Optical fiber probe for collecting fluorescence in liquid environment

Abstract

The utility model relates to an optical fiber probe for collecting fluorescence in a liquid environment. The optical fiber probe comprises an optical fiber joint, a metal armored tube, a sealing flange, an optical fiber probe and an optical fiber, the optical fiber connector, the metal armored tube, the sealing flange and the optical fiber probe are provided with inner holes penetrating through the head and tail ends of the optical fiber connector, the metal armored tube and the sealing flange. The optical fiber connector is in nested connection with one end of the metal armored tube, and structural adhesive is used for filling and bonding at a seam; the other end of the metal armor tube is connected with one end of the sealing flange in a nesting manner, and the seam is filled with structural adhesive for bonding; one end of the optical fiber probe is connected with the other end of the sealing flange in a nesting manner, and a seam is filled and bonded with a structural adhesive; the optical fiber is in contact with the outside through the optical fiber joint, the metal armored tube, the sealing flange and an inner hole of the optical fiber probe; filling gaps among the optical fiber, the inner hole of the optical fiber connector and the inner hole of the optical fiber probe with a structural adhesive for bonding; and the optical fiber and the sealing flange are bonded by filling a gap between the optical fiber and the inner hole of the sealing flange in a sealing manner through a structural adhesive.

Description

Technical Field

[0001] The utility model relates to an optical fiber probe used for collecting fluorescence in a liquid environment, belonging to the field of fluorescence detection. Background Art

[0002] Certain objects can be excited to produce fluorescence under special circumstances. Special optical fibers can be used to collect the fluorescence produced by the objects and perform quantitative fluorescence analysis after connecting to the detection equipment. If the object to be measured is the liquid itself, or an object placed in the liquid, the optical fiber needs to be inserted into the liquid for collection.

[0003] In general, the fluorescence signal is relatively weak, so the coupling efficiency of the overall optical system must be taken into consideration. At the same time, when liquid is the object or medium, the sealing of the system and the corrosion resistance of the material must also be considered.

[0004] In the prior art, the optical path system is divided into two parts: one is the bare optical fiber probe, which is placed in the liquid to collect fluorescence; the other is the optical fiber jumper, which transmits the signal to the detection equipment after coupling the optical fiber probe;

[0005] However, in the prior art, the probe and the jumper need to be coupled. When the fluorescence signal is weak, the coupling loss has a great impact on the detection accuracy of the equipment. The coupling position of the probe and the jumper cannot be sealed. When the liquid is a volatile liquid such as liquid nitrogen, this method cannot meet the requirements. In order to meet the corrosion resistance, the coating of the bare optical fiber probe placed in the liquid must be removed, and the optical fiber without coating protection is easily broken. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model proposes an optical fiber probe for collecting fluorescence in a liquid environment.

[0007] The technical solution of the utility model is as follows:

[0008] An optical fiber probe for collecting fluorescence in a liquid environment, comprising an optical fiber connector, a metal armor tube, a sealing flange, an optical fiber probe and an optical fiber;

[0009] The optical fiber connector, metal armor tube, sealing flange, and optical fiber probe are all provided with inner holes penetrating both ends thereof;

[0010] The optical fiber connector is nested and connected with one end of the metal armor tube, and the joint is filled and bonded with structural adhesive;

[0011] The other end of the metal armor tube is nested and connected with one end of the sealing flange, and the joint is filled and bonded with structural adhesive;

[0012] One end of the optical fiber probe is nested and connected with the other end of the sealing flange, and structural adhesive is used to fill and bond the joint;

[0013] The optical fiber is in contact with the outside world through the optical fiber connector, the metal armor tube, the sealing flange and the inner hole of the optical fiber probe;

[0014] Filling the gap between the optical fiber and the inner hole of the optical fiber connector with structural adhesive to bond the optical fiber and the optical fiber connector;

[0015] Filling the gap between the optical fiber and the inner hole of the sealing flange with structural adhesive to bond the optical fiber and the sealing flange;

[0016] The optical fiber and the optical fiber probe are bonded together by filling the gap between the optical fiber and the inner hole of the optical fiber probe with structural adhesive.

[0017] As a preferred implementation of this embodiment, the structural adhesive used for sealing and filling is a structural adhesive that has been exhausted by a centrifuge.

[0018] As a preferred implementation of this embodiment, the sealing flange is provided with a plurality of screw holes penetrating the flange, and a sealing ring groove is provided on the flange surface at one side of the connection between the sealing flange and the optical fiber probe.

[0019] As a preferred implementation of this embodiment, the optical fiber probe is made of ceramic material.

[0020] As a preferred implementation of this embodiment, a polyimide coating layer is provided on the surface of the optical fiber.

[0021] The utility model has the following beneficial effects:

[0022] 1. The utility model adopts a whole optical fiber to avoid coupling loss between the optical fiber probe and the optical fiber jumper, and improves the coupling efficiency of the overall optical path system.

[0023] 2. The utility model uses the structural adhesive exhausted by the centrifuge to seal the gap between the optical fiber and the inner hole of the sealing flange, and the leakage rate can reach 10 -9 Up to 10 -10 , excellent sealing performance.

[0024] 3. The utility model adopts polyimide-coated optical fiber, and the gas content of the coating material is extremely low, which effectively ensures the sealing performance inside the sealing flange.

[0025] 4. The outer shell of the optical fiber probe of the utility model is made of ceramic material, which has good physical and chemical stability and good corrosion resistance, and can be applied to most liquid environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is a partial structural cross-sectional view of the utility model;

[0028] Figure 3 This is a schematic diagram of the flange structure of the utility model.

