Waveguide tube device of multichannel fluorescence detector

Abstract

The utility model belongs to the technical field of fluorescence quenching, and provides a multichannel fluorescence detector waveguide tube device, which comprises a waveguide tube, and the waveguide tube comprises a middle section and an edge section. The middle section and the edge sections are both of sleeve structures, the edge sections are coaxially arranged at the two ends of the middle section, the inner diameter of the middle section is smaller than that of the edge sections, the middle section and the edge sections are bonded and fixed, and the inner wall of the middle section and the inner walls of the edge sections are both used for being coated with fluorescent materials. According to the waveguide tube device of the multichannel fluorescence detector, the waveguide tube is divided into three sections, and each section can be independently coated. And because each section is small in length, the solvent is easier to volatilize, the curing time is short, and the production efficiency is high. Meanwhile, because the volatilization time is short, the influence of polymerization precipitation of the fluorescent material is limited, and the coating is more uniform. Secondly, the inner diameter of the middle section is smaller than that of the edge section, so that detection airflow can generate turbulent flow on the inner pipe wall, the contact probability of detection object molecules and the fluorescent material is increased, and the sensitivity is further improved. And common detection of dangerous goods such as explosives and drugs is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fluorescence quenching technology, and specifically relates to a multi-channel fluorescence detector waveguide device. BACKGROUND

[0002] In hazardous material detection, fluorescence quenching technology requires the use of specific fluorescent probes or fluorescent polymers. These materials emit fluorescence under normal conditions, but when they come into contact with hazardous molecules, the fluorescence is quenched. For example, certain fluorescent polymers have specific recognition ability for explosive molecules. When explosive molecules are adsorbed onto the surface of the polymer, the fluorescence is rapidly quenched, and then the presence of explosive molecules is determined by detecting the intensity of the fluorescent light using a photosensitive device. Fluorescence quenching technology has the following advantages:

[0003] High sensitivity: The change in fluorescence intensity can be accurately measured, and the presence of hazardous materials can be detected even at low concentrations;

[0004] Specificity: By designing specific fluorescent probes or polymers, high-selectivity detection of specific hazardous materials can be achieved;

[0005] Fast detection: The fluorescence quenching process usually occurs in a short time, making it suitable for rapid detection.

[0006] Waveguide tubes can convert chemical energy into light energy and are the core of detection instruments. However, due to the specificity of high-molecular-weight fluorescent materials, only one type of fluorescent material can react with a certain type of hazardous material. To achieve broad-spectrum detection, different fluorescent materials must be coated in segments on the inner wall of the waveguide tube.

[0007] The existing waveguide tube coating process consists of three steps:

[0008] 1. Cleaning: Use methanol or ethanol to clean the quartz tube, and let it dry until the cleaning reagent is completely volatilized.

[0009] 2. Coating: Inject high-molecular-weight fluorescent reagent material into the marked position of the waveguide tube.

[0010] 3. Curing: Place the coated waveguide tube in a light-proof and ventilated environment and wait for the solution in the fluorescent reagent to volatilize and solidify.

[0011] During the coating process, the following problems exist: Due to the diffusion of fluorescent reagents, different fluorescent materials can easily infect each other; the inner diameter of the waveguide tube is too thin and too long, making it difficult to volatilize and solidify after coating (for example, when coating a three-segment tube, the fluorescent material in the middle segment needs to be coated first, and then the materials in the front and rear segments need to be coated after waiting for the volatilization and solidification of the middle segment), resulting in low waveguide tube yield, long preparation time, and low preparation efficiency, especially when the number of channels is greater than three, the problem is more pronounced. Moreover, the long solidification time can cause the fluorescent material to aggregate and settle at the bottom, resulting in uneven coating and affecting the detection sensitivity of the instrument. Utility model content

[0012] In view of the problems existing in the prior art, the utility model provides a multi-channel fluorescence detector waveguide device which can solve the above problems.

[0013] In order to achieve the above object, the utility model adopts the following technical scheme: a multi-channel fluorescence detector waveguide device, comprising a waveguide pipe, the waveguide pipe comprises an intermediate section and an edge section;

[0014] The intermediate section and the edge section are sleeve structures, the intermediate section is coaxially provided with the edge section at both ends, the inner diameter of the intermediate section is smaller than that of the edge section, the intermediate section and the edge section are adhesively fixed, and the inner walls of the intermediate section and the edge section are used for coating fluorescent material.

[0015] Preferably, the intermediate section and the edge section have the same outer diameter.

[0016] Preferably, the intermediate section and the edge section are adhesively fixed through resin glue.

[0017] Preferably, the intermediate section is provided with guide rods at both ends, and the edge section is provided with guide holes matched with the guide rods.

[0018] Preferably, two guide rods are arranged at each end of the intermediate section.

[0019] Preferably, the utility model further comprises a main cavity, and the waveguide pipe is arranged inside the main cavity.

[0020] Preferably, the utility model further comprises an air nozzle and a guide head, and the waveguide pipe is in communication with the air nozzle and the guide head at both ends respectively.

