Powder sample box suitable for spectrum detection

Abstract

The utility model belongs to the technical field of spectrum detection, and particularly relates to a powder sample box suitable for spectrum detection. The powder sample box comprises a sample box body, a light-transmitting piece, a sample box inner cover and a sample box outer cover, a through hole is formed in the sample box body, the light-transmitting piece is limited in the through hole of the sample box body, a convex stand column is arranged at the bottom of the sample box inner cover and extends into the through hole of the sample box body, a boss is arranged at the top of the sample box inner cover, and the sample box outer cover is arranged on the boss. The sample box inner cover is connected with the sample box body through a composite thread structure, a clamping groove matched with the boss is formed in the bottom of the inner side of the sample box outer cover, and the sample box inner cover and the sample box outer cover form a double-layer cover structure. The light-transmitting sheet is clamped at the width-limiting through hole structure to bear a powder sample loaded in the sample box body, the sample box cover is directly screwed down after loading, the stand column moves downwards to extrude the powder sample, the use method is simple, convenient and effective, the powder sample can be fully compacted and flattened, and the influence of the loose powder sample on the test precision and stability is reduced.

Description

Technical Field

[0001] This invention belongs to the field of spectroscopic detection technology, and particularly relates to a powder sample box suitable for spectroscopic detection of Raman scattering spectroscopy, diffuse reflectance spectroscopy, and fluorescence spectroscopy. Background Technology

[0002] Powder samples are a common sample type in material spectroscopic detection. The container for powder samples must ensure sample safety while also guaranteeing the effective execution of spectroscopic measurements. Traditional powder sample containers are grooved glass slides; the powder sample is placed in the groove and covered with a coverslip. However, this structure does not effectively compact and flatten the powder sample. When repeated measurements are required, it is difficult to guarantee sample density and uniformity, leading to poor repeatability of test results. Furthermore, if the groove has a raised annular sealing edge, it cannot effectively prevent sample overflow; instead, it may result in excessive sample distribution and overflow on one side, while the other side may have missing sample.

[0003] Existing patents, such as patent number CN201820348398.1, entitled "A Powder Sample Box for Diffuse Reflectance Spectroscopy Measurement in a UV-Vis Spectrophotometer," disclose the following: A powder sample box for diffuse reflectance spectroscopy measurement in a UV-Vis spectrophotometer includes a threaded cap, a quartz window, and a sample box body for holding powder samples. The sample box body has a threaded hole and a through hole at its center, arranged from top to bottom. In use, the quartz window is positioned above the through hole in the sample box body. The sample box body holds the powder sample and is connected to the threaded hole in the sample box body via the threaded cap. In use, the quartz window is first placed in the hole inside the sample box body, the powder sample is added, the threaded cap is screwed on, and then the box is placed in the sample chamber of the instrument for UV-Vis diffuse reflectance spectroscopy testing.

[0004] In the aforementioned patent, the fine-toothed screw thread inside the sample box causes powder to adhere to the gaps in the threads when the powder sample is loaded. This makes tightening the screw cap extremely difficult, blocking the screw rotation process and preventing the powder sample from being fully compacted. Furthermore, the sample adhering to the gaps in the threads becomes firmly stuck in the gaps after being squeezed, increasing the difficulty of sample changing and cleaning. If there is too much powder sample, there may be instances where the powder sample overflows from the sample box during the tightening and compaction process. Summary of the Invention

[0005] To address the problems of existing powder sample boxes failing to adequately compact and flatten powder samples, as well as inconvenient sample placement and easy sample spillage, this invention proposes a powder sample box suitable for spectral detection. The powder sample box has a modular structure, is easy to operate, effectively prevents sample spillage, and can adequately compact and flatten powder samples, thereby improving the repeatability and stability of detection results.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows:

[0007] A powder sample box for spectral detection includes a sample box body for holding powder samples, a light-transmitting sheet, an inner sample box cover, and an outer sample box cover. The sample box body has a through hole inside, and the light-transmitting sheet is located within the through hole of the sample box body. A protruding post is fixedly connected to the bottom of the inner sample box cover, and the post extends into the through hole of the sample box body. A boss is provided on the top of the inner sample box cover, and the inner sample box cover is connected to the sample box body through a composite thread structure. A groove that mates with the boss is provided on the bottom inner side of the outer sample box cover. The inner sample box cover and the outer sample box cover form a double-layer cover structure.

