Sample testing cup

Abstract

The spectrograph is used for placing a sample and detecting the sample in the X-ray fluorescence spectrograph, the sample testing cup comprises a hollow sleeve with two open ends, the first end of the sleeve is fixedly provided with a testing film, the second end of the sleeve is movably provided with a plunger, and the plunger is arranged in the hollow sleeve. A containing cavity used for containing a sample is formed among the testing film, the sleeve and the plunger, and an exhaust hole which penetrates in the axial direction of the sleeve and is communicated with the containing cavity is formed in the plunger. According to the sample testing cup disclosed by the utility model, the accommodating cavity for accommodating powder or liquid can be formed through the testing film, the sleeve and the plunger, and a sample in the accommodating cavity is compacted and exhausted through the plunger, so that the detection precision is improved; according to the sample testing cup disclosed by the utility model, the sealing ring is arranged between the sleeve and the plunger, so that the sealing performance of the accommodating cavity is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of fluorescence detection equipment, and specifically relates to a sample cup. Background Technology

[0002] With the continuous development of industrial civilization, people are paying more and more attention to their health, leading to an increasing demand for heavy metal testing in food, medicine, soil, and drinking water—materials closely related to health. X-ray fluorescence spectrometry (XRF) is an instrument that analyzes the composition of substances by detecting the characteristic spectra of electron transitions emitted by analytes excited by X-rays. It can perform rapid qualitative and quantitative analysis of the components of solid and fluid samples. This type of instrument is widely used in manufacturing, medical, chemical, metallurgical, and food, pharmaceutical, and environmental industries, among others.

[0003] In the prior art, Chinese utility model patent application number 202020401718.2, entitled "A Sample Cup and a Handheld X-ray Fluorescence Spectrometer," discloses a cylindrical sample cup with openings at both ends and an internal cavity. The bottom of the cup is detachably attached to one of the open ends of the cup body. The cavity of the cup body is used to hold the sample to be tested. The cup body includes an upper cup body and a lower cup body. One end of the lower cup body is connected to the bottom of the cup body, and the other end of the upper cup body is sealed to the other end of the lower cup body. The outer diameter of the lower cup body is larger than that of the upper cup body. However, the sample cup in this technical solution lacks a vent, making it impossible to expel air from the cavity, and the connection between the upper and lower cup bodies is not tight enough.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a sample cup that can solve the technical problems in the prior art.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides a sample cup for placing samples and detecting them in an X-ray fluorescence spectrometer. The sample cup includes a hollow sleeve with openings at both ends. A test membrane is fixedly installed at the first end of the sleeve, and a plunger is movably installed at the second end of the sleeve. A cavity for placing the sample is formed between the test membrane, the sleeve, and the plunger. An exhaust hole is provided on the plunger, which extends through the sleeve along the axial direction and communicates with the cavity.

[0007] In one or more embodiments of this utility model, a pressure ring is detachably installed at the first end of the sleeve, and the test membrane is installed between the pressure ring and the sleeve.

[0008] In one or more embodiments of this utility model, the sleeve includes a first cylinder, a second cylinder, and a third cylinder connected in sequence, wherein the outer diameter of the third cylinder is smaller than the outer diameter of the second cylinder, the outer diameter of the second cylinder is smaller than the outer diameter of the first cylinder, and the test membrane is fixedly installed at the end of the third cylinder, the diameter of the test membrane being larger than the outer diameter of the third cylinder.

[0009] In one or more embodiments of this utility model, the plunger includes a first plug body and a second plug body connected to the first plug body. The outer diameter of the first plug body is larger than the inner diameter of the sleeve, and the outer diameter of the second plug body is smaller than the inner diameter of the sleeve. The vent hole passes through the first plug body and the second plug body sequentially along the axial direction of the sleeve.

[0010] In one or more embodiments of this utility model, the diameter of the first plug is greater than the inner diameter of the sleeve, and the diameter of the second plug is smaller than the inner diameter of the sleeve.

[0011] In one or more embodiments of this utility model, the second plug body is further provided with a mounting groove arranged in a circumferential direction on the side near the end of the test membrane, and a sealing ring is installed in the mounting groove.