[0021] Preferably, the utility model further comprises a cover plate, a detection hole is arranged on the side wall of the main cavity, and the cover plate is arranged on the detection hole.

[0022] Compared with the prior art, the utility model has the beneficial effects that:

[0023] The utility model provides a kind of multi-channel fluorescence detector waveguide pipe device, waveguide pipe is divided into three sections, each section can be individually coated.Waveguide pipe coating can be divided into four steps in this way: first step cleaning, second step coating, third step solidification, fourth step adhesion.Due to the length of each section is smaller, solvent is more volatile, so that second step and third step are more easily realized, solidification time is short, production efficiency is high.Taking waveguide pipe 0.5mm inner diameter as an example, solidification time can be shortened to 10% of original time.Simultaneously due to volatile time is fast, the influence of fluorescence material polymerization deposition is limited, coating is more uniform, sensitivity improves 50%, yield improves 60%.Secondly, middle section inner diameter is less than edge section inner diameter, can let detection air current generate turbulence in inner tube wall, increase the contact probability of detection molecule and fluorescence material, and then increase sensitivity.Explosives, drugs and other different kinds of dangerous goods are detected together. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a kind of multi-channel fluorescence detector waveguide pipe device's waveguide pipe's perspective structure schematic diagram provided by the utility model embodiment;

[0025] Fig. 2 It is a kind of multi-channel fluorescence detector waveguide pipe device's waveguide pipe's cross section structure schematic diagram one provided by the utility model embodiment;

[0026] Fig. 3 It is a kind of multi-channel fluorescence detector waveguide pipe device's waveguide pipe's explosion structure schematic diagram provided by the utility model embodiment;

[0027] Fig. 4 It is a kind of multi-channel fluorescence detector waveguide pipe device's waveguide pipe's cross section structure schematic diagram two provided by the utility model embodiment;

[0028] Fig. 5 It is a kind of multi-channel fluorescence detector waveguide pipe device's explosion structure schematic diagram provided by the utility model embodiment;

[0029] Fig. 6 It is a kind of multi-channel fluorescence detector waveguide pipe device's internal structure schematic diagram provided by the utility model embodiment.

[0030] In the drawings, the component list represented by each sign is as follows:

[0031] 1, waveguide pipe;

[0032] 2, middle section;

[0033] 3, edge section;

[0034] 4, guide rod;

[0035] 5, guide hole;

[0036] 6, main cavity;

[0037] 7, air nozzle;

[0038] 8, guide head;

[0039] 9, cover plate;

[0040] 10, detection hole. DETAILED DESCRIPTION

[0041] In order to make the technical solutions and advantages in the embodiments of the present application more clear and apparent, the exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] The present embodiment provides a kind of multi-channel fluorescence detector waveguide device, including waveguide 1, waveguide 1 includes middle section 2, edge section 3.

[0043] Wherein, middle section 2, edge section 3 are sleeve structure, middle section 2 both ends are coaxially provided with edge section 3, the inner diameter of middle section 2 is less than the inner diameter of edge section 3, middle section 2 and edge section 3 are adhesively fixed, middle section 2 inner wall, edge section 3 inner wall are used for coating fluorescent material.

[0044] For example, see Figs. 1-2 Two edge sections 3 are located at left and right sides of middle section 2 respectively, and middle section 2 and edge section 3 are coaxially arranged, and the outer diameters of middle section 2 and edge section 3 are the same.The left end surface of left edge section 3 is adhesively fixed with the left end surface of middle section 2, and the right end surface of middle section 2 is adhesively fixed with the left end surface of right edge section 3. Since middle section 2 and edge section 3 are sleeve structures with both ends open, left edge section 3, middle section 2 and right edge section 3 are sequentially communicated. Since the inner diameter of middle section 2 is smaller than the inner diameter of edge section 3, a structure with thin middle and thick edges can be formed, so that the flow rate of the detection gas flow increases and the pressure decreases when flowing through middle section 2, generating turbulence on the inner pipe wall. The inner wall of middle section 2 and the inner wall of edge section 3 are coated with fluorescent material. Further, the contact probability of dangerous product molecules in the detection gas flow with the fluorescent material can be increased.

[0045] Wherein, middle section 2 inner wall, edge section 3 inner wall can each be coated with different materials to avoid mutual infection between different fluorescent materials. A variety of compounds can be coated, the utilization rate of the pipe is high, and the compound coating position can be more accurately controlled. Without changing the inner diameter in the same section, the feasibility is high.

[0046] Based on the above structure, the waveguide device of the multi-channel fluorescence detector provided in the embodiment divides the waveguide 1 into three sections, each of which can be coated separately. In this way, the coating of the waveguide 1 can be divided into four steps: the first step is cleaning, the second step is coating, the third step is curing, and the fourth step is bonding. Since the length of each section is small, the solvent is more easily volatilized, the second and third steps are more easily achieved, the curing time is short, and the production efficiency is high. Taking the waveguide with an inner diameter of 0.5 mm as an example, the curing time is shortened to 10% of the original time. At the same time, due to the fast volatilization time, the influence of the polymerization and precipitation of the fluorescent material is limited, the coating is more uniform, the sensitivity is improved by 50%, and the yield is improved by 60%. Secondly, the inner diameter of the middle section 2 is smaller than that of the edge section 3, which can generate turbulence on the inner wall of the tube, increase the contact probability of the detection gas flow and the fluorescent material, and further increase the sensitivity. The common detection of different types of dangerous goods such as explosives and drugs and the multi-section coating of multiple compounds are achieved.

