Split type solid excrement sampling device suitable for vacuum environment and sampling method thereof

Abstract

The invention discloses a split type solid excrement sampling device suitable for a vacuum environment and a sampling method thereof. The split type solid excrement sampling device comprises a collector and a sampler which are coaxially arranged, and a connecting shell for connecting the collector and the sampler, a solution is stored in the collector, the top surface of the collector is covered and sealed by an upper end cover and a sealing film, and the bottom of the collector is screwed with a lower end cover; a cutting edge for puncturing the sealing film is formed at the bottom of the sampler; the connecting shell is sleeved on the peripheries of the sampler and the cutting edge; the outer top of the connecting shell is screwed with the sampler, and a thread structure matched with the top end of the collector is formed at the inner bottom of the connecting shell. The device has the beneficial effects that a solution in the collector is sealed and stored through the sealing film, the upper end cover and the lower end cover, meanwhile, after the collector, the sampler and the connecting shell are assembled, the inner wall and the outer wall of the collector are in abutting connection and threaded connection with the sampler and the connecting shell respectively, double sealing is achieved, and the sampling efficiency is improved. A solution or a mixed solution in the collector is effectively prevented from floating and diffusing in the space environment, collection and storage operation is facilitated, meanwhile, the risk that a sample is exposed to the external environment is reduced, and the quality of collection and detection results is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a split solid excrement sampling device applicable to a vacuum environment and a sampling method thereof. Background Art

[0002] With the development of fields such as medicine, biology, and aerospace science, the collection and detection of fecal samples play an important role in disease diagnosis, microbial research, and physiological research in the space environment.

[0003] Existing fecal sampling devices mainly include the patent CN212275263U "Porcine Fecal Collection Device for Identification of Balantidium coli" and the patent CN105445056B "A Fecal Sampling Device". Although these devices meet the usage requirements in a conventional environment to a certain extent, in the space environment, their structural designs have significant defects. For example, the collectors for storing solutions in these devices are usually in an open state during use. In the microgravity environment of space, the surface tension and buoyancy effects of liquids fail, resulting in the dilution liquid being prone to floating and spreading, and unable to mix fully with the collected solid excrement. This phenomenon not only affects the uniformity of the sample but also may cause sample contamination, thereby affecting the accuracy of the detection results.

[0004] In addition, most existing fecal sampling devices do not fully consider the sealing and stability of the sample during collection, storage, and transportation. For example, some devices need to transfer the sample multiple times after collection, and the existing technologies including the above patents only adopt a single-layer threaded connection structure, whose connection reliability is insufficient, increasing the risk of the sample being exposed to the external environment. In the space environment, once the solution or the solution mixed with solid excrement is exposed, because the resources in the spacecraft are limited and sample supplementation or re-collection cannot be carried out at any time. Therefore, to solve the above problems, designing a split solid excrement sampling device applicable to a vacuum environment and a sampling method thereof is an important technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art, and provide a split solid excrement sampling device applicable to a vacuum environment and a sampling method thereof.

[0006] The purpose of the present invention is achieved through the following technical solutions: A split solid excrement sampling device applicable to a vacuum environment, comprising a collector and a sampler arranged coaxially, and a connecting shell connecting the two; a solution is stored in the collector, the top surface of which is covered and sealed by an upper end cover and a sealing film, and the bottom of which is screwed with a lower end cover; a cutting edge for piercing the sealing film is formed at the bottom of the sampler; the connecting shell is sleeved on the outer periphery of the sampler and the cutting edge; and the outer top of the connecting shell is screwed with the sampler, and a threaded structure matching the top end of the collector is formed at the inner bottom; in the initial state, the collector is separated from the sampler, and the sealing film completely seals the top surface of the collector; the connecting shell is sleeved on the outer periphery of the sampler and the two are screwed; in the sampling state, the connecting shell is unscrewed from the sampler, and after the two are separated, the bottom of the sampler contacts the solid excrement; in the sample mixing state, the sampler is screwed with the connecting shell, the upper end cover is unscrewed from the top end of the collector, and the collector is screwed with the connecting shell until the bottom end of the sampler is completely located inside the collector and abuts against the inner wall of the collector.

[0007] Preferably, an extension channel is integrally arranged at the bottom end of the collector, and the lower end cover is screwed to the end of the extension channel.