[0012] In one or more embodiments of this utility model, the sealing ring is a rubber sealing ring, and the sealing ring is disposed between the mounting groove and the sleeve by an interference fit.

[0013] In one or more embodiments of this utility model, a plurality of anti-slip grooves are provided on the outer side surface of the first plug along the circumferential direction.

[0014] In one or more embodiments of this utility model, the vent hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence. The diameter of the first hole segment gradually decreases from the first end to the second end along the axial direction of the sleeve. The diameters at the junction of the first hole segment and the second hole segment are equal. The diameter of the second hole segment remains unchanged along the axial direction of the sleeve. The diameters at the junction of the third hole segment and the second hole segment are equal. The diameter of the third hole segment gradually increases from the first end to the second end along the axial direction of the sleeve.

[0015] In one or more embodiments of this utility model, the maximum diameter of the third hole segment is greater than the maximum diameter of the first hole segment.

[0016] Compared with the prior art, the sample cup in this utility model can form a cavity for placing powder or liquid through a test membrane, sleeve and plunger. The plunger compacts and vents the sample in the cavity, thereby improving the detection accuracy.

[0017] The sample cup in this invention has a sealing ring between the sleeve and the plunger to ensure the sealing of the cavity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the spectrometer in a specific embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the test membrane structure in a specific embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the sleeve structure in a specific embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the pressure ring structure in a specific embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the plunger structure in a specific embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of the plunger in a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the sealing ring in a specific embodiment of the present invention.

[0026] The main reference numerals in the attached drawings are as follows: 1. Test membrane, 2. Sleeve, 21. First cylinder, 22. Second cylinder, 23. Third cylinder, 24. Through hole, 3. Pressure ring, 4. Plunger, 41. First plug, 42. Second plug, 43. Mounting groove, 44. Vent hole, 441. First hole section, 442. Second hole section, 443. Third hole section, 45. Anti-slip groove, 5. Sealing ring. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "vertical", "horizontal", "top", "bottom", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] As described in the background section, the sample cup in the prior art has a closed cavity for placing the sample. Although this can provide good sealing, the sample is difficult to compact during the compaction process because there is a certain amount of air inside the cavity.

[0030] like Figure 1 and Figure 5 As shown, to address the problems in the background art, this utility model provides a sample cup, including a test membrane 1, a sleeve 2, and a plunger 4. The sleeve 2 is a hollow cylinder with openings at both ends. The test membrane 1 is fixedly installed at the first end of the sleeve 2, and the plunger 4 is movably installed at the second end of the sleeve 2 and can extend into the interior of the sleeve 2. The test membrane 1, the side wall of the sleeve 2, and the plunger 4 extending into the sleeve 2 together form a cavity for placing a sample. The test membrane 1, while providing a sealing function, can also be exposed to X-ray fluorescence light. X-rays and / or fluorescence generated by the spectrometer penetrate; in this embodiment, the sample to be tested can be a powder or a liquid. In order to compact the sample, it is necessary to remove excess air from the cavity. Therefore, compared with the prior art, the plunger 4 in this embodiment is provided with an exhaust hole 44. The axial direction of the exhaust hole 44 is parallel to the axis of the entire plunger 4 and penetrates the entire plunger 4, so that the cavity is connected to the external atmosphere, ensuring that the atmospheric pressure inside the cavity is equal to the external atmospheric pressure when the sample is squeezed, so that the plunger 4 can compact the sample.

[0031] like Figure 1 and Figure 2As shown, in this embodiment, in order to ensure the tightness of the connection between the test membrane 1 and the outer wall of the sleeve 1, a pressure ring 3 is detachably installed on the outer side of the first end of the sleeve 1. The pressure ring 3 can be an elastic rubber ring or a plastic ring that can be threaded with the sleeve 2, thereby ensuring that the edge of the test membrane 1 can be tightly attached to the outer wall of the first end of the sleeve 2.

