Adjustable micro-sampler

Abstract

The invention provides an adjustable micro-sampler, comprising: a main body having a through hole; the adjusting piece is arranged in the through hole in a penetrating mode, a groove is formed in the end of the adjusting piece, the groove and the through hole form a sampling cavity for containing samples, and the adjusting piece moves in the through hole through operation so as to adjust the volume of the sampling cavity.

Description

Technical Field

[0001] The present disclosure relates to the technical field of chemical analysis for sample dissolution and sampling in laboratories, and particularly to an adjustable micro-sampler. Background Art

[0002] When conducting laboratory analysis and testing, it is necessary to weigh powder samples or crystal particle samples. In most cases, the target sampling amount is required to be as consistent as possible (for example, the weighing amount of the powder sample required for testing the trace element content of geological rock samples is 50 milligrams).

[0003] However, the current samplers have deficiencies such as low sampling accuracy, narrow application range, difficult cleaning, and complex operation. Summary of the Invention

[0004] In view of this, the present disclosure provides an adjustable micro-sampler, including: a main body formed with a through hole; and an adjusting member passing through the through hole and threadedly connected to the through hole, the adjusting member and the through hole forming a sampling cavity for accommodating a sample, and by operating, the adjusting member is moved within the through hole to adjust the volume of the sampling cavity.

[0005] Optionally, a groove is formed at an end of the adjusting member, and the groove and the through hole form the sampling cavity, and the groove is configured as a curved surface structure.

[0006] Optionally, the groove is configured as a hemispherical structure.

[0007] Optionally, the main body includes: a sampling head formed with the through hole; and a first handle extending from the circumferential side of the sampling head in a direction perpendicular to the sampling head.

[0008] Optionally, the adjusting member includes: a probing portion having the groove formed at one end; and a second handle provided at the other end of the probing portion away from the groove.

[0009] Optionally, a bevel surface is formed on the circumferential side of the sampling head, and the bevel surface is located at an end of the sampling head away from the adjusting member.

[0010] Optionally, the sampling head is made of a transparent material.

[0011] Optionally, scale lines are provided on the circumferential side of the sampling head.

[0012] Optionally, the main body and the adjusting member are made of corrosion-resistant materials.

[0013] Optionally, the depth of the sampling cavity is greater than or equal to 3 mm and less than or equal to 30 mm.

[0014] According to an embodiment of the present disclosure, by providing a through hole and arranging an adjusting member in the through hole, a sampling cavity for accommodating a sample can be formed. Since the adjusting member is threadedly connected to the through hole, the movement of the adjusting member in the through hole can be controlled more precisely, so that the volume of the sampling cavity can be adjusted more precisely, and thus the purpose of improving the sampling accuracy can be achieved. Description of the Drawings

[0015] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above and other objects, features and advantages of the present disclosure will become clearer. In the drawings:

[0016] Figure 1 A perspective view of an adjustable micro-sampler according to an embodiment of the present invention is schematically shown.

[0017] Figure 2 A cross-sectional view of an adjustable micro-sampler according to an embodiment of the present invention is schematically shown.

[0018] Figure 3 A perspective view of a main body according to an embodiment of the present invention is schematically shown.

[0019] Figure 4 A perspective view of an adjusting member according to an embodiment of the present invention is schematically shown.

[0020] Reference Signs

[0021] 1. Main body; 11. Through hole; 12. Sampling head; 121. Inclined surface; 13. First handle; 2. Adjusting member; 21. Groove; 22. Probing portion; 23. Second handle; 3. Sampling cavity. Detailed Embodiments

[0022] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and with reference to the drawings. However, the present invention can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated, and the same reference signs denote the same elements throughout.

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0024] The terms used herein are merely for describing specific embodiments and are not intended to limit the present invention. The terms such as "comprising" and "including" used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0025] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0026] For the convenience of those skilled in the art to understand the technical solution of the present invention, the following technical terms are now explained.

[0027] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning usually understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include, but is not limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning usually understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include, but is not limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0028] Figure 1 A perspective view of an adjustable micro-sampler according to an embodiment of the present invention is schematically shown. Figure 2 A sectional view of an adjustable micro-sampler according to an embodiment of the present invention is schematically shown. Figure 3 A perspective view of a main body according to an embodiment of the present invention is schematically shown. Figure 4 A perspective view of an adjusting member according to an embodiment of the present invention is schematically shown.

