Liquid containing device for near-infrared analysis of liquid

Abstract

The utility model belongs to the field of devices facilitating optical testing, and particularly relates to a liquid containing device for liquid near-infrared analysis. In order to form a stable optical path and prevent liquid from overflowing out of a cup body, the utility model provides a liquid containing device for liquid near-infrared analysis. The liquid containing device for liquid near-infrared analysis comprises a cup body and an adjusting container, wherein the cup body and the adjusting container form a communicating vessel with the two ends communicated with the atmosphere, and the cup body is provided with a cup cover used for pressing liquid downwards to enable redundant liquid to enter the adjusting container; the bottom of the cup body is provided with a light-transmitting piece, and the bottom of the cup cover is provided with a reflector. When the cup body is covered with the cup cover, the cup cover presses liquid downwards under the action of the gravity of the cup cover, redundant liquid enters the adjusting container, and therefore the liquid is prevented from overflowing; meanwhile, the cup cover covers the cup body, so that a stable optical path is formed between the reflecting mirror surface and the light-transmitting sheet.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the device field convenient for optical testing, especially relates to a liquid holding device for liquid near-infrared analysis. BACKGROUND

[0002] Near-infrared spectroscopy technology is a simple, efficient, low-cost green analysis technology, and near-infrared spectroscopy technology can realize rapid, non-destructive detection and online analysis of a large number of samples, therefore, near-infrared spectroscopy technology is currently used to detect liquid samples.

[0003] The basic principle of using near-infrared spectroscopy technology to detect liquid is Beer's law, that is, absorbance = absorption coefficient * optical path * concentration, therefore, the optical path is one of the parameters that must be controlled during detection.

[0004] During detection, a liquid holding device for holding liquid is needed, for example, the Chinese utility model patent with the authorization announcement number CN209764717U and the authorization announcement date of 2019.12.10 discloses a micro near-infrared spectroscopy transmission and reflection sample measuring device, the sample measuring device includes a sample cup and a weight (equivalent to a cup cover), the bottom of the sample cup is a sapphire with high light transmittance (equivalent to a light transmission sheet), the bottom of the weight is mirror finished to form a mirror surface, and the sample cup has a step for supporting the weight.

[0005] As understood by those skilled in the art, the reason why the sapphire is arranged at the bottom of the sample cup instead of the whole sample cup being made of a light transmission material is that the material of other parts of the sample cup must be opaque to prevent the spectrometer from receiving the reflected optical signal and prevent external natural light from penetrating the sample cup to reach the spectrometer, thereby avoiding detection failure.

[0006] During use, first, an appropriate amount of liquid is injected into the sample cup; then, the weight is covered on the sample cup (equivalent to the cup cover being covered on the sample cup), at this time, the distance between the mirror surface and the sapphire is fixed, so the height of the liquid is fixed, that is, the optical path is fixed.

[0007] However, when using the above sample measuring device, if too little liquid is added in advance (that is, the initial height of the liquid surface is too low), that is, the weight does not contact the liquid, at this time, the optical path is the actual height of the liquid surface, not the maximum height of the liquid that can be contained after the sample cup cooperates with the weight, which leads to the inability to determine the height of the liquid (that is, the optical path of the liquid cannot be determined).

[0008] To overcome the above problems, excessive liquid is generally added in advance in practice. At this time, although the weight can directly determine the optical path of the liquid (which matches the maximum height of the liquid that can be contained after the sample cup cooperates with the weight), however, the excess liquid will overflow the sample cup and flow around. UTILITY MODEL CONTENT

[0009] The utility model discloses a liquid near infrared analysis liquid containing device, to solve the technical problem of liquid overflow sample cup and everywhere disorder flow when using the existing sample device.

[0010] To achieve the above object, the utility model provides a liquid near infrared analysis liquid containing device technical scheme is:

[0011] A liquid near infrared analysis liquid containing device, including the cup body and the adjusting container that constitute the communicating vessel with both ends and atmosphere communication, the cup body is equipped with the cup cover for pressing down the liquid to make the excess liquid into the adjusting container, the bottom of cup body has the light -transmitting sheet, and the bottom of cup cover has the mirror surface.

