Optical interface device and high-level material liquid online measurement system

Abstract

The utility model discloses an optical interface device and a high-level emptying feed liquid on-line measuring system. The optical interface device comprises a shell and an optical fiber assembly. A measuring cell and a signal channel are arranged in the shell, the interior of the measuring cell is used for allowing high-level emptying feed liquid to flow, an observation opening is formed in the side wall of the measuring cell in a penetrating mode, the signal channel is connected with the observation opening, and the central axis of the observation opening and the central axis of the signal channel are located on the same extension line. The optical fiber assembly comprises an optical signal port, and the optical signal port is installed in the signal channel, faces the observation opening and is used for transmitting an optical signal emitted by an external light source, so that the optical signal passes through the high-level emptying material liquid, and the optical signal fed back by the high-level emptying material liquid is transmitted to the signal processor. A window mirror is mounted in the observation opening, is a transparent lens, and is used for allowing an optical signal to pass through and preventing the high-level emptying material liquid from being in contact with the optical signal port. The optical interface device can prevent the signal port from being contaminated by high-level discharge liquid.

Description

Technical Field

[0001] The utility model specifically relates to an optical interface device and a high-discharge liquid online measuring system. Background Art

[0002] The nuclear fuel reprocessing process requires analysis of the element content in the radioactive process points to provide the necessary parameters for safe, reliable and effective operation of the process. In order to understand the dynamic changes in the element content in the process liquid, it is necessary to measure the high-radioactivity samples in the process pipeline online or offline.

[0003] At present, in the process of online measurement and analysis of high discharge liquid, optical interface is usually used to obtain the feedback signal of high discharge liquid, and the element content of high discharge liquid is obtained by analysis based on the feedback signal. However, the signal port such as the optical fiber head of the optical interface needs to be in close contact with the radioactive sample, which easily causes the signal port in the optical interface to be contaminated by the high discharge liquid or damaged by radiation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an optical interface device and a high-discharge liquid online measurement system in view of the above-mentioned deficiencies in the prior art. The optical interface device can prevent the optical signal port of the optical fiber from being contaminated by the high-discharge liquid or being damaged by radiation.

[0005] According to an embodiment of the first aspect of the utility model, an optical interface device is provided, comprising: a housing, an optical fiber assembly and a lens unit; a measuring cell and a signal channel are arranged in the housing, the interior of the measuring cell is used for high discharge liquid to circulate, an observation port is provided through the side wall of the measuring cell, the signal channel is connected to the observation port, the observation port and the central axis of the signal channel are on the same extension line, the optical fiber assembly comprises an optical signal port, the optical signal port is installed in the signal channel and faces the observation port, the optical signal port is used to transmit an optical signal emitted by an external light source, so that the optical signal passes through the high discharge liquid, and the optical signal fed back by the high discharge liquid is transmitted to a signal processor; the lens unit is installed in the signal channel and is located between the optical signal port and the observation port, the lens unit is used to gather the optical signal, so that the optical signal passes through the observation port; a window mirror is sealed and installed in the observation port to separate the interior of the measuring cell and the signal channel, the window mirror is a transparent lens, which is used to allow the optical signal to pass through and prevent the high discharge liquid from contacting the optical signal port.

[0006] Preferably, the lens unit includes a lens and a lens seat, the lens is installed in the lens seat, the lens is located between the optical signal port and the observation port, the lens is a convex lens, the focus of the lens is on the same extension line as the central axis of the optical signal port and the observation port, and the lens is used to focus the optical signal.

[0007] Preferably, the lens seat is cylindrical, and a smooth reflective layer is provided on the inner wall of the lens seat, and the smooth reflective layer surrounds the optical signal port and is used to gather the optical signal so that the optical signal passes through the observation port.

[0008] Preferably, the number of the observation ports is two, namely the first observation port and the second observation port, the two observation ports are arranged opposite to each other and are respectively located on the side walls at both ends of the measuring cell, the window mirror is installed in each observation port, the optical fiber component has a first type of structure and a second type of structure, the optical fiber component is set to one of the first type of structure and the second type of structure, the number of optical signal ports in the first type of structure is two, the two optical signal ports are respectively set to a signal incident end and a signal exit end, the signal incident end and the signal exit end are respectively located on both sides of the measuring cell and respectively face the first observation port and the second observation port, the signal The signal incident end transmits an optical signal into the high discharge liquid, and the signal output end is used to transmit the optical signal fed back by the high discharge liquid out; the number of optical signal ports in the second type of structure is one, which is set as a signal transmission end, and the second type of structure also includes a signal reflection end, the signal transmission end and the signal reflection end are respectively located on both sides of the measuring cell, and respectively face the first observation port and the second observation port, the signal transmission end is used to transmit the optical signal into the high discharge liquid, the signal reflection end is used to reflect the optical signal fed back by the high discharge liquid back to the signal transmission end, and the signal transmission end is also used to transmit the optical signal out.

[0009] Preferably, the signal channel is arranged in sections, including a first accommodating section and a second accommodating section, the first accommodating section and the second accommodating section are respectively located on both sides of the measuring cell, the first accommodating section is connected to the first observation port, and the second accommodating section is connected to the second observation port; when the optical fiber assembly adopts the first type of structure, the signal incident end is installed in the first accommodating section and faces the first observation port, and the signal output end is installed in the second accommodating section and faces the second observation port; when the optical fiber assembly adopts the second type of structure, the signal transmission end is installed in the first accommodating section and faces the first observation port, and the signal reflection end is installed in the second accommodating section and faces the second observation port.

[0010] Preferably, when the optical fiber assembly adopts the first type of structure, the number of lens units is two, namely a first lens unit and a second lens unit. The first lens unit is installed in the first accommodating section and is located between the signal incident end and the first observation port, and is used to focus the optical signal transmitted from the signal incident end so that the optical signal can pass through the first observation port. The second lens unit is installed in the second accommodating section and is located between the signal output end and the second observation port, and is used to focus the optical signal of high discharge liquid feedback so that the signal output end can transmit the optical signal.