[0029] As Figures 1-4 shown, an embodiment of the present invention provides an adjustable micro-sampler. The adjustable micro-sampler may include a main body 1 and an adjusting member 2. The main body 1 may be formed with a through hole 11. The adjusting member 2 may be inserted through the through hole 11. The adjusting member 2 is threadedly connected to the through hole 11. The adjusting member 2 and the through hole 11 form a sampling cavity 3 for accommodating a sample, that is, an effective sampling volume. The sample may include substances for laboratory analysis such as powder samples and crystal particles. One end of the sampling cavity 3 (such as Figure 2The right end of the sampling cavity 3 shown) is shielded by the adjusting member 2, and the other end of the sampling cavity 3 (such as Figure 2 the left end of the sampling cavity 3 shown) has an opening. By operating, the adjusting member 2 is moved within the through hole 11 to adjust the volume of the sampling cavity 3.

[0030] According to an embodiment of the present disclosure, by providing the through hole 11 and arranging the adjusting member 2 within the through hole 11, a sampling cavity 3 for accommodating a sample can be formed. Since the adjusting member 2 is threadedly connected to the through hole 11, the movement of the adjusting member 2 within the through hole 11 can be more precisely controlled, thereby more precisely adjusting the volume of the sampling cavity 3, and further achieving the purpose of improving the sampling accuracy.

[0031] In some exemplary embodiments, an end portion of the adjusting member 2 (such as Figure 2 the left end of the adjusting member 2 shown) is formed with a groove 21, and the groove 21 and the through hole 11 form the sampling cavity 3. The groove 21 is configured as a curved surface structure. Since the curved surface structure has no edge dead corners such as right angles or edges, it can prevent the sample from staying in the edge dead corners due to surface tension or adhesion force, which is more conducive to emptying the sample in the sampling cavity 3. For example, the groove 21 includes but is not limited to being configured as a U-shaped, ellipsoidal, spherical or other curved surface structures.

[0032] In some exemplary embodiments, the groove 21 is configured as a hemispherical structure. Since the geometric center of the hemispherical structure is closer to the line of action of gravity, the sample is more concentratedly pulled by gravity during pouring. Therefore, when the groove 21 is a hemispherical structure, it is more conducive to emptying the sample in the sampling cavity 3.

[0033] In some exemplary embodiments, the main body 1 includes a sampling head 12 and a first handle 13. The sampling head 12 is formed with a through hole 11. The first handle 13 extends from the circumferential side of the sampling head 12 in a direction perpendicular to the sampling head 12. When sampling, the operator can effectively transfer the hand movements (scooping, pouring) to the sampling head 12 by holding the first handle 13, which facilitates the operation of the operator.

[0034] In some exemplary embodiments, the adjusting member 2 includes a probing portion 22 and a second handle 23. One end of the probing portion 22 (such as Figure 2 the left end of the probing portion 22 shown) is formed with a groove 21. The second handle 23 is provided at the other end of the probing portion 22 away from the groove 21 (such as Figure 2 the right end of the probing portion 22 shown). Internal threads or external threads can be formed on the probing portion 22. External threads or internal threads matching the shape of the internal threads or external threads can be formed on the side of the through hole 11 close to the adjusting member 2. By rotating the second handle 23, the probing portion 22 can be driven to rotate, so that the probing portion 22 can move within the through hole 11 to more precisely adjust the volume of the sampling cavity 3.

[0035] According to the embodiments of the present disclosure, the surface of the insertion part 22 without threads can closely fit with the surface of the through hole 11 without threads to prevent the sample from entering the gap between the two during sampling.

[0036] In some exemplary embodiments, an inclined surface 121 is formed on the circumferential side of the sampling head 12. The inclined surface 121 is located at the end of the sampling head 12 away from the adjusting member 2 (such as Figure 2 the left end of the adjusting member 2 as shown), that is, the diameter of the end of the sampling head 12 close to the adjusting member 2 is smaller than the diameter of the end of the sampling head 12 away from the adjusting member 2, which can make the sampling head 12 smoothly inserted into the sample.