[0012] Further, the cup cover or the cup body is equipped with the sealing ring for realizing the sealing cooperation between cup cover and cup body.

[0013] Further, the cup cover includes a cover body and a limiting protrusion arranged on a side surface of the cover body, and the upper surface of the cup body is provided with a limiting groove matched with the limiting protrusion, a groove bottom wall of the limiting groove is used for limiting cooperation with the limiting protruous to limit the distance between the mirror surface and the light-transmitting sheet.

[0014] Further, the number of the limiting grooves is at least two, and the depths of the at least two limiting grooves are different, so that the distance between the mirror surface and the light-transmitting sheet is different when the limiting protrusion cooperates with the limiting grooves of different depths.

[0015] Further, the cup body is a hollow cylindrical cup body, the cover body is a cylindrical cover body, and the limiting protrusion is arranged on an outer circumferential surface of the cover body.

[0016] Further, the number of the limiting protrusions is at least two, and the limiting protrusions are uniformly distributed on the side surface of the cover body.

[0017] Further, the adjusting container is provided with an indicating mark for indicating the liquid level.

[0018] Further, the adjusting container is made of a light-transmitting material, and the indicating mark is arranged on an outer wall surface of the adjusting container.

[0019] Further, the adjusting container is provided with a monitoring device for monitoring the liquid level.

[0020] Further, the volumes of the adjusting container and the cup body satisfy that the height of unit volume of liquid in the cup body is less than the height of unit volume of liquid in the adjusting container.

[0021] The liquid containing device for liquid near-infrared analysis has the advantages that: the utility model is an opening invention. The main difference between the utility model and the prior art is that: in the prior art, the container for containing liquid is a sample cup, and the sample cup is provided with a cup cover; while in the utility model, the container for containing liquid is a communicating vessel, and the communicating vessel comprises a cup body and an adjusting container, and the cup body is provided with a cup cover.

[0022] Based on the above difference, when the liquid containing device for liquid near-infrared analysis in the utility model is actually used, first, an excess of liquid is added into the communicating vessel; then, the cup cover is covered on the cup body, the cup cover is pressed downward under the action of its own gravity, and the excess liquid is caused to enter the adjusting container, so that the liquid is prevented from overflowing; and then, the spectrometer is opened, near-infrared light reaches the liquid through the light transmission sheet, and is reflected by the mirror surface again to return to the spectrometer through the light transmission sheet. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a front view of the liquid containing device for liquid near-infrared analysis of the utility model;

[0024] Fig. 2 is a structural schematic view of the liquid containing device for liquid near-infrared analysis of the utility model;

[0025] Fig. 3 is a sectional view of the communicating vessel of the liquid containing device for liquid near-infrared analysis of the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, cup body; 11, limiting groove; 2, cup cover; 21, cover body; 22, limiting protrusion; 23, handle; 3, sealing ring; 4, communicating pipe; 5, adjusting container; 51, indicating scale. DETAILED DESCRIPTION

[0028] To solve the problems in the background art, the core inventive concept of the utility model is that: the excess liquid is collected into a non-test container (i.e. the adjusting container) by using the communicating vessel principle, so that the liquid is prevented from overflowing.

[0029] The utility model will be further described in detail in combination with the embodiments.

[0030] The specific embodiments of the liquid containing device for liquid near-infrared analysis provided by the utility model are as follows:

[0031] REFERENCE Figs. 1-3As shown, as a basic embodiment, the liquid holding device for liquid near-infrared analysis comprises a cup body 1 and an adjusting container 5, which constitute a communicating vessel with both ends communicating with the atmosphere, the cup body 1 is provided with a cup cover 2 for pressing the liquid downward to make the excess liquid enter the adjusting container 5; the bottom of the cup body 1 is provided with a light transmission sheet, and the bottom of the cup cover 2 is provided with a mirror surface.

