WO2022021766A1

WO2022021766A1 - Optical probe

Info

Publication number: WO2022021766A1
Application number: PCT/CN2020/138472
Authority: WO
Inventors: 刘耀光; 郑钢; 于浩
Original assignee: 苏州优谱德精密仪器科技有限公司
Priority date: 2020-07-28
Filing date: 2020-12-23
Publication date: 2022-02-03
Also published as: CN213813363U

Abstract

An optical probe, comprising a probe rod (2). A window cavity (21) and an accommodating cavity (22) used for accommodating an optical assembly are formed in the probe rod (2). The window cavity (21) is located at the end of the accommodating cavity (22). The accommodating cavity (22) is communicated with the window cavity (21). A first annular gasket (3) and a second annular gasket (4) are provided in the window cavity (21). An optical window sheet (5) is provided between the first annular gasket (3) and the second annular gasket (4). The first annular gasket (3) and the second annular gasket (4) are abutted against the optical window sheet (5) to realize compression sealing. The first annular gasket (3) and the second annular gasket (4) adopt gold gaskets. The hardness of the optical window sheet (5) is greater than that of the gold gasket. A protective cylinder (1) is also connected at the end of the probe rod (2). The window cavity (21) is located inside the protective cylinder (1). A through hole (11) is formed at the top of the protective cylinder (1). The through hole (11) is communicated with the window cavity (21). The optical probe can be applied to an extreme environment such as a high temperature environment, a low temperature environment, a high pressure environment, and a strong corrosion environment for normal data acquisition.

Description

an optical probe

technical field

The utility model relates to the technical field of optical detection, in particular to an optical probe.

Background technique

As a non-contact detection technology, optical sensor detection technology can perform non-destructive measurement, and has the advantages of being less susceptible to interference, high-speed transmission, and telemetry and remote control. Wide range of applications. The optical probe is an important part of the optical sensor, which can guide the detection light to the object under test and collect the light signal containing the information of the object under test. The optical probe can realize the functions of illumination, imaging, microscopic imaging, spectrum acquisition, etc. Existing optical probes can only be used in conventional environments and cannot be used in special environments, such as in a reaction kettle at a high temperature of hundreds of degrees Celsius and a high pressure of tens of megapascals, and in a special climate environment of minus 20 to 30 degrees Celsius. In the reaction kettle with strong corrosive medium such as strong acid and strong alkali, the existing optical probe cannot be used normally and cannot meet the needs of use.

Utility model content

The technical problem to be solved by the utility model is to provide an optical probe which can be used normally in extreme environments such as high temperature, low temperature, high pressure and strong corrosion.

In order to solve the above-mentioned technical problems, the technical solutions provided by the present utility model are as follows:

An optical probe, comprising a probe rod, a window cavity and an accommodation cavity for accommodating an optical component are arranged inside the probe rod, the accommodation cavity is communicated with the window cavity, and the window cavity is provided with a second cavity. An annular spacer and a second annular spacer, an optical window is arranged between the first annular spacer and the second annular spacer, and the first annular spacer and the second annular spacer are abutted against the On the optical window sheet, the first annular spacer and the second annular spacer both use gold spacers, the hardness of the optical window sheet is greater than the hardness of the gold spacer, and the end of the probe is also connected with a A protective tube, the window cavity is located inside the protective tube, a through hole is provided on the top of the protective tube, and the through hole is communicated with the window cavity.

In one of the embodiments, the probe and the protective sleeve are detachably connected.

In one embodiment, the outer wall of the probe rod is provided with an outer thread, the inner wall of the protective sleeve is provided with an inner thread, and the outer thread and the inner thread are screwed together.

In one embodiment, the optical window is a quartz window, a sapphire window or an infrared window.

In one embodiment, the infrared windows comprise zinc selenide windows, calcium fluoride windows or barium fluoride windows.

In one of the embodiments, the probe is made of stainless steel or Hastelloy.

In one of the embodiments, the outer wall of the probe rod is coated with a corrosion-resistant layer.

In one embodiment, the corrosion-resistant layer is a polytetrafluoroethylene layer.

In one embodiment, the optical assembly includes one or more of optical fibers, lenses, and filters.

The utility model has the following beneficial effects: the optical probe of the present utility model can be applied in extreme environments such as high temperature, low temperature, high pressure, strong corrosion, etc., so that the optical sensor can normally perform illumination, imaging, microscopic imaging, spectroscopy in the extreme environment Acquisition and other functions are convenient for the acquisition of related signals in extreme environments.

Description of drawings

1 is a three-dimensional schematic diagram of an optical probe of the present invention;

Fig. 2 is the front view of the optical probe shown in Fig. 1;

Fig. 3 is the sectional view of A-A direction in Fig. 2;

In the figure: 1, protective tube, 11, through hole, 2, probe rod, 21, window cavity, 22, accommodating cavity, 3, first annular gasket, 4, second annular gasket, 5, optical window .

detailed description

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and implement it, but the examples given are not intended to limit the present utility model.

As shown in FIG. 1-FIG. 3, the present embodiment discloses an optical probe, including a probe rod 2, a window cavity 21 and an accommodation cavity 22 for accommodating optical components are provided inside the probe rod 2, and the window cavity 21 is located in the container At the end of the cavity 22, the cavity 22 is communicated with the window cavity 21. The window cavity 21 is provided with a first annular gasket 3 and a second annular gasket 4. The first annular gasket 3 and the second annular gasket There is an optical window sheet between 4, the first annular gasket 3 and the second annular gasket 4 are abutted on the optical window sheet 5 to achieve compression sealing, the first annular gasket 3 and the second annular gasket 4 All use gold gaskets, the hardness of the optical window 5 is greater than the hardness of the gold gasket, the end of the probe rod 2 is also connected with a protective tube 1, the window cavity 21 is located inside the protective tube 1, and the top of the protective tube 1 is provided with The through hole 11 is communicated with the window cavity 21 to facilitate light transmission.

