Auxiliary background table for near-infrared spectrometer

Abstract

The utility model relates to an auxiliary background platform for a near-infrared spectrometer, and belongs to the technical field of spectrometer auxiliary devices. The bottom end of the fixed supporting frame is a fixable metal base, the background table top is fixedly installed at the top end of the fixed supporting frame, a compressed air purging valve is installed on the side edge of the background table top, an air inlet valve and an air outlet valve are arranged in the compressed air purging valve, the air inlet valve is located at the air inlet end of the compressed air purging valve and located in the middle of the air inlet end, and the air outlet valve is located in the middle of the air outlet end. And the air inlet valve is communicated with a compressed air supply source through an air inlet pipe, the air outlet valves are uniformly arranged at the air outlet end of the compressed air purging valve, and the air inlet valve is communicated with the air outlet valves through a compressed air transition cavity. The adjustable lifting support is adopted, flexible adjustment can be achieved according to the height of a scanned target object and the scanning requirement, a plurality of air outlet valve ports are formed in the outlet end of the compressed air purging valve, compressed air flow can be buffered and evenly distributed, and the air flow purging area is larger.

Description

Technical Field

[0001] The utility model belongs to the technical field of spectrometer auxiliary devices, and in particular relates to an auxiliary background table for a near-infrared spectrometer. Background Art

[0002] Near-infrared spectroscopy is a modern analytical technique that uses spectroscopic measurements in the near-infrared (780nm-2,526nm) region. It is primarily used for the direct and rapid analysis of complex organic samples. Reconstituted tobacco is a crucial raw material in cigarette production, and its quality stability directly impacts cigarette quality. With the increasing demand for high-quality cigarette development, higher standards for raw material quality are also being placed on this material. Near-infrared spectroscopy is widely used in reconstituted tobacco production, ensuring precise, stable, and reliable product quality control throughout the production process.

[0003] Spectral measurements require background scanning. The purpose of collecting background signals is to obtain a baseline spectrum and subtract interference signals from the sample scan. The background collected during the detection process directly affects the accuracy of the sample test data. The detection background determines the light reflection distance (optical path) and affects the intensity of diffusely reflected light. When used for monitoring papermaking reconstituted tobacco production, some monitoring points may have empty samples without a conveyor belt or other background scanning surface. Even if some monitoring points have a table as a background, the production process easily generates a large amount of dust, which covers the background table, making it impossible to provide a stable and reliable background table during the scanning process. Therefore, there is a lack of a fixed background scanning table for near-infrared spectrometers.

[0004] Therefore, it is necessary to provide an auxiliary background platform for near-infrared spectrometer to provide a stable background for near-infrared spectrum scanning and provide a guarantee for online monitoring of the production line. Utility Model Content

[0005] In order to overcome the problems existing in the background technology, the utility model provides an auxiliary background platform for a near-infrared spectrometer, which provides a stable background for near-infrared spectrum scanning and provides a guarantee for online monitoring of the production line.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0007] The utility model provides an auxiliary background table for a near-infrared spectrometer, comprising a fixed support frame 1, a background table top 2 and a compressed air purge valve 3; the bottom end of the fixed support frame 1 is a fixable metal base 4, the background table top 2 is fixedly installed on the top of the fixed support frame 1, and a compressed air purge valve 3 is installed on the side of the background table top 2, and an air inlet valve 31 and an air outlet valve 32 are arranged in the compressed air purge valve 3, the air inlet valve 31 is located at the air inlet end of the compressed air purge valve 3 and is in the middle position of the air inlet end, and is connected to the compressed air supply source through the air inlet pipe 33, the air outlet valve 32 is evenly arranged at the air outlet end of the compressed air purge valve 3, and the air inlet valve 31 and the air outlet valve 32 are connected through a compressed air transition cavity 34.

[0008] Preferably, the fixed support frame 1 is an adjustable lifting frame.

[0009] Preferably, the background table 2 is made of a material that does not change with changes in ambient temperature and humidity.

[0010] Preferably, the compressed air transition chamber 34 is an isosceles triangle structure, the air inlet valve 31 is installed at the top corner of the isosceles triangle structure, and the air outlet valves 32 are evenly distributed on the bottom edge of the isosceles triangle structure.