[0032] The adjusting container 5 can be a container with any shape (including special shape) such as a tube, a cup or a tank, as long as it can hold liquid and constitute a communicating vessel with the cup body 1; in order to facilitate the staff to operate the cup cover 2, the cup cover 2 further comprises a handle 23 for holding by hand.

[0033] In Figs. 1-3 In the preferred embodiment, the cup cover 2 is provided with a sealing ring 3 for realizing the sealing cooperation between the cup cover 2 and the cup body 1.

[0034] Of course, in other embodiments, the sealing ring 3 can not be provided, or the sealing ring 3 can be provided on the cup body 1.

[0035] The same as the prior art, the bottom of the cup body 1 is provided with a light transmission sheet, and the bottom of the cup cover 2 is provided with a mirror surface, which will not be described here; different from the prior art, the above technical solution of the utility model further comprises the concepts of communicating vessel and sealing ring 3, and the following will introduce the contents related to these concepts.

[0036] The communicating vessel will be introduced below.

[0037] Referring to Figs. 1-3 As shown, the communicating vessel can be integrally formed by using non-light transmission material, and a single chamber is divided into two chambers by a partition plate, one of the chambers corresponds to the chamber of the cup body 1, and the other chamber corresponds to the chamber of the adjusting container 5, and the partition plate is provided with a communicating hole for communicating the two chambers; or, the communicating vessel is formed by connecting two containers by a communicating pipe 4, and the part of the cup body 1 except the light transmission sheet is made of non-light transmission material, since the near-infrared light basically does not go out from the adjusting container 5, the adjusting container 5 can be made of light transmission material or non-light transmission material, and the communicating pipe 4 can be made of light transmission material or non-light transmission material. The communicating pipe 4 can be integrally formed with the adjusting container 5 or manufactured separately from the adjusting container 5.

[0038] Preferably, the inner wall surface of the cup body 1 is coated with a mirror surface reflection coating, or the cup body 1 is made of a mirror surface reflection material, and the inner wall surface of the cup body 1 constitutes a mirror surface, so that the near-infrared light can better return to the spectrometer.

[0039] As a preferred embodiment, the volumes of the adjusting container 5 and the cup body 1 satisfy that the height of unit volume of liquid in the cup body 1 is less than the height of unit volume of liquid in the adjusting container 5.

[0040] According to the principle of communicating vessels, when adding liquid, the liquid levels in the adjusting container 5 and the cup body 1 are made to be level, so that the height of a unit volume of liquid in the cup body 1 is less than the height in the adjusting container 5. This reduces the proportion of liquid in the adjusting container 5 to the total liquid, thus saving liquid usage.

[0041] Of course, in other specific embodiments, the height of the liquid per unit volume inside the cup body 1 can also be greater than the height inside the regulating container 5. In this case, the liquid holding device for near-infrared analysis can also be used normally.

[0042] The following describes the technical solution that does not include a sealing ring 3.

[0043] Referring to the Chinese utility model patent with authorization announcement number CN209764717U, in one specific embodiment, the contact surface between the cup lid 2 and the cup body 1 is an annular contact surface. When the cup lid 2 is placed on the cup body 1, under the action of the cup lid 2's own weight, the contact surface between the cup lid 2 and the cup body 1 is tightly attached. The difficulty of liquid overflowing from between the cup lid 2 and the cup body 1 is much greater than the difficulty of liquid entering the regulating container 5. Therefore, the liquid will enter the regulating container 5 and will not overflow from between the cup lid 2 and the cup body 1.

[0044] This principle is the same as the principle behind the phenomenon that when you press the lid 2 firmly onto the body 1 and then flip the body 1 over, the liquid will not flow out between the lid 2 and the body 1, so it will not be elaborated here.

[0045] In other specific embodiments, refer to Figs. 1-3 As shown, the inner wall of the cup lid 2 and the cup body 1 are fitted with a small gap to form a surface tension valve between the cup lid 2 and the cup body 1. It is much more difficult for the liquid to flow through the surface tension valve than for the liquid to enter the regulating container 5. Therefore, the liquid will enter the regulating container 5 and will not overflow from between the cup lid 2 and the cup body 1.