[0011] Preferably, when the optical fiber assembly adopts the second type of structure, the number of the lens unit is one, which is set to be a third lens unit. The third lens unit is installed in the first accommodating section and is located between the signal transmission end and the first observation port. The third lens unit is used to gather the light signal transmitted from the signal incident end and the light signal reflected back from the signal reflection end.

[0012] Preferably, a sealing unit is provided between the window mirror and the measuring cell, and the sealing unit is used to seal the gap between the observation port and the window mirror.

[0013] Preferably, the thickness of the window mirror extends along the central axis direction of the signal channel, and the sealing unit includes a locking piece and a first sealing ring, the first sealing ring is sleeved on one end of the window mirror close to the measuring cell, and the first sealing ring is located in the measuring cell, the first sealing ring extends radially outward along the window mirror, and its side surface is attached to the inner wall of the measuring cell, the locking piece passes through the first sealing ring and is connected to the inner wall of the measuring cell, so as to position the first sealing ring.

[0014] According to an embodiment of the second aspect of the utility model, there is provided a high discharge liquid online measurement system, comprising a processor, a pumping unit and an optical interface device; the pumping unit is connected to a measuring cell in the optical interface device, and is used to pump high discharge liquid into the measuring cell; the optical interface device is used to transmit an optical signal emitted by an external light source to the high discharge liquid, and transmit an optical signal fed back by the high discharge liquid to a signal processor external to the optical interface device; the processor is electrically connected to an optical signal port of the optical interface device, and is used to receive an optical signal fed back by the high discharge liquid, and analyze the element content in the high discharge liquid according to the optical signal.

[0015] The measuring cell in the optical interface device of the utility model is used for high discharge liquid to flow through. By setting an observation port on the measuring cell, the optical signal port can transmit the optical signal emitted by the external light source, so that the optical signal passes through the high discharge liquid, and transmits the optical signal fed back by the high discharge liquid to the signal processor. The signal processor can analyze the feedback optical signal to obtain the element content in the high discharge liquid. Specifically, a lens unit is provided between the optical signal port and the observation port, and the lens unit is used to gather the optical signal so that the optical signal can pass through the observation port and pass through the high discharge liquid, and then the optical signal port can transmit the optical signal fed back by the high discharge liquid.

[0016] Furthermore, the online high-discharge liquid logistics is prone to splashing. The optical interface can effectively block the splashing high-discharge liquid by installing a transparent window mirror at the observation port, avoiding the optical signal port from being contaminated by the high-discharge liquid, and will not affect the optical analysis of the high-discharge liquid. A sealing unit is also provided between the window mirror and the observation port, which can seal the gap between the observation port and the window mirror to avoid leakage of radioactive aerosols in the high-discharge liquid. Moreover, the optical interface can avoid dispersion of the optical signal by setting a lens unit. While ensuring that the optical signal can pass through the observation port, there is no need to set a large-diameter observation port, further avoiding leakage of high-level waste liquid or radioactive aerosols from the measurement pool.

[0017] In summary, the optical interface device can realize the online measurement of high discharge liquid and can effectively prevent the optical signal port of the optical fiber from being contaminated by the high discharge liquid or being damaged by radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an optical interface device of the first type of structure using an optical fiber assembly in an embodiment of the utility model;

[0019] Figure 2 It is a schematic structural diagram of an optical interface device of the second type of structure using an optical fiber assembly in an embodiment of the utility model.

[0020] In the figure: 1-housing, 2-measuring cell, 3-signal channel, 4-window mirror, 5-sealing unit, 51-locking piece, 52-first sealing ring, 6-second sealing ring, 7-first lens unit, 8-second lens unit, 9-incident optical fiber, 10-exit optical fiber, 11-third lens unit, 12-dual-channel optical fiber, 13-lens support seat, 14-lens pressure seat, 15-lens, 16-signal reflecting end, 17-reflector seat, 18-reflector pressure seat. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of the present invention, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "setting", "installation", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] In order to facilitate the understanding of the present invention, the spectral element analysis process in the high discharge liquid is first explained. In the existing spectral analysis process of the high discharge liquid, it is necessary to sample the high discharge liquid and then analyze it offline. In the process of detection and analysis, it is usually necessary to respectively set a light source and a receiving device on both sides of the high discharge liquid. The light source and the receiving device are relatively arranged. The light source sends a light signal to the high discharge liquid, and the receiving device receives the light signal after being absorbed by the high discharge liquid, that is, the light signal fed back by the high discharge liquid. When the light signal passes through the high discharge liquid, the high discharge liquid will absorb part of the light. Since the high discharge liquids with different element contents have different absorption rates for the light signal, the processor in the spectrometer can analyze the light signal fed back by the high discharge liquid to obtain the content of different elements in the high discharge liquid.

[0026] This analysis method will cause the analysis of the element content in the material to lag behind, which is not conducive to the immediate adjustment of relevant parameters in the post-processing process. However, if online measurement and analysis is performed, the fiber head needs to be close to the flow cell (i.e., the measurement cell). The high-discharge liquid flowing in the flow cell is prone to splashing, causing the fiber head to be contaminated with high-discharge liquid, and even radiation damage.

[0027] Example 1

[0028] See also Figure 1 The utility model discloses an optical interface device, which includes: a housing 1, an optical fiber assembly and a lens unit.