[0032] like Figure 3 and Figure 4 As shown, in this embodiment, the sleeve 2 includes a first cylinder 21, a second cylinder 22, and a third cylinder 23 connected in sequence. The outer diameter of the third cylinder 23 is smaller than the outer diameter of the second cylinder 22, and the outer diameter of the second cylinder 22 is smaller than the outer diameter of the first cylinder 21. The test membrane 1 is fixedly installed at the end of the third cylinder 23. The diameter of the test membrane 1 is larger than the outer diameter of the third cylinder 23. The outer diameter of the first cylinder 21 is the largest, which can be clamped onto the bayonet of the X-ray fluorescence spectrometer to ensure stability during detection. The outer diameter of the third cylinder 23 is the smallest, which can save the area of ​​the test membrane 1.

[0033] like Figure 5 and Figure 4 As shown, in this embodiment, the plunger 4 includes a first plug body 41 and a second plug body 42 connected to the first plug body 41. The outer diameter of the first plug body 41 is larger than the inner diameter of the sleeve 2, which limits the position of the plunger 4 in the sleeve 2 and prevents the plunger 4 from penetrating too deeply and damaging the test membrane 1. The outer diameter of the second plug body 42 is smaller than the inner diameter of the sleeve 2. The vent hole 44 passes through the first plug body 41 and the second plug body 42 in sequence along the axial direction of the sleeve 2. In this embodiment, the first plug body 41 is provided with an anti-slip groove 45 along the circumferential direction. Multiple anti-slip grooves 45 can be provided and spaced apart, or several annular protrusions can be provided on the first plug body 41 at intervals, which can also play an anti-slip role.

[0034] like Figure 5 and Figure 7 As shown, in this embodiment, in order to ensure the sealing between the plunger 4 and the inner wall of the sleeve 2, the second plug body 42 is also provided with an installation groove 43 arranged in the circumferential direction on the side near the end of the test membrane 1. A sealing ring 5 is installed in the installation groove 43. The sealing ring 5 can be a rubber sealing ring. The sealing ring 5 is installed between the installation groove 43 and the inner wall of the sleeve 2 by interference fit.

[0035] like Figure 6As shown, in this embodiment, the vent hole 44 includes a first segment 441, a second segment 442, and a third segment 443 connected in sequence. The diameter of the first segment 441 gradually decreases from the first end to the second end along the axial direction of the sleeve 2. The diameters at the junction of the first segment 441 and the second segment 442 are equal. The diameter of the second segment 442 remains unchanged along the axial direction of the sleeve 2. The diameters at the junction of the third segment 443 and the second segment 442 are equal. The diameter of the third segment 443 gradually increases from the first end to the second end along the axial direction of the sleeve 2. The maximum diameter of the third segment 443 is greater than the maximum diameter of the first segment 441. Because the diameter of the first segment 441 is smaller, while venting is achieved, the liquid tension at its end face can ensure that the internal sample will not be exposed due to the inversion of the cavity. The larger diameter of the third segment 443 allows the gas to be discharged more quickly.

[0036] In this embodiment, the sample to be tested is a powder or a liquid. When the sample to be tested is a liquid, the plunger 4 on one side of the assembled sample cup, together with the sealing ring 5 installed on its second end, is pulled out. The liquid to be tested is poured into the end of the sleeve 2 near the first cylinder 21. Then, the plunger 4 and the sealing ring 5 are slowly inserted into the sleeve 2. The air in the cavity and the excess liquid to be tested are discharged through the vent hole 44 in the center of the plunger 4. When the plunger 4 reaches the bottom, the first cylinder 21 and the first plug body 41 come into contact, and the quantitative sealing of the liquid to be tested is completed. Due to the surface tension principle of the vent hole 44 in the center of the plunger 4, the sample cup will not leak when it is placed horizontally or upside down. After completing the above operations, the entire sample cup is placed under an X-ray fluorescence spectrometer for detection.

