Self-sealing sample container and titration mechanism

Abstract

The utility model relates to the technical field of petroleum product detection, in particular to a self-sealing sample container and a titration mechanism, the self-sealing sample container is applied to the titration mechanism, the titration mechanism comprises a fixed part and a movable part movably arranged on the fixed part, and the movable part comprises a first position and a second position; the self-sealing sample container comprises a container bottle, a bottle cap assembly, a sealing piece and a magnetic body, the container bottle is arranged on the movable part, the bottle cap assembly is arranged at a bottle opening of the container bottle, a cavity, a first through hole and a second through hole are formed in the bottle cap assembly, the first through hole and the second through hole are communicated with the cavity, and the first through hole is communicated with the container bottle; the sealing element is movably arranged in the cavity, and the sealing element has a first state of covering the first through hole and a second state of being far away from the first through hole; the magnetic body is arranged on the fixed part; according to the self-sealing sample container, the opening of the container bottle can be automatically opened and closed, the operation is simple and convenient, the condition of misoperation is avoided, and the accuracy of later product measurement is further ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum product detection, and particularly relates to a self-sealing sample container and a titration mechanism. BACKGROUND

[0002] In the process of petroleum product detection, titration is often applied, wherein the titration solution includes indicator titration solution and determination agent titration solution. When the burette is used to suck the titration solution, the opening of the container bottle needs to be opened, and after the titration solution is sucked, the opening of the container bottle needs to be closed in time to prevent the titration solution from volatilizing. At present, the opening and closing of the opening of the container bottle are completed by manual operation, which is relatively cumbersome and prone to operation errors, and the opening of the container bottle is forgotten to be closed, which affects the concentration of the titration solution and the accuracy of the product determination in the later period. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a self-sealing sample container and a titration mechanism, which can automatically complete the opening and closing of the opening of the container bottle, is simple to operate, and is not prone to operation errors, thereby ensuring the accuracy of the product determination in the later period.

[0004] To this end, in a first aspect, the embodiments of the present application provide a self-sealing sample container applied to a titration mechanism, the titration mechanism including a fixed part and a movable part movably arranged on the fixed part, the movable part including a first position and a second position; the self-sealing sample container includes: a container bottle arranged on the movable part, the container bottle being used to contain a reagent; a bottle cap assembly arranged at a bottle mouth of the container bottle, an inner part of the bottle cap assembly being provided with a cavity, a first through hole and a second through hole in communication with the cavity, and the first through hole being in communication with the container bottle; a sealing member movably arranged in the cavity, the sealing member including a first state of covering the first through hole and a second state of being away from the first through hole; a magnetic body arranged on the fixed part; wherein when the movable part is located at the first position, the magnetic body attracts the sealing member to make the sealing member remain in the second state; and when the movable part is located at the second position, the sealing member returns to the first state.

[0005] In a possible implementation manner, an inner bottom wall of the cavity is provided with a guide inclined groove, a bottom of the guide inclined groove being connected with the first through hole; when the movable part is located at the first position, one end of the guide inclined groove away from the first through hole is directed to the magnetic body.

[0006] In a possible implementation manner, the sealing member is a magnetic sphere.

[0007] In a possible implementation manner, the inner bottom wall of the cavity is in a funnel structure, and the first through hole is located at the lowest part of the funnel structure.

[0008] In a possible implementation, the inner bottom wall of the cavity is provided with a recess, and the recess is coaxially arranged with the first through hole; when the sealing member is in the first state, the sealing member is located in the recess.

[0009] In a possible implementation, the movable part comprises a rotating disc which can rotate relative to the fixed part, and the rotating disc can rotate between the first position and the second position.

[0010] In a possible implementation, the rotating disc is provided with a positioning groove for positioning the container bottle, the container bottle is movably arranged in the positioning groove, the positioning groove is provided with a first positioning part, and the cap assembly is provided with a second positioning part matched with the first positioning part.

