Solid off-line near-infrared spectrometer

Abstract

The utility model relates to a solid off-line near-infrared spectrometer which comprises a spectrometer shell, a sample cup and a weight, an infrared detection probe is arranged on the upper end face of the spectrometer shell, the solid off-line near-infrared spectrometer further comprises a guide seat arranged on the upper end face of the spectrometer shell, a vertical guide hole is formed in the guide seat, the sample cup is arranged in the guide hole, and the weight is arranged on the sample cup. A guide hole is formed in the upper end face of the spectrograph shell, an annular supporting table for supporting the sample cup is arranged on the inner wall of the guide hole, the guide hole and the infrared detection probe are eccentrically arranged, a protrusion is arranged on the upper end face of the spectrograph shell, and a groove matched with the protrusion is formed in the bottom of the guide seat. The sample cup is placed in the guide hole of the guide seat, and the sample cup can be rotated by a certain angle to realize multi-point detection when multiple times of detection are carried out, so that the problem of repeated detection or position deviation is avoided, and the precision of multi-point detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spectrometers, in particular to a solid off-line near-infrared spectrometer. Background Art

[0002] Modern near-infrared spectroscopy (NIR) analysis technology is a high-tech science and technology that has developed rapidly in the field of analytical chemistry in recent years. Near-infrared light refers to electromagnetic waves with a wavelength range of 780 - 2526 nm. The near-infrared spectral absorption of general organic substances in this region is mainly the overtone and combination frequency absorption of hydrogen-containing groups (OH, CH, NH, SH, PH). Signals of the main structures and compositions of almost all organic substances can be found in their near-infrared spectra, and the spectra are stable. Moreover, it is easy to operate, fast in analysis, and can reflect the state of the measured object in real time; it does not damage the sample and can directly perform measurements without any pretreatment on the sample, making it suitable for on-site and on-line detection.

[0003] Off-line detection is to take the material out of the production line and place it on a near-infrared spectrometer for detection. When using a near-infrared spectrometer to perform off-line detection on solid materials, the solid materials are generally placed in a sample cup such as that in CN209764717U - a micro near-infrared spectrometer transmission and reflection sample measuring device. The bottom of the sample cup is a transparent sapphire plate, and the solid material is pressed tightly by a weight. Then, the sample cup is placed on the upper end of the spectrometer housing, and the infrared detection probe is oriented towards the sapphire plate at the bottom of the sample cup, so as to detect the internal solid material through the sapphire plate. In order to improve the detection accuracy, it is generally necessary to move the position of the sample cup to achieve multi-point detection. However, during the movement process, since the position of the infrared detection probe cannot be seen, it is possible to move to a position where the infrared detection probe is oriented towards the wall of the sample cup, resulting in detection errors, or the position coincides with the previous position after multiple movements, failing to achieve the effect of multi-point detection. Summary of the Utility Model

[0004] The utility model aims at the deficiencies of the prior art and provides a solid off-line near-infrared spectrometer.

[0005] The utility model is realized by the following technical solutions. A solid off-line near-infrared spectrometer is provided, which includes a spectrometer housing, a sample cup, and a weight. An infrared detection probe is installed on the upper end surface of the spectrometer housing. It further includes a guide seat placed on the upper end surface of the spectrometer housing. A vertical guide hole is opened on the guide seat, and the sample cup is placed in the guide hole. An annular support platform for supporting the sample cup is provided on the inner wall of the guide hole. The guide hole is eccentrically arranged with respect to the infrared detection probe.

[0006] During detection, pour the solid material into the sample cup, compact it by means of weights, place the guiding seat on the upper end face of the spectrometer housing, place the sample cup in the guiding hole of the guiding seat, and support it by the annular support platform. When performing multiple detections, the sample cup can be rotated by a certain angle. Since the guiding hole and the infrared detection probe are eccentrically arranged, another position at the bottom of the sample cup corresponds to the infrared detection probe, realizing multi-point detection.

[0007] As an optimization, a protrusion is provided on the upper end face of the spectrometer housing, and a groove adapted to the protrusion is provided at the bottom of the guiding seat. In this solution, the protrusion on the upper end face of the spectrometer housing is inserted into the groove at the bottom of the guiding seat to realize the positioning of the guiding seat and prevent it from moving.