[0011] Beneficial effects of the utility model:

[0012] The utility model adopts an adjustable lifting bracket, which can be flexibly adjusted according to the height of the scanning target and the scanning requirements. The outlet end of the compressed air purge valve is provided with multiple air outlet valve ports, which can buffer the compressed air flow and make the air flow evenly distributed. The air flow sweeping area is larger, providing a stable background for near-infrared spectral scanning and providing protection for online monitoring of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic structural diagram of the compressed air purge valve of the utility model.

[0015] In the figure, 1-fixed support frame, 2-background table, 3-compressed air purge valve, 4-metal base, 31-inlet valve, 32-outlet valve, 33-inlet pipe, 34-compressed air transition chamber. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0017] like Figure 1-2As shown, the auxiliary background table for the near-infrared spectrometer includes a fixed support frame 1, a background table top 2 and a compressed air purge valve 3; the fixed support frame 1 is an adjustable lifting bracket, and the height can be adjusted according to the distance requirement of scanning the background during use. The bottom end of the fixed support frame 1 is a fixable metal base 4, and the background table top 2 is fixedly installed on the top of the fixed support frame 1. The background table top 2 is made of a material that will not change according to changes in ambient temperature and humidity, and ceramic material can be selected. A compressed air purge valve 3 is installed on the side of the background table top 2.

[0018] The compressed air purge valve 3 is provided with an air inlet valve 31 and an air outlet valve 32. The air inlet valve 31 is located at the air inlet end of the compressed air purge valve 3 and is in the middle position of the air inlet end, and is connected to the compressed air supply source through the air inlet pipe 33. The air outlet valve 32 is evenly arranged at the air outlet end of the compressed air purge valve 3. The air inlet valve 31 and the air outlet valve 32 are connected through a compressed air transition cavity 34. The compressed air transition cavity 34 is an isosceles triangle structure. The air inlet valve 31 is installed at the top corner of the isosceles triangle structure, and the air outlet valves 32 are evenly distributed on the bottom edge of the isosceles triangle structure.

[0019] The purpose of providing multiple outlet valves 32 is to act as a buffer when the compressed air flow is large, and the degree of purge of the compressed air purge valve 3 can be controlled by the closing and opening of the multiple outlet valves 32. After the compressed air passes through the compressed air purge valve 3, the airflow is buffered and evenly distributed, and the target object will not be shaken by the airflow, which would affect the scanning results. The production site is dusty and easily accumulates dust after a period of time. When the compressed air enters this valve, it is evenly distributed throughout the valve body, and the airflow sweeps a larger area, making it easier to clean the background table. The isosceles triangle structure of the compressed air transition chamber 34 can ensure a more uniform distribution of the compressed air.

[0020] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An auxiliary background stage for a near-infrared spectrometer, characterized by: The auxiliary background table for a near-infrared spectrometer comprises a fixed support frame (1), a background table (2) and a compressed air purge valve (3); the bottom end of the fixed support frame (1) is a fixable metal base (4), the background table (2) is fixedly mounted on the top of the fixed support frame (1), a compressed air purge valve (3) is mounted on the side of the background table (2), an air inlet valve (31) and an air outlet valve (32) are arranged in the compressed air purge valve (3), the air inlet valve (31) is located at the air inlet end of the compressed air purge valve (3) and is in the middle of the air inlet end, and is connected to a compressed air supply source through an air inlet pipe (33), the air outlet valve (32) is evenly arranged at the air outlet end of the compressed air purge valve (3), and the air inlet valve (31) and the air outlet valve (32) are connected through a compressed air transition cavity (34).

2. The auxiliary background stage for a near-infrared spectrometer according to claim 1, characterized in that: The fixed support frame (1) is an adjustable lifting frame.

3. The auxiliary background stage for a near-infrared spectrometer according to claim 1 or 2, characterized in that: The background table (2) is made of a material that does not change with changes in ambient temperature and humidity.

4. The auxiliary background stage for a near-infrared spectrometer according to claim 1 or 2, characterized in that: The compressed air transition chamber (34) is an isosceles triangle structure, the air inlet valve (31) is installed at the top corner of the isosceles triangle structure, and the air outlet valves (32) are evenly distributed on the bottom edge of the isosceles triangle structure.

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