[0011] In a possible implementation, the cap assembly comprises a cap body and a supporting plate arranged in the cap body, the cavity is formed between the cap body and the supporting plate, the first through hole is arranged on the supporting plate, and the second through hole is arranged on the cap body.

[0012] In a possible implementation, the second through hole is located directly above the first through hole.

[0013] In a second aspect, the embodiments of the present application provide a titration mechanism, comprising the self-sealing sample container.

[0014] According to the self-sealing sample container and the titration mechanism provided by the embodiments of the present application, when the self-sealing sample container is used for acid-base titration experiment, an operator only needs to place a container bottle containing a liquid to be measured into a positioning groove of a movable part. When the movable part is rotated to the second position (non-test position), the sealing member automatically falls into the first through hole under the action of gravity to form a seal. This process does not require manual intervention, and avoids the problem of incomplete sealing caused by improper operation. When titration is needed, the operator only needs to rotate the movable part to the first position (test position), at which time the magnetic body will automatically attract the sealing member to open the first through hole. This automatic opening process ensures the consistency of each opening and reduces errors caused by human factors. The opening and closing of the opening of the container bottle can be automatically completed, the operation is simple, and the situation of operation error will not occur, thereby ensuring the accuracy of product measurement in the later stage. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which are shown by way of illustration in which like references indicate similar elements, and in which, unless otherwise specified, the figures are not necessarily drawn to scale. The figures depict embodiments that are provided to explain exemplary embodiments of the inventive subject matter described herein.

[0018] Figure 1 A structure diagram of a self-sealing sample container, a fixed part and a movable part provided by an embodiment of the present application is shown;

[0019] Figure 2 A perspective structure diagram of a self-sealing sample container provided by an embodiment of the present application is shown;

[0020] Figure 3 An exploded structure diagram of a self-sealing sample container provided by an embodiment of the present application is shown;

[0021] Figure 4 An exploded structure diagram of a bottle cap assembly provided by an embodiment of the present application is shown;

[0022] Figure 5 A top view structure diagram of a supporting plate provided by an embodiment of the present application is shown;

[0023] Figure 6 A structure diagram of a rotating disc and a self-sealing sample container provided by an embodiment of the present application is shown. Figure 5 A cross-sectional structure diagram along the A-A direction is shown;

[0024] Figure 7 A structure diagram of a rotating disc and a self-sealing sample container provided by an embodiment of the present application is shown.

[0025] Legend of reference signs:

[0026] 1. Container bottle;

[0027] 2. Bottle cap assembly; 21. Cavity; 211. Guide inclined groove; 212. Funnel structure; 213. Sinking groove; 22. First through hole; 23. Second through hole; 24. Cap body; 25. Supporting plate; 26. Second positioning part;

[0028] 3. Sealing member;

[0029] 4. Magnetic body;

[0030] 5. Fixed part;

[0031] 6. Movable part; 61. Rotating disc; 611. Positioning groove; 612. First positioning part. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0033] The following disclosure provides many different embodiments, or examples, for implementing different structures of the embodiments of the present application. For the purpose of simplifying the disclosure of the embodiments of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the reference numerals and / or letters can be repeatedly referred to in different examples in the embodiments of the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0034] For the purpose of description, spatial relative terms can be used in the description to describe the relative positional relationship or movement of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0035] In order to solve the problems in the prior art, the present application provides a self-sealing sample container and a titration mechanism, which can automatically complete the opening and closing of the opening of the container bottle, is simple to operate, and cannot occur in the case of operation failure, thereby ensuring the accuracy of the product determination in the later stage.