[0008] As an optimization, the infrared detection probe is arranged on the protrusion.

[0009] As an optimization, the protrusion is a rectangular protrusion. Thus, it is non-circular to prevent the guiding seat from rotating.

[0010] As an optimization, the guiding seat is of a hollow structure, a vertical round hole is provided on the guiding seat, a guiding tube is fixedly connected in the round hole, the inner hole of the guiding tube is the guiding hole, and the annular support platform is arranged in the guiding tube. Thus, it is convenient for the processing of the guiding seat and reduces the processing cost.

[0011] As an optimization, the annular support platform is arranged at the lower end of the guiding hole, and the height of the annular support platform is 0.3 - 2 mm. This keeps a very small distance between the bottom of the sample cup and the infrared detection probe, does not affect the detection result, and does not wear the infrared detection probe.

[0012] As an optimization, the height of the guiding seat is less than the height of the sample cup. This is convenient for holding the upper end of the sample cup to rotate the sample cup.

[0013] The beneficial effects of the present utility model are as follows: For a solid off-line near-infrared spectrometer of the present utility model, pour the solid material into the sample cup, place the guiding seat on the upper end face of the spectrometer housing, place the sample cup in the guiding hole of the guiding seat. When performing multiple detections, the sample cup can be rotated by a certain angle to realize multi-point detection, thus avoiding the problems of repeated detection or offset position and improving the accuracy of multi-point detection. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present utility model;

[0015] Figure 2 It is an explosion diagram of the present utility model;

[0016] Figure 3 It is a front view of the present utility model;

[0017] Figure 4 For the present utility modelFigure 3 Cross-sectional view taken along the A-A plane in the middle

[0018] Figure 5 Schematic diagram of the bottom structure of the guiding seat of the present utility model

[0019] As shown in the figure

[0020] 1. Spectrometer housing, 2. Switch button, 3. Infrared detection probe, 4. Protrusion, 5. Sample cup, 6. Weight, 7. Guiding seat, 8. Annular support platform, 9. Guiding tube, 10. Groove Specific implementation mode

[0021] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation modes

[0022] As Figures 1 - 5 shown, a solid off-line near-infrared spectrometer of the present utility model includes a spectrometer housing 1, a sample cup 5 and a weight 6. The spectrometer housing 1 is composed of an upper housing and a lower housing connected by bolts and contains a circuit board inside. An infrared detection probe 3 is installed on the upper end face of the spectrometer housing 1, and the upper end face of the infrared detection probe 3 is in contact with the upper end face of the spectrometer housing 1, thereby reducing the contact distance with the material and improving the detection accuracy. The infrared detection probe 3 is located in the middle of the upper end face of the spectrometer housing 1. A switch button is provided at a corner of the upper end face of the spectrometer housing 1 to control the detection

[0023] The sample cup 5 includes a metal round tube and a sapphire plate bonded to the lower end of the round tube. In this embodiment, the wall thickness of each part of the sample cup 5 is equal. The outer diameter of the weight 6 is slightly smaller than the inner diameter of the sample cup 5, so it can be placed in the sample cup 5 to press the material tightly, making the material in close contact with the sapphire plate

[0024] It also includes a guiding seat 7 placed on the upper end face of the spectrometer housing 1. The guiding seat 7 is of a rectangular structure and its size is smaller than that of the spectrometer housing 1. A vertical guiding hole is opened on the guiding seat 7. The guiding hole is a round hole and vertically penetrates the guiding seat 7. The inner diameter of the guiding hole is slightly larger than the outer diameter of the sample cup 5. The sample cup 5 is placed in the guiding hole, and the guiding hole and the infrared detection probe 3 are eccentrically arranged. The height of the guiding seat 7 is smaller than the height of the sample cup 5, which is convenient for holding the upper end of the sample cup to rotate the sample cup 5