[0029] Among them, a measuring cell 2 and a signal channel 3 are provided in the housing 1. The measuring cell 2 is used for the high discharge liquid to circulate. An observation port is provided through the side wall of the measuring cell 2. The signal channel 3 is connected to the observation port. The observation port and the central axis of the signal channel 3 are on the same extension line. The optical fiber assembly includes an optical signal port, which is installed in the signal channel 3 and faces the observation port. The optical signal port is used to transmit the optical signal emitted by the external light source so that the optical signal passes through the high discharge liquid and transmits the optical signal fed back by the high discharge liquid to the signal processor. The lens unit is installed in the signal channel and is located between the optical signal port and the observation port. The lens unit is used to gather the optical signal so that the optical signal passes through the observation port. A window mirror 4 is installed in the observation port to separate the inside of the measuring cell and the signal channel. The window mirror 4 is a transparent lens used for allowing the optical signal to pass through and blocking the high discharge liquid from contacting the optical signal port. A sealing unit 5 is provided between the window mirror 4 and the measuring cell 2. The sealing unit 5 is used to seal the gap between the observation port and the window mirror 4.

[0030] It should be noted that the optical interface device in this embodiment is mainly used for spectral analysis of high discharge liquid in the nuclear fuel post-processing process.

[0031] In view of the problem in the prior art that the optical interface device is easily contaminated by the high discharge liquid or damaged by radiation during the online analysis process of the high discharge liquid, the optical interface device of the present invention is provided with a window mirror 4 on the observation port of the measuring cell 2, and the window mirror 4 is made of fused quartz material, which is a transparent material with a thickness range of 1mm-1cm. For example, the thickness of the window mirror 4 is 20mm. The advantage of using such a window mirror 4 is that it can not only ensure the transmittance of the optical signal, but also effectively block the high discharge liquid, thereby preventing the high discharge liquid from causing radiation damage to the optical signal port.

[0032] Specifically, in this embodiment, the measuring cell 2 is used for high discharge liquid to flow through. By setting an observation port on the measuring cell 2, the optical signal port can transmit the optical signal emitted by the external light source, so that the optical signal passes through the observation port and passes through the high discharge liquid. The optical signal port is also used to transmit the optical signal fed back by the high discharge liquid to the signal processor, and the signal processor can analyze the feedback optical signal to obtain the element content in the high discharge liquid. Specifically, a lens unit is provided between the optical signal port and the observation port, and the lens unit is used to gather the optical signal so that the optical signal can pass through the observation port and pass through the high discharge liquid, and then the optical signal port can transmit the optical signal fed back by the high discharge liquid.

[0033] Specifically, the lens unit includes a lens and a lens seat. The lens is installed in the lens seat. The lens is located between the optical signal port and the observation port. The focus of the lens is on the same extension line as the central axis of the optical signal port and the observation port. The lens is used to focus the optical signal.

[0034] In this embodiment, the lens is a convex lens to achieve the effect of focusing the light signal. Of course, the lens can also adopt other existing focusing structures as long as it can achieve the focusing of the light signal. An annular groove is provided on the inner side of the lens seat, and the groove is adapted to the shape of the lens. The edge of the lens is snapped into the groove to position the lens.

[0035] Furthermore, the lens seat is cylindrical, and a smooth reflective layer is provided on the inner side wall of the lens seat, and the smooth reflective layer surrounds the optical signal port and is used to gather the optical signal so that the optical signal passes through the observation port. Setting the inner wall of the lens seat as a smooth reflective layer can further gather the optical signal so that the optical signal can pass through the observation port. Exemplarily, the lens seat can be made of stainless steel material, and then the inner side wall is ground and polished to form a smooth reflective layer. Of course, the lens seat can also be made of other materials as long as the effect of light signal reflection and gathering can be achieved. For example, the lens seat can be made of lead material, and then the inner side wall of the lens is coated to form a smooth reflective layer.

[0036] The composition structure of the lens unit is described as follows: the lens seat is composed of a first mounting part and a second mounting part, one end of the first mounting part is provided with an arc-shaped concave surface, and the second mounting part is also provided with an arc-shaped concave surface at the opposite end. During installation, one of the mounting parts can be used as a lens support seat 13, and the other mounting part can be used as a lens pressure seat 14. The lens 15 is placed in the arc-shaped concave surface of the lens support seat 13, and then the lens 15 is pressed by the lens pressure seat 14. When the lens support seat 13 and the lens pressure seat 14 are spliced ​​together, the two arc-shaped concave surfaces can be combined into an annular groove. The edge of the lens 15 is snapped into the groove, thereby realizing the limitation of the lens 15, and the transparent can be easily installed and sealed. Specifically, the first mounting part and the second mounting part of the lens unit can be connected by means of threads.

[0037] The inner diameters of the lens support seat 13, the lens pressing seat 14 and the window mirror 4 are consistent, which is convenient for connection with the optical fiber, and the overall structure is easy to repair and disassemble. The inner walls of the lens support seat 13 and the lens pressing seat 14 are smooth and have good passability.

[0038] In this embodiment, the advantages of the lens unit are: first, the light signal can be focused by a convex lens, and while ensuring that the light signal can pass through the observation port, there is no need to set a large-diameter observation port, which is beneficial to reducing the leakage of high-discharge liquid; second, the light signal can be reflected by a smooth reflective layer, further improving the passability of the light signal.

[0039] Online high-release liquid logistics is prone to splashing. This optical interface can effectively block splashing high-release liquid by setting a transparent window mirror 4 at the observation port, avoiding contamination of the optical signal port by the high-release liquid, and will not affect the optical analysis of the high-release liquid. Moreover, this optical interface can avoid dispersion of the optical signal by setting a lens unit. While ensuring that the optical signal can pass through the observation port, there is no need to set a large-diameter observation port, further avoiding leakage of high-level waste liquid or radioactive aerosols from the measurement pool. Furthermore, a sealing unit 5 is also provided between the window mirror 4 and the observation port, which can seal the gap between the observation port and the window mirror 4 to avoid leakage of radioactive aerosols in the high-release liquid. Specifically, the thickness of the window mirror 4 extends along the central axis direction of the signal channel 3, and the sealing unit 5 includes a locking member 51 and a first sealing ring 52. The first sealing ring 52 is sleeved on one end of the window mirror 4 close to the measuring cell 2, and the first sealing ring 52 is located in the measuring cell 2. The first sealing ring 52 extends radially outward from the window mirror 4, and its side is attached to the inner wall of the measuring cell 2. The locking member 51 passes through the first sealing ring 52 and is connected to the inner wall of the measuring cell 2 to position the first sealing ring 52. The sealing unit 5 is provided to cooperate with the window mirror 4 to seal the gap between the observation port and the window mirror 4. The advantage of this arrangement is that it can further improve the barrier performance of the window mirror 4 and prevent the leakage of radioactive aerosols in the high discharge liquid.