[0036] Figure 1 A structural schematic diagram of a self-sealing sample container, a fixed part and a movable part provided by the embodiments of the present application is shown; Figure 2 A three-dimensional structural schematic diagram of a self-sealing sample container provided by the embodiments of the present application is shown; Figure 3This diagram illustrates the exploded structure of a self-sealing sample container according to an embodiment of this application. Figure 4 This diagram illustrates an exploded view of a bottle cap assembly according to an embodiment of this application. Figure 5 The figure shows a top view of a tray according to an embodiment of this application; Figure 6 Show Figure 5 Schematic diagram of the cross-sectional structure along the AA direction; Figure 7 This diagram illustrates a structural schematic of the connection between a turntable and a self-sealing sample container provided in an embodiment of this application.

[0037] like Figures 1-7 As shown, this application provides a self-sealing sample container for use in a titration mechanism. The titration mechanism includes a fixed part 5 and a movable part 6 movably disposed on the fixed part 5. The movable part 6 includes a first position and a second position. The self-sealing sample container includes: a container bottle 1 disposed on the movable part 6, which is used to contain reagents; a cap assembly 2 disposed at the mouth of the container bottle 1, which has a cavity 21 and a first through hole 22 and a second through hole 23 communicating with the cavity 21, the first through hole 22 communicating with the container bottle 1; a sealing member 3 movably disposed in the cavity 21, which includes a first state of sealing the first through hole 22 and a second state of being away from the first through hole 22; and a magnetic body 4 disposed on the fixed part 5. When the movable part 6 is in the first position, the magnetic body 4 attracts the sealing member 3, so that the sealing member 3 is held in the second state; when the movable part 6 is in the second position, the sealing member 3 returns to the first state.

[0038] In this application, in practical use cases, such as acid-base titration experiments, the operator only needs to place the container bottle 1 containing the liquid to be tested into the positioning groove 611 of the movable part 6. When the movable part 6 is rotated to the second position (non-test position), the sealing element 3 automatically falls into the first through hole 22 under the action of gravity, forming a seal. This process requires no manual intervention, avoiding the problem of incomplete sealing caused by improper operation. When titration is required, the operator only needs to rotate the movable part 6 to the first position (test position), at which time the magnetic body 4 will automatically attract the sealing element 3, opening the first through hole 22. This automated opening process ensures the consistency of each opening and reduces errors caused by human factors.

[0039] Taking titration with a highly volatile organic solvent (such as ethanol) as an example, in non-testing conditions, the sealing element 3 tightly seals the first through-hole 22, forming a well-sealed environment with good airtightness. This design not only prevents solvent evaporation but also avoids moisture or other impurities in the environment from entering the container, ensuring the purity and concentration stability of the sample.

[0040] In the scenario of continuously performing multiple sample titrations, the operator can quickly switch between different sample containers by simply rotating the movable part 6. This greatly simplifies the tedious steps of changing samples, opening and closing containers, etc. in traditional titration, improving work efficiency. For example, in a quality control laboratory, technicians can easily handle large quantities of sample detection tasks, reducing the risk of operational errors caused by fatigue.

[0041] The design of the present application is suitable for various types of titration experiments. For example: in acid-base titration, it can effectively prevent the interference of CO2 in the atmosphere; in oxidation-reduction titration, it can avoid the influence of oxygen in the air on easily oxidizable substances; in complexometric titration, it can maintain the stability of metal ions and avoid precipitation or hydrolysis. This wide applicability allows the laboratory to complete multiple types of titration tasks with the same set of equipment, improving equipment utilization and overall laboratory efficiency.

[0042] In some embodiments, the inner bottom wall of the cavity 21 is provided with a guide chute 211, the bottom of which is connected to the first through hole 22; when the movable part 6 is in the first position, the end of the guide chute 211 away from the first through hole 22 points to the magnetic body 4.

[0043] In this application, when performing microtitration, such as the determination of trace metal ions, accurate sealing and opening are crucial. The guide chute 211 ensures that the sealing element 3 (such as a magnetic ball) can accurately fall onto the first through hole 22 in each operation. This precision reduces sample loss or contamination due to improper sealing, improving the accuracy of microanalysis.

