Liquid sampling device capable of selectively filtering

Abstract

The utility model relates to a liquid sampling device capable of selectively filtering, which comprises an outer cylinder and an inner bin, and the outer cylinder comprises a first filtering window and a cylinder body adjacent to the first filtering window; the inner bin is provided with a liquid extracting and sampling device and a bin wall capable of being overlapped with the first filtering window; a sample introduction pipe capable of performing secondary filtration is also arranged; the sample feeding pipe is connected with the liquid extraction sample discharging device; the inner bin can seal or open the first filtering window through rotation. According to the utility model, the first filtering window is arranged on the outer cylinder, and the sample introduction pipe capable of secondary filtering is arranged in the inner bin, so that multiple filtering is realized. In addition, through the arrangement of the liquid extraction and sample discharge device, the liquid sample in the inner bin can be rapidly extracted to the sampling bottle, so that the next analysis can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid sampling, in particular to a liquid sampling device capable of selective filtering. Background Art

[0002] Sampling in liquid analysis refers to taking a small part (i.e., test sample) from a large amount of material and doing further analysis to determine the content of a certain component in the large amount of material. Liquid samples with too much debris often need to be able to filter out large particles of impurities during sampling; liquid samples with complex components often need to be selectively sampled; and stratified liquid samples often require the liquid samples to be representative. The samplers on the market basically only have a single function. In the face of different needs, a variety of samplers are needed. At the same time, in the sampling process, excessive sampling will cause waste and increase costs, and too little sampling may not meet the detection requirements, so quantitative sampling is required. However, when performing quantitative sampling operations on liquids, general sampling devices often perform quantitative analysis by naked eye observation, which has large errors. In order to meet market demand, a liquid sampler that can meet multiple needs at the same time is needed to make sampling more convenient and accurate.

[0003] Patent application number: 202021141046.2, application date: June 18, 2020, utility model name: A liquid biopsy sampling device with an adjustment structure, including a main body, a filter screen and a connecting plate, a protective mechanism is installed on the outside of the main body, and a top cover is arranged on the top of the main body. The liquid biopsy sampling device with an adjustment structure is provided with a protective mechanism, which provides protection for the inner main body, avoids the outer wall of the main body from being hit and thus damaged, and to a certain extent prolongs the service life of the main body, and in the process of the user pulling the top cover, the protective mechanism is extended, further providing protection for the filter screen under the top cover, and the design structure is reasonable, easy to operate, and has strong practicality. The top cover and the filter screen are fixedly connected. During the sampling process, the liquid first passes through the filter screen and then enters the inner cavity. The filter screen well blocks impurities and the like, ensures the quality of the sampled liquid, and thus avoids errors in the liquid biopsy process.

[0004] In the prior art, the filter can only block larger impurities, and the liquid can only enter the inner cavity after one filtration. Over time, the filtering function of the filter will be weakened due to impurities clogging the mesh holes; and when the liquid needs to be filtered for heavy metals or needs to be separated from water and oil first, the prior art cannot achieve this.

[0005] In addition, after the sampling of the prior art solution is completed, the liquid sample stored in the inner cavity cannot be quickly extracted and sampled. The only way is to open the top cover and the connecting block in turn, take out the filter, and pour out the liquid sample. If the liquid sample contains corrosive or contaminating components, it will be more troublesome to remove the liquid sample. Utility Model Content

[0006] In view of the defects of the prior art filter screen that the effect is single, the filtering function will be weakened due to impurities clogging the mesh holes, and after sampling, the liquid sample stored in the inner cavity cannot be quickly extracted for sampling, the purpose of the utility model is to provide a liquid sampling device with selective filtering.

[0007] The technical solution provided by the utility model is:

[0008] A selectively filtration liquid sampling device comprises an outer barrel, wherein the outer barrel comprises a first filter window and a barrel body adjacent to the first filter window;

[0009] The inner chamber is provided with a liquid extraction sampling device and a chamber wall which can overlap with the first filter window; it is also provided with a sampling tube which can perform secondary filtration; the sampling tube is connected to the liquid extraction sampling device; the inner chamber can seal or open the first filter window by rotating.

[0010] Furthermore, when the inner bin is rotated so that the first filter window overlaps with the bin wall, the bin wall and the cylinder form a closed inner cavity.

[0011] Preferably, there is at least one pair of filter windows, and each filter window includes a plurality of vertical sand cores for filtering large particle impurities.