[0046] The following describes the scheme for setting the sealing ring 3.

[0047] An installation groove can be provided on the outer wall of the cup lid 2 or the inner wall of the cup body 1. The sealing ring 3 is installed in the installation groove. When the cup lid 2 is placed on the cup body 1, the sealing ring 3 can achieve a seal between the cup lid 2 and the cup body 1, thereby preventing liquid from overflowing from between the cup body 1 and the cup lid 2.

[0048] As a preferred embodiment, the cup lid 2 includes a lid body 21 and a limiting protrusion 22 arranged on the side of the lid body 21. The upper surface of the cup body 1 is provided with a limiting groove 11 that matches the limiting protrusion 22. The bottom wall of the limiting groove 11 is used to limit the limiting protrusion 22 to restrict the distance between the reflective mirror and the light-transmitting sheet. The structure is simple and can restrict the circumferential rotation of the lid body 21.

[0049] In this specific embodiment, the contact surface between the cover body 21 and the cup body 1 is only the contact surface between the limiting protrusion 22 and the bottom wall of the limiting groove 11; when adding liquid, the liquid level should not reach the limiting groove 11, that is, the liquid level is lower than the limiting groove 11.

[0050] The lid body 21 can be fitted with the cup body 1 with a clearance to form a surface tension valve; or, a sealing ring 3 is provided on the lid body 21 or the cup body 1. When the sealing ring 3 is provided on the lid body, preferably, the sealing ring 3 is located below the limiting protrusion 22 to prevent liquid from entering the limiting groove 11 when pressed; when the sealing ring 3 is provided on the cup body 1, preferably, the sealing ring 3 is located below the limiting groove 11 to prevent liquid from entering the limiting groove 11 when pressed.

[0051] The following describes how to use the above-described specific implementation methods.

[0052] In actual use of the above-mentioned liquid holding device for near-infrared analysis, firstly, add an excess of liquid into the communicating vessel; then, place the lid 2 on the body 1, and the lid 2 presses down on the liquid under its own weight, causing the excess liquid to enter the regulating container 5, thereby preventing the liquid from overflowing; then, turn on the spectrometer, and the near-infrared light reaches the liquid through the light-transmitting plate, and returns to the spectrometer again through the light-transmitting plate under the reflection of the reflective mirror.

[0053] When adding liquid into the communicating vessel, the liquid can be added through the inlet of the cup body 1 or through the inlet of the regulating container 5. When the regulating container 5 is a container with a small flow cross-section, such as a thin tube, it is preferable to add liquid through the inlet of the cup body 1 to increase the liquid addition rate.

[0054] In the above specific embodiments, a single liquid near-infrared analysis container can only correspond to one optical path. When detecting data of the same liquid under different optical paths, multiple liquid near-infrared analysis containers corresponding to different optical paths are required, which is costly and not conducive to on-site management.

[0055] To overcome the above problems, such as Figs. 2-3 As shown, in a preferred embodiment, the number of limiting grooves 11 is at least two, and at least two of the limiting grooves 11 have different depths, so as to make the distance between the reflective mirror and the light-transmitting sheet different when the limiting protrusion 22 cooperates with the limiting grooves 11 of different depths.

[0056] The number of limiting grooves 11 can be two, three or more, and the depth of the limiting grooves 11 can be two, three or more. The depth of all limiting grooves 11 can be different, or some limiting grooves 11 can have the same depth and some limiting grooves 11 can have different depths.

[0057] In use, the staff adjusts the distance between the mirror surface and the light-transmitting sheet (i.e. the optical path) by matching the limiting protrusion 22 with the limiting grooves 11 of different depths according to actual needs. Since a single liquid-holding device for near-infrared analysis can correspond to at least two optical paths, the types and quantities of the liquid-holding devices for near-infrared analysis on site can be effectively reduced, the cost is lowered, and the on-site management is facilitated.