[0040] Specifically, the first sealing ring 52 can be made of elastic materials such as silicone or rubber, with an inner diameter smaller than the diameter of the window mirror 4, and is sleeved on the window mirror 4 by elastic force, so as to seal the gap between the window mirror 4 and the observation port. Furthermore, the locking member 51 can adopt a bolt and nut structure, and the first sealing ring 52 is positioned and installed by bolts and nuts.

[0041] In summary, the optical interface device can realize the online measurement of high discharge liquid and can effectively prevent the optical signal port of the optical fiber from being contaminated by the high discharge liquid or being damaged by radiation.

[0042] See also Figure 1 and Figure 2 In this embodiment, there are two observation ports, namely a first observation port and a second observation port. The two observation ports are arranged opposite to each other and are respectively located on the side walls at both ends of the measuring pool 2. A window mirror 4 is installed in each observation port.

[0043] The optical fiber component has a first structure and a second structure, and the optical fiber component is configured as one of the first structure and the second structure.

[0044] In the first type of structure, there are two optical signal ports, which are respectively set as a signal input end and a signal output end. The signal input end and the signal output end are respectively located on both sides of the measuring cell 2 and are respectively facing the first observation port and the second observation port. The signal input end transmits an optical signal into the high discharge liquid, and the signal output end is used to transmit the optical signal fed back by the high discharge liquid.

[0045] The number of optical signal ports in the second type of structure is one, which is set as a signal transmission end. The second type of structure also includes a signal reflection end 16. The signal transmission end and the signal reflection end 16 are respectively located on both sides of the measuring cell 2 and are respectively facing the first observation port and the second observation port. The signal transmission end is used to transmit the optical signal into the high discharge liquid, and the signal reflection end 16 is used to reflect the optical signal fed back by the high discharge liquid back to the signal transmission end. The signal transmission end is also used to transmit the optical signal out.

[0046] Specifically, the housing 1 of the optical interface device is configured to be long and cylindrical, and the signal channel 3 extends along the central axis of the housing 1 and penetrates the housing 1. The measuring cell 2 is located in the middle of the housing 1, and divides the signal channel 3 into two sections. That is, the signal channel 3 is configured in sections, including a first accommodating section and a second accommodating section, the first accommodating section and the second accommodating section are respectively located on both sides of the measuring cell 2, the first accommodating section is connected to the first observation port, and the second accommodating section is connected to the second observation port.

[0047] The optical fiber assembly is installed in the signal channel 3. To ensure the quality of optical signal transmission, the first accommodating section and the second accommodating section of the signal channel 3 are on the same extension line as the central axes of the first observation port and the second observation port.

[0048] In this embodiment, two structures of optical fiber components are provided, namely a first type structure and a second type structure, and the optical fiber component is configured as one of the first type structure and the second type structure. Figure 1 The optical fiber assembly in is the first type of structure. Figure 2 The optical fiber assembly in is the second type of structure.

[0049] See also Figure 1 In some embodiments, the optical fiber assembly adopts the first type of structure. The first type of structure is a dual optical fiber structure. When the optical fiber assembly adopts the first type of structure, the signal input end is installed in the first accommodating section and faces the first observation port, and the signal output end is installed in the second accommodating section and faces the second observation port.

[0050] The first type of structure of the optical fiber assembly also includes an input optical fiber 9 and an output optical fiber 10. The input optical fiber 9 is partially inserted into the first accommodating section and connected to the signal input end, and is used to transmit the optical signal to the signal input end. The output optical fiber 10 is partially inserted into the second accommodating section and connected to the signal output end, and is used to upload the optical signal received by the signal output end to the spectrometer for element content analysis and detection.

[0051] Further, the principle of the first type of structure of the optical fiber assembly is to respectively set a signal input end and a signal output end in the first accommodating section and the second accommodating section, the signal input end and the signal output end are arranged relatively, and the measuring cell 2 is located between the two optical signal ports. The signal input end transmits the optical signal emitted by the external light source to the first observation port, so that the optical signal passes through the high discharge liquid. At this time, the high discharge liquid will absorb part of the optical signal to form an optical signal fed back by the high discharge liquid. The signal output end is used to upload the optical signal fed back by the high discharge liquid to the signal processor in the spectrometer, perform signal processing, and obtain the element content in the high discharge liquid. Specifically, the signal input end and the signal output end can use commercially available optical fiber heads.

[0052] Please continue reading Figure 1 In order to further reduce the risk of leakage of high discharge liquid and radioactive aerosol, in this embodiment, the diameter of the observation port can be set to 10mm-3cm, that is, the opening of the observation port is very small. However, when the optical signal port sends out an optical signal, the optical signal will be dispersed, resulting in a part of the optical signal being unable to pass through the observation port and the window mirror 4, resulting in optical signal loss.

[0053] Preferably, when the optical fiber assembly adopts the first type of structure, the number of lens units is two, namely the first lens unit and the second lens unit. The first lens unit 7 is installed in the first accommodating section and is located between the signal incident end and the first observation port, and is used to focus the optical signal transmitted from the signal incident end so that the optical signal can pass through the first observation port. The second lens unit 8 is installed in the second accommodating section and is located between the signal output end and the second observation port, and is used to focus the optical signal fed back by the high discharge liquid so that the signal output end can transmit the optical signal.