[0008] Furthermore, the sample box body is a cylinder, the light-transmitting sheet is a circle, and the column fixedly connected to the bottom of the sample box inner cover is a cylinder.

[0009] Furthermore, the outer wall of the sample box body is provided with a composite external thread structure, which includes coarse external threads and fine external threads distributed sequentially from top to bottom. The pitch of the coarse external threads is greater than the pitch of the fine external threads. The through holes of the sample box body are a top through hole and a bottom through hole from top to bottom. The top through hole and the bottom through hole are interconnected, and the diameter of the top through hole is greater than the diameter of the bottom through hole, forming a width-limiting through hole structure.

[0010] Furthermore, the diameter of the light-transmitting sheet is larger than the diameter of the bottom through hole and smaller than the diameter of the top through hole, and the light-transmitting sheet carries the powder sample placed inside the sample box.

[0011] Furthermore, the light-transmitting sheet uses silicon dioxide with a purity of over 98% as the base material and is coated with a visible light anti-reflection film, resulting in a visible light transmittance of over 93%.

[0012] Furthermore, the inner cover of the sample box includes a cover body, a column is fixedly connected to the bottom of the cover body, a boss is provided on the top of the cover body, and a composite internal thread structure is provided on the inner side of the cover body. The composite internal thread structure includes coarse internal threads and fine internal threads arranged sequentially from top to bottom. The pitch of the coarse internal thread is greater than the pitch of the fine internal thread. An annular sealing gasket is provided between the coarse internal thread and the top of the inner side of the cover body.

[0013] Furthermore, the coarse internal thread engages with the coarse external thread on the outer wall of the sample box, and the fine internal thread engages with the fine external thread on the outer wall of the sample box.

[0014] Furthermore, a slot is provided on the bottom inner side of the sample box cover, and anti-slip threads are provided on the outer side of the sample box cover.

[0015] Optionally, the sample box inner cover has three protrusions on its top, arranged side-by-side at equal intervals, and the sample box outer cover has three slots on its inner bottom, the size and position of which correspond to the three protrusions. The advantages of this application are:

[0016] 1. The light-transmitting plate of this application is inserted into the width-limiting through-hole structure to carry the powder sample into the sample box. After installation, the sample box cover is tightened directly, and the column descends to compress the powder sample. The method of use is simple and effective, which can fully compact and flatten the powder sample, reducing the impact of loose powder sample on the test accuracy and stability.

[0017] 2. The composite thread structure of this application adopts a two-stage thread design. The upper coarse thread has a large pitch and fast lead, enabling rapid tightening. The lower fine thread has a small pitch and slow lead, ensuring uniform sample compaction. The numerous threads provide a certain degree of self-locking capability, preventing the sample from loosening and springing back under pressure. The thread structure is located on the outside of the sample box, ensuring that the powder sample does not directly contact the thread structure and will not obstruct the tightening process due to blockage in the thread gaps.

[0018] 3. The sample box lid of this application has a double-layered design to prevent accidental opening and increase safety during use.

[0019] 4. The inner lid of the sample box in this application is equipped with a sealing gasket to effectively prevent the powder sample from overflowing due to compression.

[0020] 5. The modular design of the sample box in this application makes it easy to replace damaged parts, reduces processing difficulty and manufacturing cost, and is easy to clean and reuse, further reducing usage costs. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the overall assembly of this application.

[0022] Figure 2 This is a schematic diagram of the overall exploded structure of this application.

[0023] Figure 3 This is a schematic cross-sectional view of the outer cover of the sample box in this application.

[0024] Figure 4 This is a schematic cross-sectional view of the inner cover of the sample box in this application.

[0025] Figure 5This is a schematic cross-sectional view of the sample box body of this application.

[0026] In the attached diagram: 1-Sample box body, 2-Transmitting sheet, 3-Sample box inner cover, 4-Sample box outer cover, 11-Coarse external thread, 12-Fine external thread, 13-Top through hole, 14-Bottom through hole, 31-Post, 32-Annular sealing gasket, 33-Coarse internal thread, 34-Fine internal thread, 35-Boss, 41-Slot, 42-Anti-slip thread. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as sides, edges, top, bottom, left, right, front, back, middle, top, bottom, tail, axial, radial, etc.) are only used to explain the relative positional relationship and motion state between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indications will also change accordingly.