[0044] In scenarios that require rapid switching between multiple samples, such as automated titration systems, the inclined design of the guide chute 211 uses gravity to accelerate the movement of the sealing element 3. This design allows the system to switch between sealed and open states more quickly, improving the efficiency of the entire titration process. For example, when performing continuous water sample analysis at a water quality monitoring station, rapid and accurate sample switching and analysis can be achieved.

[0045] In some embodiments, the sealing element 3 is a magnetic sphere.

[0046] In this application, when dealing with volatile or hygroscopic samples, such as the titration of organic solvents or anhydrous substances, the magnetic sphere can form a point contact seal with the circular first through hole 22. This sealing method not only has good sealing effect, but also minimizes the sealing area, reduces the contact between the sample and the sealing element 3, and reduces potential contamination or adsorption problems.

[0047] In continuous multi-sample analysis, such as the application in automatic titrator, the magnetic ball can freely roll in the cavity 21. This design can maintain good sealing and opening performance even in the case of slight shaking or tilting of the instrument, improving the stability and reliability of the equipment.

[0048] In some embodiments, the inner bottom wall of the cavity 21 is a funnel structure 212, and the first through hole 22 is located at the lowest part of the funnel structure 212.

[0049] In this application, when processing viscous liquid samples, such as titration analysis of certain food or petroleum products, the funnel structure 212 can effectively guide the sealing member 3 (such as a magnetic ball) to accurately fall into the first through hole 22. This design overcomes the hindrance that viscous liquid may cause to the movement of the sealing member 3, ensuring the reliability of each sealing.

[0050] In long-term or repeated titration, the funnel structure 212 promotes the complete reflux of the liquid. For example, in continuous water quality monitoring in an automatic titration system, even if the sample amount is small, it can ensure that each drop of liquid returns to the container bottle 1, avoiding the residue and accumulation of the sample in the cavity 21, and improving the accuracy and repeatability of the analysis.

[0051] In some embodiments, a sink 213 is provided on the inner bottom wall of the cavity 21, and the sink 213 is coaxially arranged with the first through hole 22. When the sealing member 3 is in the first state, the sealing member 3 is located in the sink 213.

[0052] In this application, in experiments that require long-term sealing, such as titration processes of certain slow reactions, the sink 213 provides stable positioning for the sealing member 3. This design allows the sealing member 3 to firmly stay at the predetermined position under the action of gravity, and maintains good sealing effect even in the case of external vibration or temperature change.

[0053] In high-precision titration, such as trace analysis or standard solution calibration, the coaxial design of the sink 213 ensures that the sealing member 3 can accurately close the first through hole 22 each time. This accuracy reduces the micro-leakage caused by the deviation of the sealing position, improving the reliability and reproducibility of the analysis results.

[0054] In some embodiments, the movable part 6 includes a rotating disc 61 that can rotate relative to the fixed part 5. The rotating disc 61 can rotate between a first position and a second position.

[0055] In this application, in scenarios that require frequent sample replacement, such as batch product testing in quality control laboratories, the design of the rotating disc 61 allows the operator to complete the switching of the sample container through a simple rotating action. This greatly reduces the cumbersome steps of taking and placing the container, opening and closing the lid in the traditional method, improves the work efficiency, and reduces the operation fatigue.

[0056] In the automated titration system, the turntable 61 can be precisely positioned to the first position (test position) and the second position (sealing position) by mechanical or electronic control. Such precise positioning ensures the consistency of conditions for each test, improving the comparability and reliability of the analysis results. For example, when conducting continuous water quality monitoring at an environmental monitoring station, it can be ensured that each sample is analyzed at the same position, reducing the systematic error caused by position changes.

[0057] In some embodiments, the turntable 61 is provided with a positioning groove 611 for positioning the container bottle 1, the container bottle 1 is movably arranged in the positioning groove 611, and the positioning groove 611 is provided with a first positioning part 612. The bottle cap assembly is provided with a second positioning part 26 that cooperates with the first positioning part 612.