[0047] On the basis of the above technical solution, in the technical solution provided in the embodiment, the middle section 2 and the edge section 3 are fixed by resin adhesive.

[0048] That is, the right end face of the left edge section 3 and the left end face of the middle section 2 are fixed by resin adhesive, and the right end face of the middle section 2 and the left end face of the right edge section 3 are fixed by resin adhesive.

[0049] In order to avoid misalignment of the middle section 2 and the edge section 3 during bonding, in the technical solution provided in the embodiment, two guide rods 4 are arranged at the two ends of the middle section 2, and the edge section 3 is provided with guide holes 5 matched with the guide rods 4.

[0050] For example, referring to Figs. 3-4 , two guide rods 4 are arranged at the left and right ends of the middle section 2, and the guide rods 4 are parallel to the middle section 2. Two guide holes 5 are formed in the right end face of the left edge section 3, and two guide holes 5 are formed in the left end face of the right edge section 3.

[0051] During bonding, resin adhesive can be coated on the left and right end faces of the middle section 2, and the guide rods 4 do not need to be coated with resin adhesive. Then, the guide rods 4 at the left end of the middle section 2 are inserted into the guide holes 5 of the left edge section 3, and the guide rods 4 at the right end of the middle section 2 are inserted into the guide holes 5 of the right edge section 3. The guide rods 4 can play a limiting role to avoid misalignment of the middle section 2 and the edge section 3, and effectively improve the production efficiency.

[0052] In the technical solution provided in the embodiment, a main cavity 6 is further included, and the waveguide 1 is arranged inside the main cavity 6.

[0053] Further including a gas nozzle 7 and a guide head 8, the two ends of the waveguide 1 are respectively communicated with the gas nozzle 7 and the guide head 8.

[0054] Further including a cover plate 9, a detection hole 10 is formed in the side wall of the main cavity 6, and the cover plate 9 is arranged on the detection hole 10.

[0055] For example, see Figs. 5-6 The main cavity 6 is internally provided with a left-right through accommodating hole, and the waveguide tube 1 is arranged in the accommodating hole. The air nozzle 7 is in communication with the left end of the waveguide tube 1, and the left end of the main cavity 6 is provided with a left accommodating groove matched with the air nozzle 7, and the right end of the air nozzle 7 is partially embedded in the left accommodating groove, thereby effectively improving the stability of the air nozzle 7. The guide head 8 is in communication with the right end of the waveguide tube 1, and the right end of the main cavity 6 is provided with a right accommodating groove matched with the guide head 8, and the left end of the guide head 8 is partially embedded in the right accommodating groove, thereby effectively improving the stability of the guide head 8.

[0056] The waveguide tube 1 is connected with the external detection airflow pipe through the air nozzle 7 and the guide head 8. The detection hole 10 is convenient for the photosensitive device to detect the intensity of the fluorescent light in the waveguide tube 1. When detection is not needed, the cover plate 9 can shield the detection hole 10.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0058] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0060] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A multi-channel fluorescence detector waveguide device, characterized in that, Including waveguide (1), the waveguide (1) includes middle section (2), edge section (3); The middle section (2), the edge section (3) are sleeve structure, the middle section (2) both ends are coaxially provided with the edge section (3), the middle section (2) inner diameter is less than the edge section (3) inner diameter, the middle section (2) and the edge section (3) are bonded and fixed, the middle section (2) inner wall, the edge section (3) inner wall are used for coating fluorescent material.

2. A multi-channel fluorescence detector waveguide apparatus according to claim 1, wherein, The middle section (2) and the edge section (3) have the same outer diameter.

3. A multi-channel fluorescence detector waveguide apparatus as defined in claim 1, wherein, The middle section (2) and the edge section (3) are bonded and fixed by resin glue.

4. A multi-channel fluorescence detector waveguide apparatus as defined in claim 1, wherein, The middle section (2) both ends are provided with guide rod (4), the edge section (3) is provided with the guide hole (5) compatible with the guide rod (4).

5. A multi-channel fluorescence detector waveguide apparatus as defined in claim 4, wherein, The middle section (2) both ends are provided with two guide rods (4).

6. A multi-channel fluorescence detector waveguide apparatus as defined in claim 1, wherein, Further comprising main cavity (6), the waveguide (1) is arranged inside the main cavity (6).

7. A multi-channel fluorescence detector waveguide apparatus as defined in claim 1, wherein, Further comprising air nozzle (7), guide head (8), the waveguide (1) both ends are communicated with the air nozzle (7), the guide head (8) respectively.

8. A multi-channel fluorescence detector waveguide apparatus as defined in claim 6, wherein, Further comprising cover plate (9), the main cavity (6) side wall is provided with detection hole (10), the cover plate (9) is covered on the detection hole (10).

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