Transflective probe assembly

Abstract

The utility model relates to a transflective probe assembly, which comprises a first connecting tube, a sleeve, an optical window, a reflector, a second connecting tube and an optical fiber, the sleeve and the optical window are fixedly arranged in the first connecting tube, the optical fiber is inserted in the sleeve and is arranged opposite to the optical window, the first connecting tube is in threaded connection with the second connecting tube, and the reflector is arranged in the second connecting tube. Sealing grooves are formed in the outer wall of the first connecting pipe and the two side portions of the threaded section respectively, sealing rings are arranged in the sealing grooves, the outer sides of the sealing rings are in sealing fit with the inner wall of the second connecting pipe, the reflecting mirror is arranged in the second connecting pipe, the reflecting mirror and the optical window are oppositely arranged, and an adjustable distance is formed between the reflecting mirror and the end face of the optical window. The end, away from the optical window, of the reflector is connected with a connecting rod, the connecting rod is connected with the second connecting pipe in a threaded fit mode, a detection opening is formed in the side wall of the second connecting pipe, and the position of the detection opening corresponds to the position of the adjustable distance. According to the transflective probe assembly, the optical path can be adjusted according to detection requirements, the sealing performance can be improved, and the optical fiber is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of optical energy transmission technology in optical fibers, and in particular to a transmissive and reflective probe assembly. Background Technology

[0002] A transmissive-reflective probe is a detection device that uses fiber optic technology to detect substances. In existing technology, the transmissive-reflective probe contains two optical fibers: one fiber transmits light energy to the probe, where the light passes through the substance to be detected; the other fiber receives the reflected light and transmits it to a photodetector. The photodetector analyzes the spectrum of the light energy transmitted through the first fiber and the reflected light received through the second fiber to determine the composition of the substance. However, in existing technology, the optical path cannot be adjusted according to the detection needs, affecting the accuracy of substance detection. Furthermore, when detecting liquid substances, the liquid can easily enter the probe, causing optical path failure. Therefore, improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to address the problems of existing transmissive and reflective probe assemblies described in the background art by providing a transmissive and reflective probe assembly that can solve the aforementioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a transmissive and reflective probe assembly, comprising a first connecting tube, a sleeve, an optical window, a reflector, a second connecting tube, and an optical fiber. The sleeve and the optical window are fixedly disposed within the first connecting tube. The optical fiber is inserted into the sleeve and is positioned opposite to the optical window. The first connecting tube and the second connecting tube are threaded together. On the outer wall of the first connecting tube, sealing grooves are provided on both sides of the threaded section. A sealing ring is provided in the sealing groove, and the outer side of the sealing ring is sealed to the inner wall of the second connecting tube. The reflector is disposed within the second connecting tube and is positioned opposite to the optical window. An adjustable gap exists between the reflector and the end face of the optical window. A connecting rod is connected to the end of the reflector away from the optical window. The connecting rod is threaded to the second connecting tube. A detection port is provided on the side wall of the second connecting tube, and the position of the detection port corresponds to the position of the adjustable gap.

[0005] In the above scheme, the threaded section of the connecting rod is provided with sealing grooves on both sides, and a sealing ring is provided in the sealing groove. The outer side of the sealing ring is sealed with the inner wall of the second connecting pipe.

[0006] In the above solution, the optical window is made of sapphire or quartz, and is sealed to the first connecting tube. The material of the optical window is not limited to sapphire and quartz; other crystal materials can be selected as needed. The sealing connection method between the optical window and the first connecting tube can be selected according to the situation; for example, it can be sealed by adhesive, by a sealing ring, or by brazing.

[0007] In the above solution, the sleeve includes an inner sleeve and an outer sleeve. The inner sleeve is fixedly connected to the outer sleeve, and the inner sleeve is inserted into the first connecting tube. The end of the inner sleeve rests against the inner end face of the optical window and is fixedly connected to the first connecting tube. The end of the outer sleeve is inserted into the first connecting tube and connected to the end of the inner sleeve, and is also fixedly connected to the first connecting tube. The connection method can be selected according to the situation; for example, it can be sealed by adhesive, by a sealing ring, or by brazing.