[0025] An annular support platform 8 for supporting the sample cup 5 is provided on the inner wall of the guiding hole. The annular support platform 8 is arranged at the lower end of the guiding hole, and the height of the annular support platform 8 is 0.3 - 2 mm, so that there is a very small distance between the bottom of the sample cup and the infrared detection probe, which does not affect the detection result and will not wear the infrared detection probe

[0026] In this embodiment, the guide base 7 is of a hollow structure. A vertical round hole is formed in the guide base 7, and the round hole penetrates through the guide base 7. A guide tube 9 is fixedly connected in the round hole. The upper and lower end faces of the guide tube 9 are flush with the upper and lower end faces of the guide base 7 respectively. The inner hole of the guide tube 9 is a guide hole. The annular support platform 8 is arranged in the guide tube 9. In this embodiment, the annular support platform 8 and the guide tube 9 are integrally formed.

[0027] A protrusion 4 is provided on the upper end face of the spectrometer housing 1. The protrusion 4 is a rectangular protrusion. The height of the protrusion 4 is 2-5 mm. The infrared detection probe 3 is arranged on the protrusion 4, and the upper end face of the infrared detection probe 3 is flush with the upper end face of the protrusion 4.

[0028] A groove 10 adapted to the protrusion 4 is provided at the bottom of the guide base 7. The protrusion on the upper end face of the spectrometer housing is inserted into the groove at the bottom of the guide base to position the guide base and prevent it from moving.

[0029] The usage method of the present utility model:

[0030] During detection, solid materials (generally powders) are poured into the sample cup 5 and compacted by the weights 6. The guide base is placed on the upper end face of the spectrometer housing 1, and the protrusion 4 on the upper end face of the spectrometer housing 1 is inserted into the groove 10 at the bottom of the guide base 7 to position the guide base and prevent it from moving.

[0031] The sample cup 5 is placed in the guide hole of the guide base 7 and supported by the annular support platform 8, so that the bottom of the sample cup 5 keeps a very small distance from the infrared detection probe 3, which does not affect the detection result and will not wear the infrared detection probe 3. Press the switch button 2 to perform a detection, and then rotate the sample cup 5 by a certain angle. Since the guide hole and the infrared detection probe 3 are eccentrically arranged, another position of the bottom of the sample cup 5 corresponds to the infrared detection probe 3, and then a second detection is performed. Repeat the above steps to achieve multiple detections.

[0032] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of the claims of the present utility model.

Claims

1. A solid off-line near-infrared spectrometer, comprising a spectrometer housing (1), a sample cup (5) and weights (6), wherein an infrared detection probe (3) is installed on the upper end face of the spectrometer housing (1), and is characterized in that: It further includes a guiding seat (7) placed on the upper end face of the spectrometer housing (1). A vertical guiding hole is formed in the guiding seat (7), and the sample cup (5) is placed in the guiding hole. An annular supporting platform (8) for supporting the sample cup (5) is arranged on the inner wall of the guiding hole, and the guiding hole is eccentrically arranged with the infrared detection probe (3).

2. The solid off-line near-infrared spectrometer according to claim 1, characterized in that: A protrusion (4) is arranged on the upper end face of the spectrometer housing (1), and a groove (10) adapted to the protrusion (4) is arranged at the bottom of the guiding seat (7).

3. The solid off-line near-infrared spectrometer according to claim 2, wherein: The infrared detection probe (3) is arranged on the protrusion (4).

4. The solid off-line near-infrared spectrometer according to claim 2, wherein: The protrusion (4) is a rectangular protrusion.

5. A solid off-line near-infrared spectrometer according to claim 1, characterized in that: The guiding seat (7) is of a hollow structure. A vertical circular hole is formed in the guiding seat (7), and a guiding tube (9) is fixedly connected in the circular hole. The inner hole of the guiding tube (9) is the guiding hole, and the annular supporting platform (8) is arranged in the guiding tube (9).

6. A solid off-line near-infrared spectrometer according to claim 1, characterized in that: The annular supporting platform (8) is arranged at the lower end of the guiding hole, and the height of the annular supporting platform (8) is 0.3 - 2 mm.

7. The solid off-line near-infrared spectrometer according to claim 1, wherein: The height of the guiding seat (7) is less than the height of the sample cup (5).

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