[0008] Preferably, a filter element that is breathable but not water-permeable is arranged in the extension channel; in the sample collection state, the lower end cover is unscrewed from the extension channel, and a sampling needle extends into the extension channel and penetrates through the filter element to sample and detect the mixed solution in the collector.

[0009] Preferably, a sealing tube is centrally arranged in the lower end cover, and in the initial state, sampling state and sample mixing state, the sealing tube is located in the extension channel and fits with the inner wall of the extension channel.

[0010] Preferably, the sealing film is made of tin foil or aluminum foil.

[0011] Preferably, the cross section of the sampler is T-shaped, and it includes a connecting part, a main body part and a sampling part that are integrally and coaxially arranged; a gap for accommodating the connecting shell is formed between the connecting part and the main body part; the sampling part is located below the main body part, and the cutting edge is located on the sampling part.

[0012] Preferably, the main body part and the sampling part are connected by an arc-shaped protrusion in a transitional manner; in the sample mixing state, the arc-shaped protrusion abuts against the inner wall of the collector.

[0013] Preferably, the height of the threaded structure at the inner bottom of the connecting shell is greater than the sum of the height of the sampling part and the threaded height of the top end of the collector; and after the connecting shell and the sampler are assembled, the sampling part is located at the middle position of the threaded structure at the inner bottom of the connecting shell and is arranged with a gap from the threaded structure.

[0014] Preferably, the collector can store 10 - 15 ml of solution; the connection shell is a transparent shell, and its height is greater than that of the sampler.

[0015] Preferably, the sampling method of the split solid excrement sampling device applicable to a vacuum environment as described above includes the following steps: S0, the collector stores the solution, and the top end of the collector is covered and sealed by an upper end cap and a sealing film, and its bottom end is blocked by a lower end cap; the collector is independent of the sampler and the connection shell; the connection shell is sleeved on the outer periphery of the sampler and is screwed to the sampler; S1, take out the collector storing the solution, and unscrew the upper end cap from the top end of the collector to expose the sealing film sealed on the top surface of the collector; S2, take out the sampler, and unscrew the connection shell from the sampler to expose the cutting edge of the sampler; S3, insert the cutting edge of the sampler into the solid excrement, rotate it for one week and then take it out; S4, sleeve the connection shell on the outer periphery of the sampler and connect it to the top of the sampler; S5, screw the collector into the connection shell and gradually approach the sampler until the cutting edge of the sampler pierces the sealing film, and the bottom of the sampler is completely located inside the collector and abuts against the inner wall of the collector; S6, shake the connection shell, the collector and the sampler to fully mix the solid excrement and the solution to form a mixed solution; S7, unscrew the lower end cap from the bottom of the collector; S8, insert the needle tip of the sampling needle into the collector to collect a sample of the mixed solution in the collector.

[0016] The advantages of the technical solution of the present invention are mainly reflected in: The solution in the collector is sealed and stored by the sealing film, the upper end cap and the lower end cap; effectively avoiding the floating and diffusion of the solution in the collector in the space environment, facilitating the collection and storage operations, reducing the risk of the sample being exposed to the external environment at the same time, and improving the accuracy of the collection and detection results; After the sample is in a mixed state, the sampler and the collector are connected through the connection shell. After connection, the inner and outer walls of the collector abut against and are screwed to the sampler and the connection shell respectively to achieve double sealing, so as to reduce the risk of the sample in the collector being exposed and further ensure the detection quality; During the mixing process of the sample, the sealing film is pierced by the cutting edge on the sampler, and together with the double-sealing structure of the sampler and the connection shell, it is ensured that the solution in the collector will not be exposed from beginning to end, reducing the risk of solution exposure; The height of the threaded structure on the connecting shell is designed to be greater than the threaded height on the collector, so that the sealing film on the top surface of the collector is gradually punctured by the sampler during the screwing process, and the puncture opening is gradually enlarged during the rotation of the collector, realizing full contact between the solid excrement and the solution in the collector. Description of the Drawings

[0017] Figure 1 : Exploded view of the initial state of the preferred embodiment of the present invention; Figure 2 : Three-dimensional view of the sample mixing state of the preferred embodiment of the present invention; Figure 3 : Cross-sectional view of the sample mixing state of the preferred embodiment of the present invention. Detailed Description of the Invention

[0018] The objectives, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of the preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