It can be understood that the optical window sheet 5 is a light-permeable component, which is not only convenient for optical detection, but also can protect the optical components inside the probe rod 2 .

Among them, the first annular gasket 3 and the second annular gasket 4 are made of gold gaskets, and the gold gaskets are metal gaskets, and their hardness (Mohs hardness) is lower than that of the optical window sheet 5, which is easy to be deformed, so that the optical The window 5 can be completely sealed with the accommodating cavity, effectively ensuring the sealing effect. In addition, gold is an inert metal, which is difficult to react with other substances, and can withstand corrosive environments such as strong acids and alkalis, and the melting point of gold ( 1064°C) is higher and can withstand high temperature. Therefore, through the setting of the gold gasket, the above optical probe can be used in extreme environments such as high temperature, low temperature, high pressure, and strong corrosion.

In one of the embodiments, the probe 2 and the protective sleeve 1 are detachably connected.

Further, a threaded connection can be adopted between the probe rod 2 and the protective cylinder 1: the outer wall of the probe rod 2 is provided with an external thread, the inner wall of the protective cylinder 1 is provided with an internal thread, and the external thread and the internal thread are screwed together. The connection method is not only easy to disassemble, but also has high connection reliability.

It can be understood that other detachable connection methods other than threaded connection can also be adopted between the probe rod 2 and the protective tube 1, such as a snap connection method and a flange connection method.

In one of the embodiments, the optical window 5 is a quartz window, a sapphire window or an infrared window.

Among them, the sapphire window has good light transmission performance, has hardness and mechanical strength unmatched by tempered glass, is resistant to drops and scratches, and has high optical transparency from vacuum ultraviolet, visible, near-infrared to mid-infrared 5.5μm. Pass rate; infrared windows are used when infrared light needs to be transmitted.

Further, infrared windows can be made of infrared material windows such as zinc selenide windows, calcium fluoride windows or barium fluoride windows, which are not easy to deliquescence and can transmit infrared light well. Rate.

In one of the embodiments, the probe 2 is made of stainless steel or Hastelloy, which has good corrosion resistance and thermal stability.

In one of the embodiments, the outer wall of the probe rod 2 is coated with a corrosion-resistant layer.

In one embodiment, the corrosion-resistant layer adopts a polytetrafluoroethylene layer, which has good resistance to strong corrosive environments such as strong acid and strong alkali.

In one embodiment, the optical assembly includes one or more of optical fibers, lenses, and filters. For example, by installing an optical fiber and a lens in the accommodating cavity 22 of the probe 2, functions such as photos and imaging can be realized; by adding a lens group, microscopic imaging functions can be realized; by adding elements such as lenses and filters, Raman can be realized Spectrum acquisition functions such as spectrum, fluorescence spectrum, and near-infrared absorption spectrum.

The optical probe of this embodiment can be used in extreme environments such as high temperature, low temperature, high pressure, and strong corrosion. For example, it can be used in a temperature environment with a temperature of -100°C to 400°C, and can also be used in a pressure below 30MPa. In a high-pressure environment, it can also be used for a long time in a reactor containing strong corrosive media such as strong acid and alkali. The optical sensor can normally perform functions such as illumination, imaging, microscopic imaging, and spectrum acquisition in extreme environments, which facilitates the acquisition of relevant signals in extreme environments.

The above-mentioned embodiments are only preferred embodiments for fully explaining the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present utility model is subject to the claims.

Claims

An optical probe is characterized in that it includes a probe rod, and the probe rod is provided with a window cavity and an accommodation cavity for accommodating an optical component, the accommodation cavity is communicated with the window cavity, and the window cavity is A first annular gasket and a second annular gasket are arranged inside, an optical window is arranged between the first annular gasket and the second annular gasket, and both the first annular gasket and the second annular gasket are Abutting on the optical window, the first annular gasket and the second annular gasket are gold gaskets, the hardness of the optical window is greater than the hardness of the gold gasket, the end of the probe rod The part is also connected with a protective tube, the window cavity is located inside the protective tube, a through hole is provided on the top of the protective tube, and the through hole is communicated with the window cavity.
The optical probe according to claim 1, wherein the probe rod and the protective sleeve are detachably connected.
The optical probe according to claim 2, wherein an outer thread is provided on the outer wall of the probe rod, an inner thread is provided on the inner wall of the protective tube, and the outer thread and the inner thread are screwed together.
The optical probe according to claim 1, wherein the optical window is a quartz window, a sapphire window or an infrared window.
The optical probe of claim 4, wherein the infrared windows comprise zinc selenide windows, calcium fluoride windows or barium fluoride windows.
The optical probe according to claim 1, wherein the probe rod is made of stainless steel or Hastelloy.
The optical probe according to claim 1, wherein the outer wall of the probe rod is coated with a corrosion-resistant layer.
The optical probe of claim 1, wherein the corrosion-resistant layer is a polytetrafluoroethylene layer.
The optical probe of claim 1, wherein the optical component comprises one or more of optical fibers, lenses and filters.