[0029] 1. Fiber optic connector; 2. Metal armor tube; 3. Sealing flange; 31. Screw hole; 32. Sealing ring groove; 4. Fiber optic probe; 5. Structural adhesive; 6. Optical fiber. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be understood that the step numbers used in this document are only for convenience of description and are not intended to limit the order in which the steps are executed.

[0032] It should be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0033] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0034] The term "and / or" means and includes any and all possible combinations of one or more of the associated listed items.

[0035] Embodiment 1:

[0036] See also Figure 1 , an optical fiber probe for collecting fluorescence in a liquid environment, comprising an optical fiber connector 1, a metal armor tube 2, a sealing flange 3, an optical fiber probe 4 and an optical fiber 6;

[0037] The optical fiber connector 1 is a SMA905 standard connector, which is connected to the detection device and transmits the fluorescence signal to the device;

[0038] The metal armor tube 2 is made of stainless steel 304, which has the characteristics of tensile and compressive resistance and protects the optical fiber;

[0039] The optical fiber connector 1, metal armor tube 2, sealing flange 3, and optical fiber probe 4 are all provided with inner holes penetrating both ends thereof;

[0040] The optical fiber connector 1 is nested and connected with one end of the metal armor tube 2, and a structural adhesive 5 is used to fill and bond the joint;

[0041] The other end of the metal armor tube 2 is nested and connected with one end of the sealing flange 3, and the joint is filled and bonded with a structural adhesive 5;

[0042] One end of the optical fiber probe 4 is nested and connected with the other end of the sealing flange 3, and the joint is filled and bonded with a structural adhesive 5;

[0043] The optical fiber 6 is in contact with the outside world through the optical fiber connector 1, the metal armor tube 2, the sealing flange 3 and the inner hole of the optical fiber probe 4;

[0044] The optical fiber 6 and the optical fiber connector 1 are bonded by filling the gap between the optical fiber 6 and the inner hole of the optical fiber connector 1 with the structural adhesive 5;

[0045] The optical fiber 6 and the sealing flange 3 are bonded by filling the gap between the optical fiber 6 and the inner hole of the sealing flange 3 with the structural adhesive 5;

[0046] The optical fiber 6 and the optical fiber probe 4 are bonded together by filling the gap between the optical fiber 6 and the inner hole of the optical fiber probe 4 with the structural adhesive 5 .

[0047] As a preferred implementation of this embodiment, the structural adhesive 5 used for sealing and filling is a structural adhesive that has been exhausted by a centrifuge.

[0048] As a preferred implementation of this embodiment, the sealing flange 3 is made of stainless steel 304 and is fixed to the liquid cavity housing by screws;

[0049] The sealing flange 3 is provided with a plurality of screw holes 31 penetrating the flange, and an O-ring groove 32 is provided on the flange surface at one side of the connection between the sealing flange 3 and the optical fiber probe 4 .

[0050] As a preferred implementation of this embodiment, the optical fiber probe 4 is made of ceramic material, which has good physical and chemical stability and good corrosion resistance, and can be applied to most liquids to protect the optical fiber placed in the liquid.

[0051] As a preferred implementation of this embodiment, the surface of the optical fiber 6 is provided with a polyimide coating layer, and there is a whole optical fiber from the connector end to the probe end, which collects and transmits fluorescence, avoids coupling loss between optical fibers, and improves the coupling efficiency of the overall optical path system.

[0052] The utility model adopts an integral design, which is easy to assemble, and the length of the optical fiber outside the liquid cavity can be increased or decreased according to use requirements.

[0053] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An optical fiber probe for collecting fluorescence in a liquid environment, characterized in that: It comprises an optical fiber connector (1), a metal armor tube (2), a sealing flange (3), an optical fiber probe (4) and an optical fiber (6); The optical fiber connector (1), metal armor tube (2), sealing flange (3), and optical fiber probe (4) are all provided with inner holes penetrating both ends thereof; The optical fiber connector (1) is nested and connected to one end of the metal armor tube (2), and a structural adhesive (5) is used to fill and bond the joint; The other end of the metal armor tube (2) is nested and connected with one end of the sealing flange (3), and the joint is filled and bonded with structural adhesive (5); One end of the optical fiber probe (4) is nested and connected with the other end of the sealing flange (3), and a structural adhesive (5) is used to fill and bond the joint; The optical fiber (6) contacts with the outside world through the optical fiber connector (1), the metal armor tube (2), the sealing flange (3) and the inner hole of the optical fiber probe (4); The optical fiber (6) and the optical fiber connector (1) are bonded together by filling the gap between the optical fiber (6) and the inner hole of the optical fiber connector (1) with a structural adhesive (5); The optical fiber (6) and the sealing flange (3) are bonded together by sealing and filling the gap between the optical fiber (6) and the inner hole of the sealing flange (3) with a structural adhesive (5); The optical fiber (6) and the optical fiber probe (4) are bonded together by filling the space between the optical fiber (6) and the inner hole of the optical fiber probe (4) with structural adhesive (5).

2. The optical fiber probe for collecting fluorescence in a liquid environment according to claim 1, characterized in that: The structural adhesive (5) used for sealing and filling is a structural adhesive exhausted by a centrifuge.

3. The optical fiber probe for collecting fluorescence in a liquid environment according to claim 1, characterized in that: The sealing flange (3) is provided with a plurality of screw holes (31) penetrating the flange, and a sealing ring groove (32) is provided on the flange surface at one side of the connection between the sealing flange (3) and the optical fiber probe (4).

4. The optical fiber probe for collecting fluorescence in a liquid environment according to claim 1, characterized in that: The optical fiber probe (4) is made of ceramic material.

5. The optical fiber probe for collecting fluorescence in a liquid environment according to claim 1, characterized in that: The surface of the optical fiber (6) is provided with a polyimide coating layer.

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