[0054] The first lens unit and the second lens unit can both adopt the aforementioned lens units. Specifically, the first lens unit 7 includes a first lens seat and a first lens, the first lens seat is installed in the first accommodating section, the first lens is connected to the first lens seat, the first lens is located between the signal incident end and the first observation port, and is used to gather the light signal emitted from the signal incident end. The second lens unit 8 includes a second lens seat and a second lens, the second lens seat is installed in the second accommodating section, the second lens is connected to the second lens seat, the second lens is located between the second observation port and the signal emission end, and the second lens is used to gather the light signal passing through the measuring cell 2.

[0055] The first lens seat and the second lens seat are both cylindrical, and the inner side walls of the first lens seat and the second lens seat are both provided with a smooth reflective layer for collecting light signals. The first lens seat surrounds the signal incident end, and the second lens seat surrounds the signal exit end. Setting the inner wall of the lens seat as a smooth reflective layer can further collect the light signal so that the light signal can pass through the observation port.

[0056] Furthermore, in order to ensure the transmission quality of the optical signal, the central axes of the signal incident end, the first lens, the window mirror 4, the second lens and the signal output end are on the same extended axis. Moreover, the axes of the incident optical fiber 9, the output optical fiber 10, the window mirror 4 and the focus of the lens should also be kept in the same straight line to facilitate the alignment of the optical path and improve the quality of the optical signal.

[0057] Continue as Figure 1 As shown, in the optical fiber assembly adopting the first type of structure, the optical fiber assembly adopts a dual-path optical fiber. In order to ensure the transmission effect of the optical signal and reduce the dispersion, the two lenses are symmetrical with the center of the measuring cell 2 to eliminate the dispersion and ensure that the optical paths of the incident light from the lens to the incident optical fiber 9 and the outgoing optical fiber 10 are parallel optical paths.

[0058] See also Figure 2 In some other embodiments, the optical fiber assembly adopts the second type of structure. The second type of structure is a single optical fiber structure. When the optical fiber assembly adopts the second type of structure, the signal transmission end is installed in the first accommodating section and faces the first observation port, and the signal reflection end 16 is installed in the second accommodating section and faces the second observation port.

[0059] The second type of structure of the optical fiber assembly also includes a dual-channel optical fiber 12, which is partially inserted into the first accommodating section and connected to the signal transmission end for transmitting optical signals to the signal transmission end and for uploading the feedback signal reflected from the signal reflection end to the spectrometer for analysis.

[0060] When the optical fiber assembly adopts the second type of structure, the signal transmission end is installed in the first accommodating section and faces the first observation port, and the signal reflection end 16 is installed in the second accommodating section and faces the second observation port. The principle of the second type of structure of the optical fiber assembly is to send a light signal to the first observation port through the signal transmission end in the first accommodating section. When the light signal passes through the high discharge liquid, the high discharge liquid will absorb part of the light signal to form a light signal fed back by the high discharge liquid. Then, the light signal fed back by the high discharge liquid will be reflected back to the signal transmission end by the signal reflection end 16 in the second accommodating section. The signal transmission end is also used to receive the reflected light signal and upload the light signal to the processor of the spectrometer for processing to obtain the element content in the high discharge liquid.

[0061] Among them, the signal transmission end can adopt existing optical fiber head equipment, such as commercially available optical fiber couplers, etc., as long as it can realize the emission and reception of optical signals. The signal reflection end 16 can adopt an existing reflector. Exemplarily, the signal reflection end 16 can be installed by a reflector seat 17 and a reflector pressure seat 18. The reflector seat 17 and the reflector pressure seat 18 are connected by threads, and a groove that matches the shape of the outer edge of the reflector is provided on the inner side of the connection between the reflector seat 17 and the reflector pressure seat 18, so that the reflector can be clamped in the groove. The reflector seat 17 and the reflector pressure seat 18 are both configured to be cylindrical, so as to facilitate the installation of the second accommodating section. The reflector seat 17 and the reflector pressure seat 18 can also be provided with a smooth reflection layer, so as to gather the optical signal by reflection.

[0062] Continue as Figure 2 As shown, when the optical fiber assembly adopts the second type of structure, the number of lens units is one, which is set as the third lens unit. The third lens unit 11 is installed in the first accommodating section and is located between the signal transmission end and the first observation port. The third lens unit 11 is used to collect the optical signal transmitted from the signal incident end and the optical signal reflected back from the signal reflection end 16 to reduce dispersion and ensure that the optical signal can pass through the observation port, thereby improving the transmission efficiency of the optical signal.

[0063] The third lens unit can also adopt the aforementioned lens unit. Specifically, the third lens unit 11 includes a third lens seat and a third lens. The third lens seat is installed in the first accommodating section. The third lens is connected to the third lens seat. The third lens is located between the signal transmission end and the first observation port. An annular groove is provided on the inner side of the third lens seat, and the groove is adapted to the shape of the third lens. The edge of the lens is snapped into the groove to position the lens. The third lens seat is cylindrical, and a smooth reflective layer is also provided on the inner side wall of the third lens seat for focusing the optical signal. The third lens seat surrounds the signal transmission end.

[0064] Furthermore, in the second type of structure of the optical fiber assembly, the axes of the third lens and the reflector are the same axis. The advantage of this arrangement is that it can eliminate dispersion and ensure the quality of the optical signal.

[0065] According to the above description of the first and second structures of the optical fiber assembly, it can be seen that no matter the first or second structure is used, the optical fiber assembly includes an optical signal port. The difference is that the first structure adopts a dual-fiber (i.e., dual-port) structural design, while the second structure adopts a single-fiber (i.e., single-port) structural design with a reflector.