[0019] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. And, in the description of the solution, with the operator as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0020] The present invention discloses a split-type solid excrement sampling device applicable to a vacuum environment and a sampling method thereof. As Figures 1 to 3 shown is a split-type solid excrement sampling device for a vacuum environment, including a coaxially arranged collector 1 and a sampler 2, and a connecting shell 3 connecting the two. Specifically, as Figure 1As shown, the collector 1 can store 10 - 15 ml of solution, which can be a solution for sample detection composed of other known components including physiological saline, and is not limited herein. The top surface of the collector 1 is covered and sealed by an upper end cap 11 and a sealing film 12. The sealing film 12 is made of tin foil or aluminum foil. Of course, in other embodiments, the sealing film 12 can also be made of materials such as PE, PP or PET, and the material of the sealing film 12 is not specifically limited herein. The bottom of the collector 1 is screwed with a lower end cap 13. Further, an extension channel 10 is integrally provided at the bottom end of the collector 1, and the lower end cap 13 is screwed to the end of the extension channel 10.

[0021] Furthermore, in combination with Figure 1 and Figure 3 As shown, a filter element 101 that is breathable but impermeable to water is provided in the extension channel 10; in the sample collection state, the lower end cap 13 is unscrewed from the extension channel 10, and the sampling needle extends into and penetrates the filter element 101 to sample and detect the mixed solution in the collector 1. A sealing tube 131 is centrally provided in the lower end cap 13. In the initial state, sampling state and sample mixing state, the sealing tube 131 is located in the extension channel 10 and fits against the inner wall of the extension channel 10. In the present invention, the solution in the collector 1 is sealed and stored by the sealing film 12, upper end cap 11 and lower end cap 12, effectively preventing the solution in the collector from floating and spreading in the space environment, facilitating the collection and storage operations, while reducing the risk of the sample being exposed to the external environment and improving the accuracy of the collection and detection results.

[0022] As Figures 1 to 2 shown, a cutting edge for piercing the sealing film 12 is formed at the bottom of the sampler 2. In the initial state, the connecting shell 3 is sleeved on the outer periphery of the sampler 2 and the cutting edge; and the outer top of the connecting shell 3 is screwed to the sampler 2. In the sampling state, the sealing film is pierced by the cutting edge at the bottom of the sampler 2, and during this process, the solid excrement at the cutting edge is mixed with the solution in the collector.

[0023] As Figure 3 shown, the cross-section of the sampler 2 is T-shaped, and it includes a connecting portion 21, a main body portion 22 and a sampling portion 23 that are integrally and coaxially arranged. Among them, a gap for accommodating the connecting shell 3 is formed between the connecting portion 21 and the main body portion 22, the sampling portion 23 is located below the main body portion 22, and the cutting edge is located on the sampling portion 23.

[0024] Furthermore, the main body portion 22 and the sampling portion 23 are transitionally connected through an arc-shaped protrusion 223. When the sample is in a mixed state, the arc-shaped protrusion 223 abuts against the inner wall of the collector 1. When changing from the sampling state to the sample mixing state, the collector 1 gradually approaches the sampler. During this process, the arc-shaped protrusion 223 abuts against the inner wall of the collector 1 to play a sealing role. Coupled with the external thread on the top of the collector 1 and the connection shell 3, a double-sealing structure is formed, ensuring that the solution in the collector 1 does not leak during use. At the same time, the exposed volume of the solid excrement on the sampling portion is reduced, reducing the exposure risk and further ensuring the detection quality.

[0025] As Figures 1 to 2 shown, the connection shell 3 is sleeved on the outer periphery of the sampler 2, and a threaded structure matching the top end of the collector 1 is formed at the inner bottom of the connection shell 3. As Figure 3 shown, the height of the threaded structure at the inner bottom of the connection shell 3 is greater than the sum of the height of the sampling portion 23 and the threaded height of the top end of the collector 1. Therefore, during the sample mixing state and the sample mixing process, the threaded structure at the inner bottom of the connection shell 3 plays a role in assembly guidance and connecting the collector 1 and the sampler 2. After the connection shell 3 and the sampler 2 are assembled, the sampling portion 23 is located at the middle position of the threaded structure at the inner bottom of the connection shell 3 and is provided with a gap from the threaded structure. The threaded structure at the inner bottom of the connection shell 3 also plays a role in sealed connection in the sample mixing state and the sample collection state, further ensuring that the solution or mixed solution in the collector 1 does not flow out and improving the use stability.