[0058] In a specific embodiment, the cup body 1 is a hollow cuboid cup body 1, the cover body 21 is a cuboid cover body 21, and the limiting protrusion 22 is arranged on one of the front, rear, left, and rear sides of the cover body 21.

[0059] In use, the cup cover 2 can only be directly placed on the cup body 1 or placed on the cup body 1 after being rotated by 180° due to the shapes of the cup cover 2 and the cup body 1, and cannot be placed on the cup body 1 after being rotated by 30° or other angles, so the number of the limiting grooves 11 can only be two, and the liquid-holding device for near-infrared analysis can only be applicable to two optical paths.

[0060] Of course, the cup body 1 can also be in the shape of a hollow hexagonal prism or a hollow octagonal prism, etc. In these shapes, the cup cover 2 can only be placed on the cup body 1 after being rotated by a specific angle due to the limitation, so the number of the limiting grooves 11 is limited, and the types of the optical paths to which the liquid-holding device for near-infrared analysis is applicable are also limited.

[0061] As a preferred specific embodiment, the cup body 1 is a hollow cylindrical cup body, the cover body 21 is a cylindrical cover body, and the limiting protrusion 22 is arranged on the outer circumferential surface of the cover body 21. At this time, the number of the limiting grooves 11 is not limited by the shapes of the cup body 1 and the cup cover 2, the cup cover 2 can be placed on the cup body 1 after being rotated by any angle, so the limiting grooves 11 can be evenly distributed in any number along the inner wall surface of the cup body 1, and in use, the limiting protrusion 22 can be aligned with the corresponding limiting groove 11 only by rotating the cover body 21.

[0062] In the above specific embodiment, the number of the limiting protrusions 22 is one, and the supporting effect of the limiting grooves 11 on the cup cover 2 is poor. At this time, the inner wall of the cup body 1 or the sealing ring 3 plays a righting role on the cup cover 2 to avoid the inclination of the cup cover 2 and the inclination of the mirror surface.

[0063] As a preferred specific embodiment, the number of the limiting protrusions 22 is at least two, and the limiting protrusions 22 are evenly distributed on the side surface of the cover body 21 to improve the supporting effect of the limiting grooves 11 on the cup cover 2.

[0064] The number of the limiting protrusions 22 is preferably two. At this time, the number of the limiting grooves 11 of the same depth can be set to be the least, and the types of the limiting grooves 11 of different depths can be set to be the most.

[0065] Of course, the number of limiting protrusions 22 can also be three, four or more, to further enhance the supporting effect of the limiting groove 11 on the cup cover 2.

[0066] It should be particularly pointed out that when detecting the data of the same liquid under different optical paths, the liquid with a height not less than the highest test optical path can be added to the communicating vessel first, and then the limiting protrusion 22 is matched with different limiting grooves 11. When the cover body is lowered, the excess liquid in the cup body 1 is pressed into the adjusting container 5, and when the cover body is raised, the liquid in the adjusting container 5 is supplemented into the cup body 1.

[0067] In the above specific embodiments, as in the prior art, since the height of the liquid level cannot be measured in real time, it is necessary to first measure the excess liquid with a measuring cup or the like, and then pour the excess liquid into the communicating vessel, which is more troublesome to operate.

[0068] In order to overcome the above problems, as a preferred specific embodiment, the adjusting container 5 is provided with an indicating mark for indicating the height of the liquid level, or the adjusting container 5 is provided with a monitoring device for monitoring the height of the liquid level.

[0069] As can be understood by those skilled in the art, the indicating mark can be an indicating scale 51, an indicating protrusion, a colored indicating line or the like, as long as the worker can judge whether the liquid level is above or below the indicating mark; the monitoring device can be a liquid level sensor, a liquid level meter or any device that can monitor the height of the liquid level, so that the worker can judge whether the height of the liquid level is greater than the corresponding optical path, which will not be described here.