[0029] Example 1

[0030] like Figures 1-2 As shown, a powder sample box for spectral detection includes a sample box body 1 for holding powder samples, a light-transmitting sheet 2, an inner sample box cover 3, and an outer sample box cover 4. The sample box body 1 has a through hole inside, and the light-transmitting sheet 2 is confined within the through hole. A protruding post is fixedly connected to the bottom of the inner sample box cover 3, extending into the through hole of the sample box body 1. A boss is provided on the top of the inner sample box cover 3. The inner sample box cover 3 is connected to the sample box body 1 via a composite threaded structure. A groove is provided on the bottom inner side of the outer sample box cover 4 to mate with the boss. The inner sample box cover 3 and the outer sample box cover 4 form a double-layer cover structure. The sample box body can be square, oval, etc., and can be customized according to the detection requirements. The light-transmitting plate of this device is held in place by the width-limiting through-hole structure to carry the powder sample into the sample box. After loading, simply tighten the sample box lid, and the column will descend to compress the powder sample. The method of use is simple and effective, and it can fully compact and flatten the powder sample, reducing the impact of loose powder sample on the test accuracy and stability.

[0031] Example 2

[0032] like Figures 1-2As shown, a powder sample box for spectral detection includes a sample box body 1 for holding powder samples, a light-transmitting sheet 2, an inner sample box cover 3, and an outer sample box cover 4. The sample box body 1 has a through hole inside, and the light-transmitting sheet 2 is confined within the through hole. A protruding post is fixedly connected to the bottom of the inner sample box cover 3, extending into the through hole of the sample box body 1. A boss is provided on the top of the inner sample box cover 3. The inner sample box cover 3 is connected to the sample box body 1 via a composite threaded structure. A groove is provided on the bottom inner side of the outer sample box cover 4 to mate with the boss. The inner sample box cover 3 and the outer sample box cover 4 form a double-layer cover structure. The sample box body can be square, oval, etc., and can be customized according to the detection requirements.

[0033] The sample box body 1 is a cylinder, the light-transmitting sheet 2 is a circular sheet with thickness, and the column fixedly connected to the bottom of the sample box inner cover 3 is a cylinder.

[0034] like Figure 5 As shown, the outer wall of the sample box body 1 is provided with a composite external thread structure, which includes coarse external threads 11 and fine external threads 12 distributed sequentially from top to bottom. The pitch of the coarse external threads is greater than the pitch of the fine external threads 12. The inner wall of the sample box body 1 is smooth, which can prevent powder samples from easily adhering to the inner wall and facilitate cleaning when changing samples. The through hole portion of the sample box body 1 consists of a top through hole 13 and a bottom through hole 14 from top to bottom. The top through hole 13 and the bottom through hole 14 are interconnected, and the diameter of the top through hole 13 is greater than the diameter of the bottom through hole 14, forming a width-limited through hole structure.

[0035] The specification of coarse external thread 11 is M20×2.5, and the specification of fine external thread 12 is M20×1.

[0036] The outer diameter of the sample box body 1 is 19~21mm, and the height is 15~17mm; the diameter of the bottom through hole 14 is 14~16mm, and the diameter of the top through hole 13 is 17~19mm. The surface finish of the inner wall of the sample box is Ra3.2. Surface finish Ra: the average roughness of the surface of a machined part. The lower the Ra value, the smoother the surface. This application requires a relatively high surface finish of Ra3.2, which can tolerate minor burrs on the surface.

[0037] The diameter of the light-transmitting sheet 2 is larger than the diameter of the bottom through-hole 14 but smaller than the diameter of the top through-hole 13. The light-transmitting sheet 2 can be placed inside the sample box and will not fall off when it is secured at the width-limiting through-hole structure, thereby holding the powder sample placed inside the sample box body 1. During spectral testing, the incident light from the light source illuminates one side of the light-transmitting sheet 2.

[0038] The thickness of the light-transmitting sheet 2 is 1~3mm, and the diameter is 16~18mm, which is larger than the diameter of the bottom through hole 14 (14~16mm) and smaller than the diameter of the top through hole 13 (17~19mm).