[0026] Furthermore, in the present invention, it is preferably designed that the connection shell 3 is a transparent shell, so as to observe the moving position of the collector 1 during use in real time. In addition, it is preferably designed that the height of the connection shell 3 is greater than the height of the sampler 2, so that the connection shell 3 can effectively wrap the blade in the sampler 2 in the initial state, effectively preventing the blade from accidentally injuring the operator and improving the use safety.

[0027] In the initial state of the present invention, the collector 1 is separated from the sampler 2, and the sealing film 12 completely seals the top surface of the collector 1; at this time, the connecting shell 3 is sleeved on the outer periphery of the sampler 2, and the two are screwed together. In the sampling state, the connecting shell 3 is unscrewed from the sampler 2. After the two are separated, the sampling part 23 and the cutting edge in the sampler 2 can contact the solid excrement. In the sample mixing state, the sampler 2 is screwed to the connecting shell 3, the upper end cover 11 is unscrewed from the top of the collector 1, and the collector 1 is screwed to the connecting shell 3, so that the collector 1 gradually approaches the sampler 2 until the bottom end of the sampler 2 is completely located inside the collector 1 and abuts against the inner wall of the collector 1. In the sample collection state, the lower end cover 13 is unscrewed from the extension channel 10, and the sampling needle extends into the extension channel 10 and penetrates through the filter element 101 until the needle tip enters the collector 1, and samples and detects the mixed solution in the collector 1.

[0028] A sampling method for a split-type solid excrement sampling device applicable to a vacuum environment, comprising the following steps: S0, there is a solution stored in the collector 1, and the top end of the collector 1 is covered and sealed by the upper end cover 11 and the sealing film 12, and its bottom end is blocked by the lower end cover 13; the collector 1 is independent of the sampler 2 and the connecting shell 3; the connecting shell 3 is sleeved on the outer periphery of the sampler 2 and is screwed to the sampler 2.

[0029] S1, take out the collector 1 storing the solution, and unscrew the upper end cover 11 from the top end of the collector 1 to expose the sealing film 12 sealed on the top surface of the collector 1.

[0030] S2, take out the sampler 2, and unscrew the connecting shell 3 from the sampler 2 to expose the cutting edge of the sampler 2.

[0031] S3, insert the cutting edge of the sampler 2 into the solid excrement and take it out after rotating one week.

[0032] S4, sleeve the connecting shell 3 on the outer periphery of the sampler 2 and connect it to the top of the sampler 2.

[0033] S5, screw the collector 1 into the connecting shell 3 and gradually approach the sampler 2 until the cutting edge of the sampler 2 pierces the sealing film 12, and the bottom end of the sampler 2 is completely located inside the collector 1 and abuts against the inner wall of the collector 1.

[0034] S6, shake the connecting shell 3, the collector 1 and the sampler 2 to fully mix the solid excrement with the solution to form a mixed solution.

[0035] S7. Unscrew the lower end cap 13 from the bottom of the collector 1.

[0036] S8. Insert the needle tip of the sampling needle into the collector 1 to collect a sample of the mixed solution in the collector 1.

[0037] Among them, step S0 is the unused state, i.e., the initial state, of the split solid excrement sampling device applicable to a vacuum environment. Steps S1 to S3 are the sampling process, and when step S3 is completed, the split solid excrement sampling device applicable to a vacuum environment is in the sampling state. Steps S4 to S6 are the sample mixing process, and when step S6 is completed, the split solid excrement sampling device applicable to a vacuum environment is in the sample mixing state. Steps S7 to S8 are the sample collection process, and when step S8 is completed, the split solid excrement sampling device applicable to a vacuum environment is in the sample collection state.

[0038] There are still various implementation manners of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present invention.