[0012] Preferably, the filter window further comprises a filter membrane; the filter membrane is arranged on the outer wall of the vertical strip-shaped sand core.

[0013] Preferably, the sample inlet tube is evenly distributed with a plurality of filter mesh holes.

[0014] Preferably, the liquid extraction sampling device comprises a liquid extraction drive device and a sample outlet tube; the sample outlet tube is located between the liquid extraction drive device and the sample inlet tube; the liquid extraction drive device is used to drive the liquid to flow from the sample inlet tube into the sample outlet tube (25); and the end of the sample outlet tube is connected to a sampling bottle.

[0015] Preferably, the inner chamber comprises a reflux pipe; the reflux pipe is arranged in parallel with the sample inlet pipe and is connected to the liquid extraction drive device.

[0016] Preferably, the barrel is provided with a clamping hole; the clamping hole is located above the first filter window; and the inner compartment is provided with a buckle for use with the clamping hole.

[0017] Preferably, the buckle is a soft plug, and the liquid extraction drive device is a vacuum device.

[0018] Preferably, the inner warehouse is also provided with a rotating handle; there is at least one rotating handle, which can quickly realize the rotation of the inner warehouse.

[0019] Preferably, the bottom of the cylinder is funnel-shaped to reduce the pressure of the liquid.

[0020] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0021] The utility model realizes multiple filtering by arranging a first filter window in the outer cylinder and arranging a plurality of filter mesh holes in the inner chamber sample feeding tube, wherein the first filter window includes a sand core arranged in a vertical strip shape, which can not only filter large particle impurities, but also ensure the stability of stratified liquid samples when they pass through the first filter window when sampling; different filter membranes can also be arranged outside the sand core according to sampling needs, for filtering heavy metals or separating water and oil, etc.

[0022] In addition, by providing a liquid extraction sampling device, the liquid sample in the inner chamber can be quickly extracted into the sampling bottle for the next step of analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a liquid sampling device capable of selective filtration in one embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the outer cylinder structure of a liquid sampling device capable of selective filtration in one embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of the inner chamber structure of a selectively filtered liquid sampling device in one embodiment of the present application.

[0026] Explanation of the symbols in the schematic diagram:

[0027] Inner chamber 1, first filter window 11, chamber wall 12, clamping hole 13; inner chamber 2, chamber wall 21, sample inlet tube 22, filter mesh 221, liquid extraction drive device 23, reflux tube 24, sample outlet tube 25, sampling bottle 26, buckle 27, rotating handle 28. DETAILED DESCRIPTION

[0028] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0029] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0030] A liquid sampling device capable of selective filtration in this embodiment comprises an outer cylinder 1 and an inner chamber 2. The outer cylinder 1 is provided with a first filter window 11 and a chamber 12, and the two are arranged adjacent to each other. Figure 2 As shown, the first filter window 11 and the bin 12 are arranged side by side and closely connected. To ensure the filtering effect, there is at least one pair of first filter windows 11, and sand core filtering is adopted, and the vertical strips of the sand core are evenly distributed, which can not only filter large particles of impurities, but also can further realize that the layered liquid samples pass through the first filter window 11 more stably, and the liquid samples of different layers enter the inner bin 2 through the vertical strips of the sand core, so as to realize the equal proportion sampling of the content of each component in the liquid sample.

[0031] A filter membrane can also be set on the outer wall of the sand core, and the filter membrane can be replaced according to the sampling needs. For example, some filter membranes can filter heavy metals, some filter membranes can separate gas and liquid or water and oil, and some filter membranes can separate molecules of different mass sizes (such as proteins and amino acids). When sampling, different filter membranes can be set and fixed on the outer wall of the sand core according to needs, or no filter membrane can be set.

[0032] In addition, when the device is placed in a liquid sample, in order to reduce the liquid pressure, the bottom of the outer cylinder 1 can be set to a funnel shape. A clamping hole 13 is provided on the upper part of the first filter window 11, and a buckle 27 used in conjunction with the clamping hole is provided in the inner chamber 2. Preferably, at least one pair of the clamping hole 13 and the buckle 27 are provided, and the buckle is a soft plug.

[0033] The inner bin 2 includes a bin wall 21, a sample inlet tube 22 for secondary filtration, and a liquid extraction sampling device; when the buckle 27 is located in the clamp hole 13, the inner bin 2 is locked, and the bin wall 21 covers the first filter window 11, thereby sealing the first filter window 11. At this time, the bin wall 21 and the bin tube 12 form a closed inner cavity for accommodating the liquid sample after preliminary filtration. In order to facilitate the rotation of the inner bin 2, the inner bin 2 can also be provided with a rotating handle 28, which can quickly realize the locking and separation of the buckle 27 and the clamp hole 13, thereby realizing the sealing and opening of the first filter window 11.