[0039] Furthermore, the light-transmitting sheet 2 uses silicon dioxide with a purity of over 98% as the base material, and is coated with a visible light anti-reflection film on the mirror surface. The visible light transmittance is over 93%, and the sheet is hard and not easily scratched by powder samples.

[0040] like Figure 4 As shown, the sample box inner cover 3 includes a cover body, a column 31 fixedly connected to the bottom of the cover body, a boss 35 provided on the top of the cover body, and a composite internal thread structure provided on the inner side of the cover body. The composite internal thread structure includes a coarse internal thread 33 and a fine internal thread 34 arranged sequentially from top to bottom. The pitch of the coarse internal thread 33 is greater than the pitch of the fine internal thread 34. An annular sealing washer 32 is provided between the coarse internal thread 33 and the top of the inner side of the cover body. The sample box inner cover 3 is adapted to the structure of the sample box body 1. The sample box inner cover 3 is rotated and tightened to compact and flatten the powder sample loaded in the sample box body 1, thus completing the powder sample loading. The shape and size of the column 31 are adapted to the top through hole 13 of the sample box body 1.

[0041] The diameter of the column 31 is 16~18mm, and the height of the column is 11~13mm.

[0042] The coarse internal thread 33 mates with the coarse external thread 11 on the outer wall of the sample box body 1, and the fine internal thread 34 mates with the fine external thread 12 on the outer wall of the sample box body 1; the coarse internal thread 33 has a specification of M20×2.5, and the fine external thread 12 has a specification of M20×1.

[0043] like Figure 3 As shown, a groove 41 is provided on the bottom inner side of the sample box outer cover 4, and an anti-slip thread 42 is provided on the outer side of the sample box outer cover 4. The position and size of the groove 41 are adapted to the boss 35 on the top of the sample box inner cover. The groove 41 is separated from the boss 35 in its natural state. When the sample box outer cover 4 is under pressure and the groove 41 is rotated and adjusted, the groove 41 is aligned with the boss 35 and they are engaged. Rotating the sample box outer cover 4 causes the inner cover 3 to be tightened and loosened. The anti-slip thread 42 increases the friction when rotating the sample box outer cover.

[0044] When loading the sample box, the light-transmitting sheet 2 is placed inside the through hole of the sample box body 1, tightly against the width-limiting through hole structure formed by the top through hole 13 and the bottom through hole 14, and is just locked in the width-limiting through hole structure to prevent it from falling off. The powder sample is loaded into the sample box body 1, and the light-transmitting sheet 2 carries the powder sample loaded into the sample box body 1. The column 31 of the inner cover 3 of the sample box is inserted into the through hole of the sample box body 1. The outer cover 4 of the sample box drives the inner cover 3 to rotate and compress the powder sample appropriately, making it evenly spread. Then, the composite external thread structure on the outer wall of the sample box body 1 and the composite internal thread structure on the inner side of the inner cover 3 are aligned. The column 31 moves downwards during the rotation and tightening process, gradually flattening and compacting the loose powder sample, reducing the impact of the loose powder sample on the test accuracy and stability. Since the composite thread structure is on the outside of the sample box body, and the sample is loaded inside the sample box body, the composite thread structure does not directly contact the powder sample. Therefore, the powder sample will not clog the thread gaps and hinder the rotation and tightening process. The annular sealing gasket 32 ​​prevents the compressed powder sample from leaking out from the gap between the column 31 and the inner wall of the sample box 1 during the compression process, ensuring the airtightness of the sample box. During spectral testing, the incident light from the light source illuminates the powder sample at the position of the light-transmitting plate 2, and the reflected and scattered light carrying the spectral information of the sample is emitted from the light-transmitting plate 2.

[0045] The transparent plate of this application is positioned at the width-limiting through-hole structure to hold the powder sample placed inside the sample box. After loading, the sample box lid is tightened directly, and the column descends to compress the powder sample. The method of use is simple and effective, fully compacting and flattening the powder sample, reducing the impact of loose powder on test accuracy and stability. The composite thread structure of this application adopts a two-stage thread design. The upper coarse thread has a large pitch and fast lead for rapid tightening, while the lower fine thread has a small pitch and slow lead for uniform sample compaction. The numerous threads provide a certain degree of self-locking capability, preventing the sample from loosening and springing back after being compressed. The thread structure is located on the outside of the sample box, and the powder sample does not directly contact the thread structure, thus preventing it from clogging in the thread gaps and hindering the rotation and tightening process.