[0058] In this application, in the titration experiment that requires precise control of reaction conditions, such as temperature-sensitive titration reaction, the positioning structure ensures that the container bottle 1 is in exactly the same position in each test. Such precise positioning helps to maintain the consistency of experimental conditions, especially when the titration device is equipped with temperature control or stirring device, the accuracy of positioning directly affects the reliability of the experimental results.

[0059] In the titration process that requires long-time reaction or multiple reagent addition, the positioning structure prevents accidental rotation of the container bottle 1 during operation. This not only ensures the reliability of sealing, but also ensures the consistency of multiple liquid addition or sampling positions, improving the accuracy and repeatability of the experiment.

[0060] In some embodiments, the bottle cap assembly includes a cap body 24 and a tray 25 arranged in the cap body 24, and the cap body 24 and the tray 25 form a cavity 21 therebetween. The first through hole 22 is arranged on the tray 25, and the second through hole 23 is arranged on the cap body 24.

[0061] In this application, in the laboratory environment with limited space, such as portable titration equipment, this compact design can maximize the use of limited space. For example, in on-site rapid water quality analysis, multiple functions (sealing, guiding, titration liquid addition) can be integrated into a small bottle cap assembly 2, improving the portability and practicality of the equipment.

[0062] When handling samples prone to crystallization or precipitation, such as titration of some inorganic salt solutions, the detachable design allows the operator to easily remove the tray 25 for cleaning. This not only facilitates daily maintenance, but also effectively prevents measurement errors caused by residue accumulation, prolonging the service life of the equipment.

[0063] In some embodiments, the second through hole 23 is located directly above the first through hole 22.

[0064] In this application, when performing precision titration, such as drug content analysis, this design provides a direct vertical path for the titration solution. The titration solution can be added to the sample accurately drop by drop, reducing the residue or splashing of the titration solution on the container wall, improving the accuracy and precision of titration.

[0065] When performing titration experiments sensitive to impurities, such as trace metal ion analysis, this design avoids direct contact of the titration solution with the sealing element 3. This not only reduces potential contamination, but also avoids corrosion or impact of the titration solution on the material of the sealing element 3, prolonging the service life of the sealing element 3 and ensuring long-term stability.

[0066] When performing acid-base titration experiments with the self-sealing sample container, the operator only needs to place the container bottle 1 containing the liquid to be measured into the positioning groove 611 of the movable part 6. When the movable part 6 is rotated to the second position (non-test position), the sealing element 3 automatically falls into the first through hole 22 under the action of gravity, forming a seal. This process does not require manual intervention, avoiding the problem of incomplete sealing due to improper operation. When titration is needed, the operator only needs to rotate the movable part 6 to the first position (test position), at which time the magnetic body 4 will automatically attract the sealing element 3, opening the first through hole 22. This automatic opening process ensures consistency in each opening, reducing errors caused by human factors. The opening and closing of the opening of the container bottle 1 can be automatically completed, the operation is simple, and the situation of operation error will not occur, thereby ensuring the accuracy of the later product measurement.

[0067] The embodiment of the application provides a titration mechanism, which comprises the self-sealing sample container.

[0068] Specifically, the titration mechanism provided in the application is applied to the determination of the acid value of petroleum products, the acidic components in the sample are extracted with ethanol, and then an alkaline solution is titrated to calculate the acid value of the product.

[0069] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be interpreted as necessarily requiring their performance in the specific order described or illustrated, unless explicitly stated otherwise. It should also be understood that additional or alternative steps can be used.

[0070] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example implementations.

[0071] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to the embodiments in light of the above detailed description without departing from the spirit and intended scope of the application. It should be appreciated that the specific exemplary implementations can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Thus, the exemplary implementations described herein are to be considered in all respects as illustrative and not restrictive, and the scope of the application is, therefore, indicated by the appended claims rather than by the foregoing description.