[0008] In the above scheme, the second connecting pipe is provided with multiple detection ports, which are distributed circumferentially along the outer wall of the second connecting pipe.

[0009] In the above scheme, the detection port is trapezoidal, and the edges of the detection port are all beveled.

[0010] In the above scheme, there are multiple optical fibers, which are arranged coaxially. The optical fibers include a transmitting fiber for transmitting emitted light and a receiving fiber for transmitting reflected light. The multiple transmitting fibers and multiple receiving fibers are evenly spaced or arranged in a center-surrounding manner.

[0011] The above scheme also includes a probe body, a first protective tube, a splitter, and a second protective tube. The probe body is coaxially arranged with the first connecting tube. The optical fiber is arranged axially along the inner hole of the probe body. One end of the first protective tube is fixedly connected to the probe body, and the other end of the first protective tube is fixedly connected to the main tube of the splitter. The two branch tubes of the splitter are respectively connected to the second protective tube. The transmitting optical fiber and the receiving optical fiber are separated into two bundles at the splitter. One bundle is the transmitting optical fiber bundle, and the other bundle is the receiving optical fiber bundle. The transmitting optical fiber bundle and the receiving optical fiber bundle are respectively arranged in a second protective tube.

[0012] In the above scheme, the probe body is provided with a threaded connector, which is sleeved on the probe body. The threaded connector has a radial threaded hole, and a set screw is provided in the threaded hole. The threaded connector is axially positioned on the probe body by the set screw. The threaded connector has a sealing groove, and a sealing ring is provided in the sealing groove.

[0013] In the above scheme, the probe body is provided with a connecting tube at its end, and the first protective tube is provided with a threaded connecting tube at its end. The threaded connecting tube is fixedly connected to the internal thread inside the connecting tube, the connecting tube is fixedly connected to the probe body, and the threaded connecting tube is fixedly connected to the first protective tube.

[0014] This invention has the following advantages: 1) In the transmissive and reflective probe assembly of this invention, the optical window is fixedly connected inside the first connecting tube, while the reflector is connected to the connecting rod, and the connecting rod is threadedly connected to the second connecting tube. The reflector and the end face of the optical window have an adjustable gap. By rotating the connecting rod, the gap between the reflector and the optical window can be adjusted, thereby changing the optical path. 2) In this transmissive and reflective probe assembly, a sealing groove and a sealing ring are respectively provided on both sides of the threaded section on the outer wall of the first connecting tube. The outer side of the sealing ring seals against the inner wall of the second connecting tube, sealing the connection between the first and second connecting tubes and preventing the detected liquid from entering the first connecting tube, thus preventing damage to the optical path. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the transmissive and reflective probe assembly of this utility model.

[0016] Figure 2 This is a cross-sectional view of the transmissive and reflective probe assembly of this utility model.

[0017] Figure 3 This is a schematic diagram of the application structure of the transmissive and reflective probe assembly of this utility model.

[0018] The reference numerals in the figure are as follows: First connecting tube 1, sealing ring 11, optical window 12, sleeve 2, inner sleeve 21, outer sleeve 22, reflector 3, connecting rod 31, sealing ring 32, second connecting tube 4, detection port 41, optical fiber 5, adjustable spacing 6, probe body 7, threaded connector 71, set screw 72, connecting tube 73, sealing ring 74, first protective tube 8, threaded connecting tube 81, brancher 9, second protective tube 10. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1-2 The illustrated transmissive and reflective probe assembly includes a first connecting tube 1, a sleeve 2, an optical window 12, a reflector 3, a second connecting tube 4, and an optical fiber 5.

[0021] The first connecting pipe 1 is made of corrosion-resistant material, such as stainless steel, Hastelloy, titanium alloy, etc.

[0022] The outer wall of the first connecting pipe 1 is provided with a threaded section, and sealing grooves are provided on the left and right sides of the threaded section, and sealing rings 11 are provided in the sealing grooves.