[0070] Preferably, the adjusting container 5 is made of a light-transmitting material, and the indicating mark is arranged on the outer wall surface of the adjusting container 5, at this time, the adjusting container 5 is equivalent to a measuring cup or a test tube with a measuring range.

[0071] Of course, the adjusting container 5 can also be made of a non-light-transmitting material, and the indicating mark is arranged on the inner wall surface of the adjusting container 5, and the liquid level is observed through the opening of the adjusting container 5, at this time, the opening of the adjusting container 5 is large and the volume is large, which is not conducive to the miniaturization and liquid saving of the adjusting container 5.

[0072] When the height of the liquid level is monitored by the monitoring device, the adjusting container 5 can be light-transmitting or non-light-transmitting, and the monitoring device can be directly connected to a display screen for displaying the height of the liquid level or connected to a mobile phone or the like of the worker, so that the worker can observe the height of the liquid level.

[0073] When adding liquid, it is preferable to add liquid from the liquid inlet of the cup body 1, at this time, the liquid level in the adjusting container 5 rises steadily, which is convenient for observing or measuring the height of the liquid level.

[0074] When the liquid near-infrared analysis liquid containing device with the indicating mark or the monitoring device is used, the liquid can be directly injected into the communicating vessel, and an excessive amount of liquid needs not to be measured in advance, so that the steps can be simplified, the operation difficulty is reduced, and the detection efficiency is improved.

[0075] Finally, it should be noted that the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still be modified without paying creative labor to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of part of the technical features, or organic combination of different specific embodiments, so as to combine the specific embodiments given in the drawings, of course, those skilled in the art can also combine the specific embodiments not given in the remaining drawings of the specification. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid-holding device for liquid near-infrared analysis, characterized by comprising: The cup body and the adjusting container constitute a communicating vessel with both ends communicating with the atmosphere, the cup body is provided with a cup cover for pressing the liquid downward to make the excess liquid enter the adjusting container, the bottom of the cup body is provided with a light-transmitting sheet, and the bottom of the cup cover is provided with a mirror surface.

2. The liquid holding vessel for liquid near infrared analysis according to claim 1, wherein A sealing ring is arranged on the cup cover or the cup body to realize the sealing cooperation between the cup cover and the cup body.

3. The liquid-holding device for liquid near infrared analysis according to claim 1 or 2, wherein The cup cover comprises a cover body and a limiting protrusion arranged on the side surface of the cover body, the upper surface of the cup body is provided with a limiting groove matched with the limiting protrusion, and the groove bottom wall of the limiting groove is used for limiting cooperation with the limiting protrusion to limit the distance between the mirror surface and the light-transmitting sheet.

4. The liquid holding vessel for liquid near infrared analysis according to claim 3, wherein The number of the limiting grooves is at least two, and the depths of at least two limiting grooves are different, so that the distance between the mirror surface and the light-transmitting sheet is different when the limiting protrusion cooperates with the limiting grooves with different depths.

5. The liquid holding vessel for liquid near infrared analysis according to claim 4, wherein The cup body is a hollow cylindrical cup body, the cover body is a cylindrical cover body, and the limiting protrusion is arranged on the outer circumferential surface of the cover body.

6. The liquid holding vessel for liquid near infrared analysis according to claim 5, wherein The number of the limiting protrusions is at least two, and the limiting protrusions are uniformly arranged on the side surface of the cover body.

7. The liquid-holding device for liquid near infrared analysis according to claim 1 or 2, wherein The adjusting container is provided with an indicating mark for indicating the liquid level.

8. The liquid holding vessel for liquid near infrared analysis according to claim 7, wherein The adjusting container is made of a light-transmitting material, and the indicating mark is arranged on the outer wall surface of the adjusting container.

9. The liquid-holding device for liquid near infrared analysis according to claim 1 or 2, wherein The adjusting container is provided with a monitoring device for monitoring the liquid level.

10. The liquid-holding device for liquid near infrared analysis according to claim 1 or 2, wherein The volume of the adjusting container and the cup body satisfies that the height of unit volume of liquid in the cup body is less than that in the adjusting container.

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