CN204964537U - Autoinjection device based on optical integrator ball - Google Patents

Abstract

The utility model provides an automatic sampling device based on an optical integrating sphere, which is mainly composed of a sampling and measuring unit, an integrating sphere, a glass tube and a liquid level controller. Through the liquid level controller, the automatic sampling action of the sampling and metering unit can be controlled in time, so as to ensure that the sampling and metering unit will not bubble into the chamber of the integrating sphere, and ensure that there is no bubble retention inside the integrating sphere, thereby improving the quality of the integrating sphere. Measurement stability.

Description

An automatic sampling device based on an optical integrating sphere

technical field

The utility model relates to an automatic sampling device based on an optical integrating sphere, which is suitable for an automatic measuring instrument using an optical integrating sphere.

Background technique

The traditional automatic sampling system judges the end point of the injection by time, that is, stops the injection after reaching the specified time. In order to ensure the normal operation of the instrument, generally the specified time is much longer than the time required for normal sample injection. So when the sample is fed, the system is still bubbling into the sample chamber. Limited by the design of the integrating sphere, the injection port and the air vent cannot be too large, so the traditional sampling method cannot eliminate the trapped air bubbles in the integrating sphere, thus affecting the stability of the measurement.

Utility model content

The purpose of this utility model is to provide an innovative technical idea and scheme for the automatic measuring instrument based on the integrating sphere, that is, add a liquid level control unit on the upper part of the vent port of the integrating sphere, when the sample is injected into the indicating liquid of the liquid level control unit Stop the sampling action immediately after the position, so as to prevent the automatic sampling unit from bubbling into the inner chamber of the integrating sphere.

Technical scheme of the utility model:

An automatic sampling device based on an optical integrating sphere, mainly composed of a sampling and metering unit 1, an integrating sphere 2, a glass tube 3, and a liquid level controller 4:

Wherein, the integrating sphere 2 is composed of a light-transmitting substrate 21, a diffuse reflection layer 22, an entrance hole 23, an exit hole 24, a sample inlet 25, and a vent 26; the light-transmitting substrate 21 forms a spherical chamber of the integrating sphere 2, and is located 2; the diffuse reflection layer 22 is coated on the outside of the light-transmitting substrate 21, and is positioned at the outside of the integrating sphere 2; At the bottom, the air vent is located on the top of the integrating sphere 2;

The sampling and metering unit 1 is connected to the inlet 25 of the integrating sphere 2 through an adapter; the bottom end of the glass tube 3 is connected to the vent 26 of the integrating sphere 2 through an adapter, and the top is The connector is connected to the atmosphere; the liquid level controller 4 is placed on the glass tube 3;

The sampling and metering unit 1 is responsible for the metering and automatic sampling of water samples and reagents, the metering and circulation of samples, the cleaning of the chamber of the integrating sphere 2 and the discharge of waste liquid;

The light incident into the chamber of the integrating sphere 2 through the entrance hole 23 reacts with the sample in the chamber after multiple reflections by the diffuse reflection layer 22 to generate a characteristic spectrum; the generated characteristic spectrum is reflected by the diffuse reflection layer 22 multiple times Afterwards, they are superimposed at the exit hole 24 and received by the detector;

The glass tube 3 is responsible for buffering the sample overflowing from the inner chamber of the integrating sphere 2;

The liquid level controller 4 is responsible for indicating the sampling status of the inner chamber of the integrating sphere 2; when the sample liquid level in the glass tube 3 reaches the liquid level indicated by the liquid level controller 4, the sampling and metering unit 1 stops the sampling action , to ensure that there is no bubble trapped in the inner chamber of the integrating sphere 2.

Further, the automatic sampling device based on the optical integrating sphere does not include a liquid level controller, that is, the above-mentioned liquid level controller 4 can be removed. At this time, the sample injection and metering unit 1 is used to measure the amount of the sample to be specified. After the sample is injected into the integrating sphere 2, stop the sample injection to ensure that there is no air bubbles in the inner chamber of the integrating sphere 2.

Further, the above-mentioned glass tube 3 can be replaced by a Teflon tube, and the automatic sampling device based on the optical integrating sphere does not include a liquid level controller, that is, the liquid level controller 4 is removed, and at this time, the sampling and metering unit is used to 1 metering function, stop the sample injection after the specified dose of sample is injected into the integrating sphere 2, so as to ensure that there is no air bubble in the inner chamber of the integrating sphere 2.

Further, the above-mentioned sampling and metering unit 1 adopts a configuration based on "peristaltic pump + metering tube + liquid level sensor + multi-way valve group", or based on "syringe pump+multi-way valve group". Wherein, the combination of the "peristaltic pump + metering tube + liquid level sensor + multi-way valve group" and the combination of the "syringe pump + multi-way valve group" are not limited, and meet the requirements of conventional combination methods in this field That's it.

Effect of the present utility model:

It solves the problem of bubble retention caused by the traditional automatic sampling device injecting samples into the inner chamber of the integrating sphere, and effectively improves the stability of the measurement based on the integrating sphere.