Claims

1. A self-sealing sample container for use with a titration mechanism, the titration mechanism comprising a fixed portion (5) and a movable portion (6) movably arranged on the fixed portion (5), the movable portion (6) comprising a first position and a second position; characterized in that, The self-sealing sample container comprises: a container bottle (1) arranged on the movable part (6), the container bottle (1) being used for containing reagents; a bottle cap assembly (2) arranged at the bottle mouth of the container bottle (1), the bottle cap assembly (2) being internally provided with a cavity (21), a first through hole (22) and a second through hole (23) in communication with the cavity (21), and the first through hole (22) being in communication with the container bottle (1); a sealing member (3) movably arranged in the cavity (21), the sealing member (3) comprising a first state of covering the first through hole (22) and a second state of being away from the first through hole (22); and wherein the fixed part (5) is provided with a magnetic body (4), when the movable part (6) is located at the first position, the magnetic body (4) adsorbs the sealing member (3) to make the sealing member (3) keep in the second state, and when the movable part (6) is located at the second position, the sealing member (3) returns to the first state.

2. The self-sealing sample container of claim 1, wherein, An inner bottom wall of the cavity (21) is provided with a guide inclined groove (211), a bottom of the guide inclined groove (211) is connected with the first through hole (22), and when the movable part (6) is located at the first position, one end of the guide inclined groove (211) away from the first through hole (22) points to the magnetic body (4).

3. The self-sealing sample container of claim 2, wherein, The sealing member (3) is a magnetic sphere.

4. The self-sealing sample container of claim 1, wherein, An inner bottom wall of the cavity (21) is a funnel structure (212), and the first through hole (22) is located at the lowest part of the funnel structure (212).

5. The self-sealing sample container of any one of claims 2-4, wherein, An inner bottom wall of the cavity (21) is provided with a sink groove (213), the sink groove (213) is coaxially arranged with the first through hole (22), and when the sealing member (3) is located at the first state, the sealing member (3) is located in the sink groove (213).

6. The self-sealing sample container of claim 2, wherein, The movable part (6) comprises a rotating disc (61) rotatable relative to the fixed part (5), and the rotating disc (61) is rotatable between the first position and the second position.

7. The self-sealing sample container of claim 6, wherein, The rotating disc (61) is provided with a positioning groove (611) for positioning the container bottle (1), the container bottle (1) is movably arranged in the positioning groove (611), the positioning groove (611) is provided with a first positioning part (612), and the bottle cap assembly (2) is provided with a second positioning part (26) matched with the first positioning part (612).

8. The self-sealing sample container of claim 1, wherein, The bottle cap assembly (2) comprises a cap body (24) and a supporting plate (25) arranged in the cap body (24), the cavity (21) is formed between the cap body (24) and the supporting plate (25), the first through hole (22) is arranged on the supporting plate (25), and the second through hole (23) is arranged on the cap body (24).

9. The self-sealing sample container of claim 1, wherein, The second through hole (23) is located directly above the first through hole (22).

10. A titration mechanism characterized by, The self-sealing sample container comprises: a container bottle (1) arranged on the movable part (6), the container bottle (1) being used for containing reagents; a bottle cap assembly (2) arranged at the bottle mouth of the container bottle (1), the bottle cap assembly (2) being internally provided with a cavity (21), a first through hole (22) and a second through hole (23) in communication with the cavity (21), and the first through hole (22) being in communication with the container bottle (1); a sealing member (3) movably arranged in the cavity (21), the sealing member (3) comprising a first state of covering the first through hole (22) and a second state of being away from the first through hole (22); and wherein the fixed part (5) is provided with a magnetic body (4), when the movable part (6) is located at the first position, the magnetic body (4) adsorbs the sealing member (3) to make the sealing member (3) keep in the second state, and when the movable part (6) is located at the second position, the sealing member (3) returns to the first state.

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