, wherein, The outer circumferential surface of the end cap (12) is embedded with a sealing ring (14), the sealing ring (14) is located below the annular groove and in the gap between the end cap (12) and the inner wall of the first supporting sleeve (211).

5. The portable sample testing device of claim 1, wherein, The outer circumferential surface of the rubber ring (231) is in sealing connection with the first supporting sleeve (211), the inner diameter of the rubber ring (231) is larger than the diameter of the sampling rod (11); the surface of the rubber ring (231) is fixedly connected with a film layer (232) sealing the inner ring thereof.

6. The portable sample testing device of claim 5, wherein, The middle section of the sampling rod (11) is provided with an annular protrusion matching the inner diameter of the rubber ring (231), the tail end of the sampling rod (11) is tapered from top to bottom.

7. The portable sample testing device of any one of claims 1-6, wherein, A plurality of inner grooves (13) are distributed on the outer circumferential surface of the sampling rod (11) in a ring shape.

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