[0023] The first connecting pipe 1 is connected to the second connecting pipe 4 by a threaded section on its outer wall.

[0024] An optical window assembly port is provided on one side of the first connecting tube 1 facing the second connecting tube 4, and the optical window 12 is fixedly installed inside the optical window assembly port.

[0025] The optical window 12 can be made of sapphire, quartz or other crystal materials, preferably sapphire. The connection method between the sapphire optical window and the first connecting tube can be selected according to the situation, such as by adhesive bonding, sealing connection by sealing ring, or sealing connection by brazing.

[0026] The sleeve 2 is inserted into the inner hole of the first connecting tube, and the end of the sleeve 2 is positioned opposite to the sapphire optical window. The sleeve 2 and the sapphire optical window are coaxially arranged.

[0027] The sleeve 2 includes an inner sleeve 21 and an outer sleeve 22. The inner sleeve 21 and the outer sleeve 22 are fixedly connected. The inner sleeve 21 is inserted into the first connecting tube 1, and its end rests against the inner end face of the optical window 12. The inner sleeve 21 is fixedly connected to the first connecting tube 1. The end of the outer sleeve 22 is inserted into the first connecting tube 1 and connected to the end of the inner sleeve 21. The outer sleeve 22 is also fixedly connected to the first connecting tube 1. The fixing method can be selected according to the situation, such as by gluing, sealing with a sealing ring, or sealing by brazing.

[0028] Optical fiber 5 is inserted into sleeve 2. Optical fiber 5 is positioned opposite to optical window 12. There are multiple optical fibers 5, which are arranged coaxially. Optical fiber 5 includes a transmitting optical fiber for transmitting emitted light and a receiving optical fiber for transmitting reflected light. The multiple transmitting optical fibers and multiple receiving optical fibers are evenly spaced or arranged in a center-surrounding manner.

[0029] In the first scheme, the transmitting and receiving optical fibers are distributed in a circular pattern on the radial cross-section of the sleeve 2, and the transmitting and receiving optical fibers are evenly spaced, that is, the transmitting and receiving optical fibers are arranged in a spaced manner.

[0030] In the second scheme, the transmitting and receiving optical fibers are arranged in a circular pattern on the radial cross-section of the sleeve 2, that is, multiple transmitting optical fibers are set in the middle position, while multiple receiving optical fibers are arranged around the outer periphery of the transmitting optical fibers.

[0031] The second connecting pipe 4 is made of corrosion-resistant material, such as stainless steel, Hastelloy, titanium alloy, etc.

[0032] The second connecting tube 4 is threadedly connected to the first connecting tube 1, and the sealing ring 11 on the outer wall of the first connecting tube 1 is sealed to the second connecting tube 4. This arrangement prevents the detected liquid from entering the second connecting tube 4, thereby preventing the liquid from damaging the optical path.

[0033] A reflector 3 is housed within the inner hole of the second connecting pipe 4, facing the optical window 12. The surfaces of the reflector 3 and the optical window 12 facing each other are highly polished reflective surfaces. An adjustable gap exists between the end faces of the reflector 3 and the optical window 12. A connecting rod 31 is connected to the end of the reflector 3 furthest from the optical window 12, and the connecting rod 31 is threaded into the second connecting pipe 4. To facilitate adjustment of the gap between the reflector 3 and the optical window 12 via the connecting rod 31, a slot can be provided on the outer end of the connecting rod 31, allowing the connecting rod 31 to be rotated using a flathead screwdriver.

[0034] A detection port 41 is provided on the side wall of the second connecting pipe 4, and the position of the detection port 41 corresponds to the position of the adjustable spacing 6.

[0035] Preferably, a plurality of detection ports 41 are provided on the second connecting pipe 4, and the plurality of detection ports 41 are distributed circumferentially along the outer wall of the second connecting pipe 4.

[0036] Preferably, the detection port 41 is trapezoidal, and the edges of the detection port 41 are all beveled.

[0037] like Figure 3 As shown, in specific applications, the transmissive and reflective probe assembly also includes a probe body 7, a first protective tube 8, a brancher 9, and a second protective tube 10.