[0066] Moreover, no matter whether the first type structure or the second type structure of the optical fiber assembly is adopted, the number of lens units in the optical interface device is consistent with the number of optical signal ports, that is, each lens unit corresponds to one optical signal port. In other words, in the first type structure, the number of optical signal ports is two, and the number of lens units is also two, one of the lens units (i.e., the first lens unit 7) is located between the signal incident end and the first observation port, and the other lens unit (i.e., the second lens unit 8) is located between the signal output end and the second observation port. In the second type structure, the number of optical signal ports is one, and the number of lens units is also one, and the lens unit (i.e., the third lens unit 11) is located between the signal transmission end and the first observation port.

[0067] The lens unit is used to gather the optical signal emitted by the optical signal port so that the optical signal can pass through the observation port, thereby avoiding the loss of the optical signal. In addition, the lens unit can also be used to gather the optical signal fed back by the high discharge liquid so that the optical fiber head can receive the optical signal. By setting the lens unit to correspond to each optical signal port respectively, it is helpful to reduce the opening diameter of the observation port, further reducing the risk of splashing of the high discharge liquid.

[0068] It is worth noting that in order to distinguish lens units at different positions, Figure 1 , 2 In the embodiment, different numbers are used for lens units at different positions (first lens unit 7, second lens unit 8 and third lens unit 11), but the above-mentioned lens units can all use lens units with the same structure (ie, the above-mentioned lens units).

[0069] Furthermore, if Figure 1 and Figure 2 As shown, the optical interface device further includes a second sealing ring 6, which is sleeved on the outer wall of the lens unit and located at one end close to the window mirror 4. The sealing ring is located between the housing 1 and the lens unit, and is used to seal the gap between the lens seat and the housing 1. At the same time, the second sealing ring 6 is also used to seal and package the window mirror 4 and the lens seat. In other words, the window mirror 4 is sealed and packaged with the measuring cell 2 by tightening the bolts and the first sealing ring 52, and the window mirror 4 and the lens pressing seat 14 are sealed and packaged by the second sealing ring 6.

[0070] Specific examples of optical interface devices using the first type of structure (optical fiber assembly) and optical interface devices using the second type of structure (optical fiber assembly) will be presented below, and further explanations will be given.

[0071] Example 1

[0072] See also Figure 1In this example, the optical fiber assembly in the optical interface device adopts the first type of structure. This example will be described in combination with the first type of structure of the optical fiber assembly and other parts of the optical interface device (housing 1, first lens unit 7 and second lens unit 8).

[0073] like Figure 1 As shown, a measuring cell 2 and a signal channel 3 are arranged in a housing 1 in the optical interface device, and the interior of the measuring cell 2 is used for high discharge liquid to flow. The optical fiber assembly is arranged in the signal channel 3. The optical fiber assembly includes a signal input end, a signal output end, an input optical fiber 9, and an output optical fiber 10.

[0074] A first observation port and a second observation port are respectively provided on both sides of the measuring cell 2, and the first observation port and the second observation port are arranged opposite to each other. A window mirror 4 is installed in both the first observation port and the second observation port to prevent the splashing of the liquid in the measuring cell 2. The window mirror 4 is a transparent lens to facilitate the passage of the optical signal and reduce the loss of the optical signal. The signal channel 3 is arranged in sections, wherein the first accommodating section is connected to the first observation port, and the second accommodating section is connected to the second observation port.

[0075] The signal input end is installed in the first accommodating section, and the signal output end is installed in the second accommodating section. The input optical fiber 9 is inserted in the first accommodating section and connected to the signal input end, and is used to transmit the optical signal to the signal input end, and the optical signal is injected into the high discharge liquid through the signal input end. When the optical signal passes through the high discharge liquid, the high discharge liquid absorbs the optical signal, thereby generating an optical signal fed back by the high discharge liquid. The signal output end uploads the optical signal fed back by the high discharge liquid to the spectrometer via the output optical fiber 10 for processing, and obtains the element content in the high discharge liquid.

[0076] like Figure 1 As shown, the first lens unit 7 includes a lens and a lens seat. The inner wall of the lens seat is smooth and has good passability. At the same time, a groove that fits the lens is provided inside the lens seat to facilitate the installation and sealing of the lens. The lens is fixed to the ends of the output optical fiber 10 and the input optical fiber 9 in the optical interface housing 1 through the lens seat, and cooperates with the second sealing ring 6 to improve the sealing performance. The number of the second sealing ring 6 is one or more, such as Figure 1 As shown, the second sealing ring 6 is sleeved on the outside of the lens seat and is located at one end close to the window mirror 4. The second sealing ring 6 is used to seal and encapsulate the window mirror 4 and the lens seat, and is also used to seal the gap between the lens unit and the housing 1.

[0077] The axis of the output optical fiber 10, the input optical fiber 9, the window mirror 4 and the focus of the lens are kept in the same straight line, the inner wall of the cavity of the measuring cell 2 is smooth and the opening is small, and the two lenses are centrally symmetrical about the center of the flow cell to eliminate chromatic aberration and improve the quality of the optical signal. The inner diameters of the lens seat, the lens pressure seat 14 and the window mirror 4 are consistent, which is convenient for connection with the optical fiber, and the overall structure is easy to repair and disassemble.

[0078] The measuring cell 2 and the window mirror 4 are encapsulated in the housing 1 of the optical interface through the measuring head locking device (i.e., the locking member 51), and a sealing gasket is provided between the measuring cell 2 and the window mirror 4. When the measuring cell 2 and the window mirror 4 are tightened by bolts, the optical interface as a whole can be ensured to have good sealing performance. The measuring head locking device includes a locking bolt and a locking nut. Among them, the locking bolt passes through the side wall of the measuring cell 2 and is connected to the housing 1, and then the measuring cell 2, the sealing gasket and the window mirror 4 are pressed by the locking nut, so that the above components are fixed in the housing 1.