Description of drawings

Fig. 1 is the basic composition block diagram of the automatic sampling device based on optical integrating sphere in the utility model first kind of preferred embodiment;

Fig. 2 is a schematic diagram of the basic composition of the integrating sphere in the first preferred embodiment of the utility model;

Figure 3 is a schematic diagram of the basic composition of the sampling and metering unit based on the combination of "peristaltic pump + metering tube + liquid level sensor + multi-way valve group".

Explanation of reference numbers:

1—sampling and metering unit; 2—integrating sphere; 21—light-transmitting substrate; 22—diffuse reflection layer; 23—incidence hole; 24—exit hole; 25—injection port; 26—ventilation port; 3—glass tube ; 4—liquid level controller.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Embodiment one

As shown in Figure 1 and Figure 2, an automatic sampling device based on an optical integrating sphere is mainly composed of a sampling and metering unit 1, an integrating sphere 2, a glass tube 3, and a liquid level controller 4:

Wherein, the integrating sphere 2 is composed of a light-transmitting substrate 21, a diffuse reflection layer 22, an entrance hole 23, an exit hole 24, a sample inlet 25, and a vent 26; the light-transmitting substrate 21 forms a spherical chamber of the integrating sphere 2, and is located 2; the diffuse reflection layer 22 is coated on the outside of the light-transmitting substrate 21, and is positioned at the outside of the integrating sphere 2; At the bottom, the air vent is located on the top of the integrating sphere 2;

The sampling and metering unit 1 is connected to the inlet 25 of the integrating sphere 2 through an adapter; the bottom end of the glass tube 3 is connected to the vent 26 of the integrating sphere 2 through an adapter, and the top is The connector is connected to the atmosphere; the liquid level controller 4 is placed on the glass tube 3;

The sampling and metering unit 1 is responsible for the metering and automatic sampling of water samples and reagents, the metering and circulation of samples, the cleaning of the chamber of the integrating sphere 2 and the discharge of waste liquid;

The light incident into the chamber of the integrating sphere 2 through the entrance hole 23, after multiple reflections by the diffuse reflection layer 22, reacts with the sample in the chamber to generate a characteristic spectrum; After reflection, superimpose at the exit hole 24 and be received by the detector;

The glass tube 3 is responsible for buffering the sample overflowing from the inner chamber of the integrating sphere 2;

The liquid level controller 4 is responsible for indicating the sampling status of the inner chamber of the integrating sphere 2; when the sample liquid level in the glass tube 3 reaches the liquid level indicated by the liquid level controller 4, the sampling and metering unit 1 stops the sampling action , to ensure that there is no bubble trapped in the inner chamber of the integrating sphere 2.

Embodiment two

This embodiment is basically the same as Embodiment 1, except that the sampling and metering unit 1 is specifically composed of "peristaltic pump + metering tube + liquid level sensor + multi-way valve group", as shown in FIG. 3 .

The above shows and describes the basic structure and basic principles of the utility model, and those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. What described in above-mentioned embodiment and description is only the basic structure and basic principle of the present utility model, under the premise of not departing from the spirit and scope of the present utility model, the present utility model also can have various changes and improvements, and these changes and improvements all fall into the Into the scope of protection required by the utility model.

Claims (4)

1. based on an automatic sampling apparatus for optical integrating-sphere, it is characterized in that: described device is made up of sample introduction and metering units (1), integrating sphere (2), glass tube (3), fluid level controller (4);

Wherein, integrating sphere (2) is made up of light-transparent substrate (21), diffuse reflector (22), entrance aperture (23), perforation hole (24), injection port (25), blow vent (26); Light-transparent substrate (21) forms the spherical chamber of integrating sphere (2), is positioned at the inner side of integrating sphere (2); Diffuse reflector (22) is coated in the outside of light-transparent substrate (21), is positioned at the outside of integrating sphere (2); The path direction that injection port (25) and blow vent (26) are formed is perpendicular to surface level, and injection port is positioned at the bottom of integrating sphere (2), and blow vent is positioned at the top of integrating sphere (2);

Sample introduction and metering units (1) carry out pipeline by adaptor with the injection port (25) of integrating sphere (2) and are connected; The bottom of glass tube (3) is carried out pipeline by adaptor with the blow vent (26) of integrating sphere (2) and is connected, and top is connected to air by adaptor; Fluid level controller (4) is placed on glass tube (3).

2. the automatic sampling apparatus based on optical integrating-sphere according to claim 1, is characterized in that: do not comprise described fluid level controller (4).

3. the automatic sampling apparatus based on optical integrating-sphere according to claim 1, is characterized in that: described glass tube (3) adopts teflon pipe to replace, and does not comprise described fluid level controller (4).

4. according to the arbitrary described automatic sampling apparatus based on optical integrating-sphere of claim 1-3, it is characterized in that: described sample introduction and metering units (1) adopt based on " peristaltic pump+gauge line+liquid level sensor+multiport valve group " or the constituted mode based on " syringe pump+multiport valve group ".