[0034] The liquid extraction sampling device includes a liquid extraction drive device 23 and a sample outlet tube 25. The sample outlet tube 25 is located between the liquid extraction drive device 23 and the sample inlet tube 22. The liquid extraction drive device 23 is used to drive the liquid from the sample inlet tube 22 to flow into the sample outlet tube 25. The end of the sample outlet tube 25 is connected to a sampling bottle 26 for transferring the obtained liquid sample to the sampling bottle 26. Preferably, the liquid extraction drive device 23 is a vacuum device for quickly extracting liquid samples for the next step of analysis. Specifically, when the liquid sampling amount is sufficient, the rotating handle 28 is rotated so that the buckle 27 is located in the clamp hole 13, and the bin wall 21 and the bin tube 12 form a closed inner cavity; the vacuum device is turned on to extract the air in the closed inner cavity, so that the closed inner cavity forms a negative pressure, and then the liquid in the closed inner cavity flows into the sample inlet tube 22.

[0035] Before the liquid flows into the sampling tube 22, secondary filtration can be achieved through the evenly distributed filter mesh 221 provided on the sampling tube 22. In addition, the inner chamber 2 includes a reflux pipe 24, which is arranged in parallel with the sampling tube 22 and is connected to the liquid extraction drive device 23. When the sampling speed of the liquid sample is too fast, the reflux pipe can return the overflowed sample to the inner chamber of the sampler to prevent the liquid sample from entering the vacuum device during vacuuming.

[0036] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A liquid sampling device capable of selective filtration, Features: include, An outer cylinder (1), wherein the outer cylinder (1) comprises a first filter window (11) and a cylinder body (12) adjacent to the first filter window (11); An inner chamber (2), wherein the inner chamber (2) is provided with a liquid extraction sampling device and a chamber wall (21) capable of overlapping with the first filter window (11); a sampling tube (22) capable of secondary filtration is also provided; the sampling tube (22) is connected to the liquid extraction sampling device; and the inner chamber (2) can achieve sealing or opening of the first filter window (11) by rotation.

2. A selectively filtrable liquid sampling device according to claim 1, characterized in that: When the inner bin (2) rotates so that the first filter window (11) overlaps with the bin wall (21), the bin wall (21) and the cylinder (12) form a closed inner cavity.

3. A selectively filterable liquid sampling device according to claim 1, characterized in that: There is at least one pair of filter windows (11), and each filter window (11) comprises a plurality of vertical strip sand cores for filtering large particle impurities.

4. A selectively filterable liquid sampling device according to claim 3, characterized in that: The filter window (11) further comprises a filter membrane; the filter membrane is arranged on the outer wall of the vertical strip-shaped sand core.

5. A selectively filterable liquid sampling device according to claim 1, characterized in that: The sample injection tube (22) is evenly distributed with a plurality of filter mesh holes (221).

6. A selectively filterable liquid sampling device according to claim 1, characterized in that: The liquid extraction sampling device comprises a liquid extraction drive device (23) and a sample outlet tube (25); the sample outlet tube (25) is located between the liquid extraction drive device (23) and the sample inlet tube (22); the liquid extraction drive device (23) is used to drive the liquid to flow from the sample inlet tube (22) into the sample outlet tube (25); and the end of the sample outlet tube (25) is connected to a sampling bottle (26).

7. A selectively filterable liquid sampling device according to claim 6, characterized in that: The inner chamber (2) comprises a reflux pipe (24); the reflux pipe (24) is arranged in parallel with the sample inlet pipe (22) and is connected to the liquid extraction drive device (23).

8. The selectively filterable liquid sampling device according to claim 1, characterized in that: The barrel (12) is provided with a clamping hole (13); the clamping hole (13) is located above the first filter window (11); and the inner bin (2) is provided with a clamping buckle (27) for use with the clamping hole (13).

9. A selectively filterable liquid sampling device according to claim 1, characterized in that: The inner bin (2) is also provided with a rotating handle (28); there is at least one rotating handle (28) capable of quickly realizing the rotation of the inner bin (2).

10. The selectively filterable liquid sampling device according to claim 1, characterized in that: The bottom of the cylinder (12) is funnel-shaped and is used to reduce the pressure of the liquid.

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