[0037] When the sample to be tested is liquid, pull out the plunger 4 on one side of the assembled sample cup along with the sealing ring 5 installed on its second end. Pour the powder to be tested into the end of the sleeve 2 near the first cylinder 21. Then slowly insert the plunger 4 along with the sealing ring 5 into the sleeve 2. The air in the cavity is discharged through the vent hole 44 in the center of the plunger 4. After the plunger 4 reaches the first cylinder 21 and abuts against the first plug body 41, pull out the plunger 4 and the sealing ring 5 again. Add a small amount of the powder to be tested. Slowly insert the plunger 4 along with the sealing ring 5 installed on its second end into the sleeve 2 again. Repeat the above compaction and powder addition operations until the plunger 4 can no longer be inserted to the bottom, thus completing the compaction of the powder. Then place the entire sample cup under an X-ray fluorescence spectrometer for detection.

[0038] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0039] The sample cup of this invention can form a cavity for placing powder or liquid through the test membrane 1, sleeve 2 and plunger 4. The plunger 4 is used to compact and vent the sample in the cavity, thereby improving the detection accuracy. The sample cup of this invention is provided with a sealing ring between the sleeve 2 and the plunger 4 to ensure the sealing of the cavity.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sample cup for placing a sample and for detection within an X-ray fluorescence spectrometer, characterized in that, The measuring cup comprises a sleeve (2) which is hollow and open at both ends, a test film (1) is fixedly installed at the first end of the sleeve (2), and a plunger (4) is movably installed at the second end of the sleeve (2), a cavity for placing a sample is formed among the test film (1), the sleeve (2) and the plunger (4), and an exhaust hole (44) is formed on the plunger (4) and penetrates through the sleeve (2) in the axial direction and communicates with the cavity.

2. The cuvette according to claim 1, characterized in that A film pressing ring (3) is detachably installed at the first end of the sleeve (2), and the test film (1) is installed between the film pressing ring (3) and the sleeve (2).

3. The cuvette according to claim 1, characterized in that The sleeve (2) comprises a first cylinder body (21), a second cylinder body (22) and a third cylinder body (23) which are connected in sequence, the outer diameter of the third cylinder body (23) is smaller than that of the second cylinder body (22), the outer diameter of the second cylinder body (22) is smaller than that of the first cylinder body (21), the test film (1) is fixedly installed at the end of the third cylinder body (23), and the diameter of the test film (1) is greater than the outer diameter of the third cylinder body (23).

4. The cuvette according to claim 1, characterized in that The plunger (4) comprises a first plug body (41) and a second plug body (42) connected with the first plug body (41), the outer diameter of the first plug body (41) is greater than the inner diameter of the sleeve (2), the outer diameter of the second plug body (42) is smaller than the inner diameter of the sleeve (2), and the exhaust hole (44) penetrates through the first plug body (41) and the second plug body (42) in the axial direction of the sleeve (2) in sequence.

5. The cuvette according to claim 4, characterized in that The diameter of the first plug body (41) is greater than the inner diameter of the sleeve (2), and the diameter of the second plug body (42) is smaller than the inner diameter of the sleeve (2).

6. The cuvette according to claim 4, characterized in that The second plug body (42) is further provided with an installation groove (43) arranged in the circumferential direction on the side surface close to one end of the test film (1), and a sealing ring (5) is installed in the installation groove (43).

7. The cuvette according to claim 6, characterized in that The sealing ring (5) is a rubber sealing ring (5) which is arranged between the installation groove (43) and the sleeve (2) through interference fit.

8. The cuvette according to claim 4, characterized in that A plurality of anti-skid grooves (45) are arranged in the circumferential direction on the outer side surface of the first plug body (41).

9. The cuvette according to claim 1, characterized in that The exhaust hole (44) comprises a first hole section (441), a second hole section (442) and a third hole section (443) which are connected in sequence, the diameter of the first hole section (441) gradually decreases from the first end to the second end in the axial direction of the sleeve (2), the diameter of the junction between the first hole section (441) and the second hole section (442) is equal, the diameter of the second hole section (442) is constant in the axial direction of the sleeve (2), the diameter of the junction between the third hole section (443) and the second hole section (442) is equal, and the diameter of the third hole section (443) gradually increases from the first end to the second end in the axial direction of the sleeve (2).

10. The cuvette according to claim 9, characterized in that The maximum diameter of the third hole section (443) is greater than the maximum diameter of the first hole section (441).

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