[0038] The probe body 7 is made of corrosion-resistant material, such as stainless steel, Hastelloy, titanium alloy, etc.

[0039] The probe body 7 is coaxially arranged with the first connecting tube 1, and the optical fiber 5 is arranged axially along the inner hole of the probe body 7.

[0040] Both the first protective tube 8 and the second protective tube 10 can be made of plastic corrugated tube or metal corrugated tube. This allows the first protective tube 8 and the second protective tube 10 to be flexible and to protect the optical fiber 5 from compression.

[0041] One end of the first protective tube 8 is fixedly connected to the probe body 7, and the other end of the first protective tube 8 is fixedly connected to the main tube of the splitter 9. The two branch tubes of the splitter 9 are respectively connected to the second protective tube 10. The transmitting optical fiber and the receiving optical fiber are separated into two bundles at the splitter, one bundle is the transmitting optical fiber bundle and the other bundle is the receiving optical fiber bundle. The transmitting optical fiber bundle and the receiving optical fiber bundle are respectively set in a second protective tube 10.

[0042] To facilitate the fixed connection of the transmissive and reflective probe assembly to the container wall of the substance to be tested, a threaded connector 71 is provided on the probe body 7. The threaded connector 71 is sleeved on the probe body 7 and has a radial threaded hole with a set screw 72 in the threaded hole. The threaded connector 71 is axially positioned on the probe body 7 by the set screw 72. To ensure the sealing of the connection between the threaded connector 71 and the container wall, a sealing groove is provided on the threaded connector 71, and a sealing ring 74 is provided in the sealing groove.

[0043] To facilitate the connection between the probe body 7 and the first protective tube 8, a connecting tube 73 is provided at the end of the probe body 7, and a threaded connecting tube 81 is provided at the end of the first protective tube. The threaded connecting tube 81 is fixedly connected to the internal thread of the connecting tube 73, and the connecting tube 73 is fixedly connected to the probe body 7. For example, a set screw hole can be provided on the connecting tube, and the connecting tube can be fixedly connected to the probe body by a set screw. The threaded connecting tube 81 is fixedly connected to the first protective tube 8.

[0044] In use, the transmissive and reflective probe assembly of this utility model can be inserted into the container of the substance to be tested by extending the first connecting tube, sleeve, optical window, reflector, second connecting tube, and probe body into the container of the substance to be tested. The probe body is fixedly connected to the container wall or container lid of the substance to be tested by the threaded connector on the probe body. During connection, because the threaded connector and the probe body are sleeved, axial positioning is achieved by a set screw. Therefore, during installation, the length of the transmissive and reflective probe inserted into the container of the substance to be tested can be adjusted as needed. Then, the position of the threaded connector on the probe body is fixed by the set screw. The ends of the two second protective tubes are respectively provided with corresponding connectors, wherein the connector of the transmitting optical fiber is connected to the light source, and the connector of the receiving optical fiber is connected to the photodetector. When detecting a substance, the light energy emitted by the light source is transmitted to the optical window through the transmitting optical fiber. The light energy passes through the optical window and is transmitted to the gap between the optical window and the reflector. During detection, the first and second connecting tubes are inserted into the substance to be detected, which can be a liquid or a gas. The substance to be detected enters the gap between the optical window and the reflector. After passing through the substance, the light energy is transmitted to the reflecting surface of the reflector. After reflection, the reflected light passes through the optical window and is transmitted to the receiving optical fiber. The reflected light is transmitted to the photodetector through the receiving optical fiber. By analyzing the reflected light through the photodetector, the composition of the substance to be detected can be determined.

[0045] The transmissive and reflective probe assembly of this invention can adjust the axial movement of the reflector in the second connecting tube via a connecting rod according to the detection needs, thereby adjusting the distance between the reflector and the optical window, thus adjusting the optical path, changing the amount of substance entering the adjustable gap, and thus adjusting the intensity of the reflected light to facilitate the detection of the substance.