Claims

1. A split solid excrement sampling device suitable for use in a vacuum environment, characterized in that: The invention comprises a coaxially arranged collector (1) and a sampler (2), and a connecting shell (3) connecting the two. The collector (1) stores a solution, and its top surface is covered and sealed by an upper end cover (11) and a sealing film (12), and its bottom is screwed with a lower end cover (13). The bottom of the sampler (2) is formed with a cutting edge for piercing the sealing film (12). The connecting shell (3) is sleeved on the periphery of the sampler (2) and the cutting edge. The outer top of the connecting shell (3) is screwed with the sampler (2), and the inner bottom is formed with a threaded structure that matches the top of the collector (1). In the initial state, the collector (1) is separated from the sampler (2). , and the sealing film (12) completely seals the top surface of the collector (1); the connecting shell (3) is sleeved on the outer periphery of the sampler (2), and the two are screwed together; in the sampling state, the connecting shell (3) is screwed out from the sampler (2), and after the two are separated, the bottom of the sampler (2) contacts the solid excrement; in the sample mixing state, the sampler (2) is screwed to the connecting shell (3), the upper end cover (11) is screwed out from the top of the collector (1), and the collector (1) is screwed to the connecting shell (3) until the bottom end of the sampler (2) is completely located in the collector (1) and abuts against the inner wall of the collector (1).

2. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 1, characterized in that: An extension channel (10) is integrally provided at the bottom end of the collector (1), and the lower end cover (13) is screwed to the end of the extension channel (10).

3. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 2, characterized in that: An air-permeable and water-tight filter element (101) is arranged in the extension channel (10); in a sample collection state, the lower end cover (13) is screwed out of the extension channel (10), and a sampling needle is inserted into the extension channel (10) and penetrates the filter element (101) to sample and test the mixed solution in the collector (1).

4. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 3, characterized in that: A sealing tube (131) is centrally disposed in the lower end cover (13); in the initial state, the sampling state and the sample mixing state, the sealing tube (131) is located in the extension channel (10) and fits against the inner wall of the extension channel (10).

5. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 1, characterized in that: The sealing film (12) is made of tin foil or aluminum foil.

6. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 1, characterized in that: The sampler (2) has a T-shaped cross section and comprises a connecting portion (21), a main body (22) and a sampling portion (23) which are integrally and coaxially arranged; a gap for accommodating the connecting shell (3) is formed between the connecting portion (21) and the main body (22); the sampling portion (23) is located below the main body (22), and the cutting edge is located on the sampling portion (23).

7. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 6, characterized in that: The main body (22) and the sampling portion (23) are transitionally connected via an arc-shaped protrusion (223); in a sample mixing state, the arc-shaped protrusion (223) abuts against the inner wall of the collector (1).

8. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 6, characterized in that: The height of the threaded structure at the inner bottom of the connecting shell (3) is greater than the sum of the height of the sampling portion (23) and the height of the threaded top of the collector (1); and after the connecting shell (3) and the sampler (2) are assembled, the sampling portion (23) is located in the middle of the threaded structure at the inner bottom of the connecting shell (3), and a gap is provided between the sampling portion (23) and the threaded structure.

9. The split solid excrement sampling device suitable for use in a vacuum environment according to claim 1, characterized in that: The collector (1) can store 10-15 ml of solution; the connecting shell (3) is a transparent shell, and its height is greater than the height of the sampler (2).

10. The sampling method of the split solid excrement sampling device suitable for use in a vacuum environment according to any one of claims 1 to 9, characterized in that: The steps include: S0, a solution is stored in the collector (1), and the top of the collector (1) is covered and sealed by an upper end cover (11) and a sealing film (12), and the bottom of the collector (1) is blocked by a lower end cover (13); the collector (1) is independent of the sampler (2) and the connecting shell (3); the connecting shell (3) is sleeved on the outer periphery of the sampler (2) and is screwed to the sampler (2); S1, taking out the collector (1) storing the solution, and unscrewing the upper end cover (11) from the top of the collector (1), exposing the sealing film (12) sealed on the top surface of the collector (1); S2, taking out the sampler (2), and unscrewing the connecting shell (3) from the sampler (2) to expose the cutting edge of the sampler (2); S3, inserting the cutting edge of the sampler (2) into the solid excrement, rotating it once and then taking it out; S4, sleeve the connecting shell (3) on the outer periphery of the sampler (2) and connect it to the top of the sampler (2); S5, screwing the collector (1) into the connecting shell (3) and gradually approaching the sampler (2) until the cutting edge of the sampler (2) pierces the sealing film (12) and the bottom of the sampler (2) is completely located in the collector (1) and abuts against the inner wall of the collector (1); S6, shaking the connecting shell (3), the collector (1) and the sampler (2) to fully mix the solid excrement with the solution to form a mixed solution; S7, unscrewing the lower end cover (13) from the bottom of the collector (1); S8, the needle head of the sampling needle is inserted into the collector (1) to collect samples of the mixed solution in the collector (1).

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