[0037] In some exemplary embodiments, the sampling head 12 can be made of a transparent material to facilitate observing the position of the insertion part 22, so as to determine the volume of the sampling cavity 3.

[0038] In some exemplary embodiments, scale lines are provided on the circumferential side of the sampling head 12 to more accurately observe the position of the insertion part 22, so as to more accurately adjust the volume of the sampling cavity 3.

[0039] In the process of implementing the present application, it is found that since the current sampler is made of metal or contains a metal mechanism, it cannot be used for sampling corrosive powder or crystal particle chemical samples (such as sodium hydroxide, ammonium bifluoride, and ammonium fluoride, etc.), or for long-term use in a laboratory acidic environment.

[0040] In some exemplary embodiments, the main body 1 and the adjusting member 2 can be made of corrosion-resistant materials to facilitate sampling of corrosive samples and enable the sampler to be used in a laboratory acidic environment for a long time. For example, the main body 1 and the adjusting member 2 can be made of fluoroplastics, so that the main body 1 and the adjusting member 2 have corrosion resistance, wear resistance, and self-lubricating properties. Due to the self-lubricating properties of the main body 1 and the adjusting member 2, it is more conducive to emptying the sample in the sampling cavity 3. Further, the main body 1 can be made of perfluoroalkoxy alkane copolymer (PFA) material, so that the prepared main body 1 is semi-transparent white. The adjusting member 2 can be made of white opaque polytetrafluoroethylene (PTFE) material.

[0041] In some exemplary embodiments, the depth of the sampling cavity 3 is greater than or equal to 3 mm and less than or equal to 30 mm, so as to control the sampling weight range between milligrams and grams.

[0042] In some exemplary embodiments, by changing the diameters and lengths of the through hole 11 and the insertion part 22 and adjusting the position of the insertion part 22 in the through hole 11, batch sampling of samples with different weights can be achieved.

[0043] The working process of sampling using an adjustable micro-sampler is described in detail below.

[0044] Screw the probing part 22 into the rear end of the through hole 11 (such as the right end of the through hole 11 shown), and change the volume of the sampling chamber 3 by adjusting the depth of the screwed-in thread. Horizontally insert the sampling head 12 into the sample powder or particles (or by tilting the sampling head 12, use the sampling chamber 3 to scoop up the sample powder or particles). By slightly pressing the sample with a little force, and using the aggregation formed by the van der Waals force between the powder and / or particles, the solid powder or particle sample fills the sampling chamber 3 with relative compactness. Figure 2 During the process of transferring the sample to the weighing container, by changing the angle of the first handle 13, make the opening of the sampling chamber 3 face upward, then the sample will not spill. Make the opening of the sampling chamber 3 face downward on the weighing container, or gently knock the sampling head 12. Since the main body 1 and the adjusting part 2 have self-lubricity, the sample will not stay on the inner wall of the sampling chamber due to adhesion force and can fall into the weighing container more easily. Check the weight of the solid powder with the weighing container, and accordingly rotate the probing part 22 to change the volume of the sampling chamber 3, and weigh the sample again. Repeat several times to make the volume of the sampling chamber 3 meet the requirement of the target sampling weight.

[0045] In some exemplary embodiments, the adjustable micro-sampler can be used to sample 50 mg of granite powder. Further, the diameter of the sampling chamber 3 can be set to 3 mm, and rotate the adjusting part 2 to make the depth of the sampling chamber 3 about 3 mm. The density of the granite powder is about 2.6 g / cm³. At this time, the sampling chamber 3 can collect about 50 mg of granite powder. After sampling, the weight of the sample can be checked with an electronic analytical balance, and accordingly rotate the adjusting part 2 to slightly change the sampling volume of the sampling chamber 3, and weigh the sample again. Repeat several times to adjust the sampling chamber 3 to a volume that can accurately sample 50 mg of granite powder at one time, so that multiple samples of 50 mg of granite powder can be taken based on the adjusted sampler. After each sample is taken, simply rinse the sampling chamber 3 and the components in the vicinity that come into contact with the sample with a wash bottle filled with pure water, and then the sampler can be used to sample other material samples.