[0046] The sample box lid of this application features a double-layered design to prevent accidental opening and increase safety during use. The inner lid of the sample box is equipped with a sealing gasket to effectively prevent powder samples from spilling due to compression. The modular design of the sample box facilitates the replacement of damaged parts, reduces processing difficulty and manufacturing costs, and allows for easy cleaning and reuse, further lowering operating costs.

[0047] Example 3

[0048] Based on Example 2, the number of protrusions 35 on the top of the inner cover of the sample box is 3, and the 3 protrusions 35 are arranged side by side at equal intervals. The number of slots 41 on the bottom of the inner side of the outer cover of the sample box is 3, and the position and size of the 3 slots 41 are adapted to the 3 protrusions 35.

Claims

1. A powder sample box for spectral detection, characterized in that: The sample box includes a sample box body (1) for holding powder samples, a light-transmitting sheet (2), an inner cover (3) for the sample box, and an outer cover (4) for the sample box. The sample box body (1) has a through hole inside. The light-transmitting sheet (2) is located within the through hole of the sample box body (1). A protruding column is fixedly connected to the bottom of the inner cover (3). The column extends into the through hole of the sample box body (1). A boss is provided on the top of the inner cover (3). The inner cover (3) is connected to the sample box body (1) through a composite thread structure. A groove that mates with the boss is provided on the bottom inner side of the outer cover (4). The inner cover (3) and the outer cover (4) form a double-layer cover structure.

2. The powder sample box for spectral detection according to claim 1, characterized in that: The sample box body (1) is a cylinder, the light-transmitting sheet (2) is a disc, and the bottom of the sample box inner cover (3) is fixedly connected to a column that is also a cylinder.

3. A powder sample box for spectral detection according to claim 1, characterized in that: The outer wall of the sample box body (1) is provided with a composite external thread structure, which includes a coarse external thread (11) and a fine external thread (12) distributed from top to bottom. The pitch of the coarse external thread is greater than the pitch of the fine external thread (12). The through hole portion of the sample box body (1) consists of a top through hole (13) and a bottom through hole (14) from top to bottom. The top through hole (13) and the bottom through hole (14) are interconnected, and the diameter of the top through hole (13) is greater than the diameter of the bottom through hole (14), forming a width-limited through hole structure.

4. A powder sample box for spectral detection according to claim 1, characterized in that: The diameter of the light-transmitting sheet (2) is larger than the diameter of the bottom through hole (14) and smaller than the diameter of the top through hole (13). The light-transmitting sheet (2) carries the powder sample placed inside the sample box body (1).

5. A powder sample box for spectral detection according to claim 1, characterized in that: The light-transmitting sheet (2) uses silicon dioxide with a purity of over 98% as the base material and is coated with a visible light anti-reflection film on the mirror surface, with a visible light transmittance of over 93%.

6. A powder sample box for spectral detection according to claim 1, characterized in that: The inner cover (3) of the sample box includes a cover body, a column (31) is fixedly connected to the bottom of the cover body, a boss (35) is provided on the top of the cover body, and a composite internal thread structure is provided on the inner side of the cover body. The composite internal thread structure includes a coarse internal thread (33) and a fine internal thread (34) arranged sequentially from top to bottom. The pitch of the coarse internal thread (33) is greater than the pitch of the fine internal thread (34). An annular sealing gasket (32) is provided between the coarse internal thread (33) and the top of the inner side of the cover body.

7. A powder sample box for spectral detection according to claim 6, characterized in that: The coarse internal thread (33) engages with the coarse external thread (11) on the outer wall of the sample box body (1), and the fine internal thread (34) engages with the fine external thread (12) on the outer wall of the sample box body (1).

8. A powder sample box for spectral detection according to claim 6, characterized in that: The bottom inner side of the sample box cover (4) is provided with a slot (41), and the outer side of the sample box cover (4) is provided with anti-slip threads (42).

9. A powder sample box for spectral detection according to claim 8, characterized in that: The sample box inner cover has three protrusions (35) on the top, and the three protrusions (35) are arranged side by side at equal intervals. The sample box outer cover (4) has three slots (41) on the bottom inside, and the position and size of the three slots (41) are adapted to the three protrusions (35).

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