[0046] The transmittance and reflectance probe assembly of this invention features sealing rings on both sides of the threaded connection section of the first connecting tube. This design improves the sealing performance between the first and second connecting tubes, protecting the optical fiber inside the first connecting tube and preventing substances from entering and damaging it. Similarly, by placing sealing rings at both ends of the threaded connection section on the connecting rod in the second connecting tube, substances are prevented from entering the threaded section and corroding the threads.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the scope and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmissive and reflective probe assembly, characterized in that: The device includes a first connecting tube, a sleeve, an optical window, a reflector, a second connecting tube, and an optical fiber. The sleeve and optical window are fixedly installed inside the first connecting tube. The optical fiber is inserted into the sleeve and is positioned opposite to the optical window. The first and second connecting tubes are threaded together. On the outer wall of the first connecting tube, sealing grooves are provided on both sides of the threaded section. A sealing ring is provided in the sealing groove, and the outer side of the sealing ring is sealed to the inner wall of the second connecting tube. The reflector is installed inside the second connecting tube and is positioned opposite to the optical window. There is an adjustable gap between the end faces of the reflector and the optical window. A connecting rod is connected to the end of the reflector away from the optical window. The connecting rod is threaded to the second connecting tube. A detection port is provided on the side wall of the second connecting tube, and the position of the detection port corresponds to the position of the adjustable gap.

2. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The threaded section of the connecting rod is provided with sealing grooves on both sides, and a sealing ring is provided in the sealing groove. The outer side of the sealing ring is sealed to the inner wall of the second connecting pipe.

3. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The optical window is made of sapphire or quartz and is sealed to the first connecting tube.

4. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The sleeve includes an inner sleeve and an outer sleeve. The inner sleeve is fixedly connected to the outer sleeve. The inner sleeve is inserted into the first connecting tube. The end of the inner sleeve rests on the inner end face of the optical window and is fixedly connected to the first connecting tube. The end of the outer sleeve is inserted into the first connecting tube and is connected to the end of the inner sleeve. The outer sleeve is fixedly connected to the first connecting tube.

5. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The second connecting pipe is provided with multiple detection ports, which are distributed circumferentially along the outer wall of the second connecting pipe.

6. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The detection port is trapezoidal, and all edges of the detection port are beveled.

7. The transmittance and reflectance probe assembly according to claim 1, characterized in that: The optical fiber consists of multiple fibers arranged coaxially. The optical fiber includes a transmitting fiber for transmitting emitted light and a receiving fiber for transmitting reflected light. The multiple transmitting fibers and multiple receiving fibers are evenly spaced or arranged in a center-surrounding manner.

8. The transmittance and reflectance probe assembly according to claim 7, characterized in that: It also includes a probe body, a first protective tube, a splitter, and a second protective tube. The probe body is coaxially arranged with the first connecting tube. The optical fiber is arranged axially along the inner hole of the probe body. One end of the first protective tube is fixedly connected to the probe body, and the other end of the first protective tube is fixedly connected to the main tube of the splitter. The two branch tubes of the splitter are respectively connected to the second protective tube. The transmitting optical fiber and the receiving optical fiber are separated into two bundles at the splitter. One bundle is the transmitting optical fiber bundle, and the other bundle is the receiving optical fiber bundle. The transmitting optical fiber bundle and the receiving optical fiber bundle are respectively arranged in a second protective tube.

9. The transmittance and reflectance probe assembly according to claim 8, characterized in that: The probe body is provided with a threaded connector, which is sleeved on the probe body. The threaded connector has a radial threaded hole with a set screw in it. The threaded connector is axially positioned on the probe body by the set screw. The threaded connector has a sealing groove with a sealing ring in it.

10. The transmittance and reflectance probe assembly according to claim 8, characterized in that: The probe body is provided with a connecting tube at one end, and a threaded connecting tube is provided at the end of the first protective tube. The threaded connecting tube is fixedly connected to the internal thread inside the connecting tube. The connecting tube is fixedly connected to the probe body, and the threaded connecting tube is fixedly connected to the first protective tube.

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