[0079] The measurement process of the optical interface device is as follows: a dual-fiber optical interface is arranged on the high-discharge liquid measurement device, the optical fiber and the optical interface are connected through a lens seat, the cavity of the measurement pool 2 is connected to the sample flow pipeline, and sealing measures are taken. The incident light passes through the sample from the incident optical fiber 9 through the lens and the window mirror 4, and the light signal absorbed by the sample passes through the window mirror 4 and the lens at the other end in turn, and finally reaches the optical signal measurement spectrometer of the online measurement device through the output optical fiber 10. The content of the element to be analyzed in the sample pool can be determined by further analyzing the light signal data.

[0080] In this example, the advantage of the optical interface device is that, by arranging the lenses symmetrically, dispersion can be eliminated, thereby further improving the quality of optical signal transmission.

[0081] Example 2

[0082] See also Figure 2 In this example, the optical fiber assembly in the optical interface device adopts the second type of structure. This example will be described in combination with the second type of structure of the optical fiber assembly and other parts of the optical interface device (housing 1, third lens unit 11).

[0083] See also Figure 2 The housing 1 in the optical interface device is provided with a measuring cell 2 and a signal channel 3, and the interior of the measuring cell 2 is used for the high discharge liquid to flow. The optical fiber assembly is arranged in the signal channel 3. The optical fiber assembly includes a signal transmission end, a signal reflection end 16, and a dual-channel optical fiber 12.

[0084] A first observation port and a second observation port are respectively provided on both sides of the measuring cell 2, and the first observation port and the second observation port are arranged opposite to each other. A window mirror 4 is installed in both the first observation port and the second observation port to prevent the splashing of the liquid in the measuring cell 2. The window mirror 4 is a transparent lens to facilitate the passage of the optical signal and reduce the loss of the optical signal. The signal channel 3 is arranged in sections, wherein the first accommodating section is connected to the first observation port, and the second accommodating section is connected to the second observation port.

[0085] The signal transmission end is installed in the first accommodating section and faces the first observation port, and the signal reflection end 16 is installed in the second accommodating section and faces the second observation port. The dual-channel optical fiber 12 is partially inserted in the first accommodating section. The dual-channel optical fiber 12 transmits the optical signal to the signal transmission end, and transmits the optical signal to the high discharge liquid through the signal transmission end through the first observation port. When the optical signal passes through the high discharge liquid, the high discharge liquid will absorb part of the optical signal to form an optical signal fed back by the high discharge liquid. Then the optical signal fed back by the high discharge liquid passes through the second observation port and is reflected back to the signal transmission end by the signal reflection end 16 in the second accommodating section. The signal transmission end and the dual-channel optical fiber 12 are also used to upload the reflected feedback optical signal to the processor of the spectrometer for processing to obtain the element content in the high discharge liquid.

[0086] like Figure 2 As shown, the axis of the dual-channel optical fiber 12, the window mirror 4 and the reflector and the focus of the lens are kept in the same straight line, and the inner wall of the cavity of the measuring cell 2 is smooth and the opening is small. The inner diameters of the lens seat, the lens pressure seat 14 and the window mirror 4 are consistent, which is convenient for connection with the optical fiber, and the overall structure is easy to repair and disassemble. The inner wall of the lens seat and the lens pressure seat 14 is smooth and has good passability. At the same time, a groove that fits the lens is opened near the lens end of the lens seat and the lens pressure seat 14, which is convenient for the installation and sealing of the lens. The lens is fixed to the end of the incident and output optical fiber 10 in the optical interface housing 1 through the lens seat and the lens pressure seat 14, and the second sealing ring 6 is used to improve the sealing performance. The measuring cell 2 and the window mirror 4 are encapsulated in the optical interface housing 1 through the measuring head locking device, and a first sealing ring 52 is provided between the measuring cell 2 and the window mirror 4. When the measuring cell 2 and the window mirror 4 are tightened by bolts, it can ensure that the optical interface as a whole has good sealing performance.

[0087] The detection process of the optical interface device is as follows: a single optical fiber optical signal port (i.e., signal transmission end) is arranged on the high-level sample measurement device, the optical fiber and the optical interface are connected through a lens seat, the middle cavity of the measurement cell 2 is connected to the sample flow pipe, and sealing measures are taken. The incident light passes through the lens and the window mirror 4 from the dual-channel optical fiber 12 to the sample cell, and the absorbed light after passing through the sample is totally reflected by the reflector and passes through the sample again, and then passes through the window mirror 4 and the lens in sequence, and finally reaches the optical signal measurement spectrometer of the online measurement device through the incident and output optical fibers 10. The content of the element to be analyzed in the sample cell can be determined by further analyzing the optical signal data.

[0088] In this example, the advantage of the optical interface device is that it only needs to connect one optical cable, its structure is lighter and simpler, and the overall assembly and disassembly is more convenient. In addition, the axis of the lens and the reflector are on the same axis, which can eliminate dispersion and ensure the quality of the optical signal.

[0089] In summary, no matter the optical fiber assembly adopts the first type of structure or the second type of structure, the optical interface device can realize online measurement of high-radiation materials while preventing the optical signal port of the optical fiber from being contaminated by high-radiation liquid or irradiated. In addition, the overall structure of the optical interface device is simple, online measurement is possible, the sensitivity is high, and it is easy to replace and maintain. The optical interface with good sealing reduces the dispersion of optical signals during spectral measurement, ensures the quality of optical signals, and thus ensures the accuracy and reliability of sample analysis data.

[0090] The optical interface device has the following notable features:

[0091] (1) The optical fiber interface is suitable for dual optical fiber paths for online measurement (see Appendix Figure 1 ) and single fiber optical path (see Appendix Figure 2 ).

[0092] (2) When there are two optical fibers in the optical fiber interface, the lenses are arranged symmetrically to eliminate dispersion and ensure the quality of the optical signal. When there is a single optical fiber in the optical fiber interface, the axis of the lens and the reflector are on the same axis to eliminate dispersion and ensure the quality of the optical signal.

[0093] (3) The compact modular design is easy to install and has high sensitivity. It allows maintenance and replacement of components such as lenses without removing the sample cell.