[0046]

[0047] ​In some exemplary embodiments, an adjustable micro-sampler can be used to sample 250 mg of ammonium bifluoride. Further, the diameter of the sampling chamber 3 can be set to 6 mm. By rotating the adjusting member 2, the depth of the sampling chamber 3 can be made approximately 6 mm. The density of ammonium bifluoride is 1.52 g / cm³. When the sampling chamber 3 is filled with ammonium bifluoride crystal powder, the weight is approximately 250 mg. After sampling, an electronic analytical balance can be used to check the weight of the sample, and based on this, the adjusting member 2 can be rotated to slightly change the sampling volume of the sampling chamber 3, and ammonium bifluoride can be weighed again. After repeating several times, the sampling chamber 3 can be adjusted to a volume that can accurately sample 250 mg of ammonium bifluoride at one time, so that multiple portions of 250 mg of ammonium bifluoride can be sampled based on the adjusted sampler.

[0048] In some exemplary embodiments, an adjustable micro-sampler can be used to sample 2 g of rock powder. Further, the diameter of the sampling chamber 3 can be set to 10 mm. By rotating the adjusting member 2, the depth of the sampling chamber 3 can be made approximately 10 mm. The density of the rock powder is approximately 3.0 g / cm³. When the sampling chamber 3 is filled with the powder, the weight is approximately 2.3 g. After sampling, an electronic analytical balance can be used to check the weight of the sample, and based on this, the adjusting member 2 can be rotated to slightly change the sampling volume of the sampling chamber 3, and the rock powder can be weighed again. After repeating several times, the sampling chamber 3 can be adjusted to a volume that can accurately sample 2 g of rock powder at one time, so that multiple portions of 2 g of rock powder can be sampled based on the adjusted sampler. After each rock powder sampling is completed, a wash bottle filled with pure water can be used to simply rinse the sampling chamber 3 and the components in the vicinity that come into contact with the sample, and then sampling of other rock powder samples can be carried out.

[0049] In some exemplary embodiments, by fixing the diameter of the sampling chamber 3 and increasing the stroke range of the adjusting member 2, that is, changing the depth of the sampling chamber 3 over a large range, sampling over a wider weight range can be achieved. For example, when the diameter of the sampling chamber is set to 5 mm, by rotating the adjusting member 2, the depth range of the sampling chamber 3 is 3 - 30 mm, and the sample density is 2.0 g / cm 3 when sampling in the weight range of 0.12 g to 1.2 g can be achieved.

[0050] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features recited in the various embodiments and / or claims of the present disclosure can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0051] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should fall within the scope of the present disclosure.

Claims

1. An adjustable micro-sampler, characterized in that, Comprising: A main body formed with a through hole; and An adjusting member inserted through the through hole and threadedly connected to the through hole. The adjusting member and the through hole form a sampling cavity for accommodating a sample. By operating, the adjusting member is moved within the through hole to adjust the volume of the sampling cavity.

2. The adjustable micro-sampler according to claim 1, wherein A groove is formed at an end of the adjusting member. The groove and the through hole form the sampling cavity, and the groove is configured as a curved surface structure.

3. The adjustable micro-sampler according to claim 2, wherein, The groove is configured as a hemispherical structure.

4. The adjustable micro-sampler according to claim 1, wherein, The main body includes: A sampling head formed with the through hole; and A first handle extending from the periphery of the sampling head in a direction perpendicular to the sampling head.

5. The adjustable micro-sampler according to claim 2, characterized in that, The adjusting member includes: A probing portion having the groove formed at one end; and A second handle provided at the other end of the probing portion away from the groove.

6. The adjustable micro-sampler according to claim 4, characterized in that An inclined surface is formed on the periphery of the sampling head, and the inclined surface is located at an end of the sampling head away from the adjusting member.

7. The adjustable micro-sampler according to claim 4, characterized in that, The sampling head is made of a transparent material.

8. The adjustable micro-sampler according to claim 7, wherein, Scale lines are provided on the periphery of the sampling head.

9. The adjustable micro-sampler according to claim 1, wherein The main body and the adjusting member are made of corrosion-resistant materials.

10. The adjustable micro-sampler according to claim 1, wherein, The depth of the sampling cavity is greater than or equal to 3 mm and less than or equal to 30 mm.

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