[0094] (4) Use the measuring head locking device, locking bolts and nuts and sealing rings to improve the sealing performance of the overall structure.

[0095] Example 2

[0096] The utility model also discloses an online measuring device for high discharge liquid, comprising a processor, a pumping unit and the optical interface device in the first embodiment.

[0097] The pumping unit is connected to the measuring cell 2 in the optical interface device, and is used to pump the high discharge liquid to the measuring cell 2. The optical interface device is used to transmit the optical signal emitted by the external light source to the high discharge liquid, and transmit the optical signal fed back by the high discharge liquid to the signal processor external to the optical device. The processor is electrically connected to the optical signal port of the optical interface device, and is used to receive the optical signal fed back by the high discharge liquid, and analyze the element content in the high discharge liquid according to the optical signal.

[0098] The high discharge liquid online measurement device can realize the online detection of the high discharge liquid by applying the optical interface device in Example 1, and can prevent the optical signal port from being contaminated by the high discharge liquid.

[0099] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An optical interface device, characterized in that: include: Housing (1) and optical fiber assembly and lens unit; The housing (1) is provided with a measuring pool (2) and a signal channel (3). The measuring pool (2) is used for high-pressure liquid to flow through. An observation port is provided through the side wall of the measuring pool (2). The signal channel (3) is connected to the observation port. The central axis of the observation port and the central axis of the signal channel (3) are on the same extended line. The optical fiber assembly comprises an optical signal port, which is installed in the signal channel (3) and faces the observation port, and is used to transmit an optical signal emitted by an external light source, so that the optical signal passes through the high discharge liquid, and transmits the optical signal fed back by the high discharge liquid to the signal processor; The lens unit is installed in the signal channel and is located between the optical signal port and the observation port, and the lens unit is used to gather the optical signal so that the optical signal passes through the observation port; A window mirror (4) is installed in the observation port to separate the interior of the measuring cell from the signal channel. The window mirror (4) is a transparent lens used to allow the optical signal to pass through and to prevent the high discharge liquid from contacting the optical signal port.

2. The optical interface device according to claim 1, characterized in that: The lens unit comprises a lens and a lens seat, wherein the lens is installed in the lens seat and is located between the optical signal port and the observation port. The lens is a convex lens, the focus of the lens is on the same extended line as the central axis of the optical signal port and the observation port, and the lens is used to focus the optical signal.

3. The optical interface device according to claim 2, characterized in that: The lens seat is cylindrical, and a smooth reflection layer is provided on the inner side wall of the lens seat. The smooth reflection layer surrounds the optical signal port and is used to gather the optical signal so that the optical signal passes through the observation port.

4. The optical interface device according to claim 3, characterized in that: There are two observation ports, namely a first observation port and a second observation port. The two observation ports are arranged opposite to each other and are respectively located on the side walls at both ends of the measuring pool (2). The window mirror (4) is installed in each observation port. The optical fiber assembly has a first structure and a second structure, and the optical fiber assembly is configured as one of the first structure and the second structure. In the first type of structure, the number of optical signal ports is two, and the two optical signal ports are respectively arranged as a signal input port and a signal output port, the signal input port and the signal output port are respectively located on both sides of the measuring cell (2) and are respectively facing the first observation port and the second observation port, the signal input port transmits an optical signal into the high discharge liquid, and the signal output port is used to transmit the optical signal fed back by the high discharge liquid out; The number of optical signal ports in the second type of structure is one, which is set as a signal transmission end. The second type of structure also includes a signal reflection end (16). The signal transmission end and the signal reflection end (16) are respectively located on both sides of the measuring cell (2) and are respectively facing the first observation port and the second observation port. The signal transmission end is used to transmit the optical signal into the high discharge liquid. The signal reflection end (16) is used to reflect the optical signal fed back by the high discharge liquid back to the signal transmission end. The signal transmission end is also used to transmit the optical signal.

5. The optical interface device according to claim 4, characterized in that: The signal channel (3) is arranged in sections, including a first accommodating section and a second accommodating section, the first accommodating section and the second accommodating section are respectively located on both sides of the measuring cell (2), the first accommodating section is connected to the first observation port, and the second accommodating section is connected to the second observation port; When the optical fiber assembly adopts the first type of structure, the signal input end is installed in the first accommodating section and faces the first observation port, and the signal output end is installed in the second accommodating section and faces the second observation port; When the optical fiber assembly adopts the second type of structure, the signal transmission end is installed in the first accommodating section and faces the first observation port, and the signal reflection end (16) is installed in the second accommodating section and faces the second observation port.

6. The optical interface device according to claim 5, characterized in that: When the optical fiber assembly adopts the first type of structure, the number of the lens units is two, namely a first lens unit and a second lens unit. The first lens unit (7) is installed in the first accommodating section and is located between the signal incident end and the first observation port, and is used to focus the optical signal input from the signal incident end so that the optical signal can pass through the first observation port. The second lens unit (8) is installed in the second accommodating section and is located between the signal output end and the second observation port, and is used to focus the optical signal fed back by the high discharge liquid so that the signal output end can transmit the optical signal.

7. The optical interface device according to claim 5, characterized in that: When the optical fiber assembly adopts the second type of structure, the number of the lens unit is one, which is set as the third lens unit. The third lens unit (11) is installed in the first accommodating section and is located between the signal transmission end and the first observation port. The third lens unit (11) is used to collect the light signal transmitted from the signal incident end and the light signal reflected back from the signal reflection end (16).

8. The optical interface device according to claim 1, characterized in that: A sealing unit (5) is provided between the window mirror (4) and the measuring cell (2), and the sealing unit (5) is used to seal the gap between the observation port and the window mirror (4).

9. The optical interface device according to claim 8, characterized in that: The thickness of the window mirror (4) extends along the central axis direction of the signal channel (3). The sealing unit (5) comprises a locking member (51) and a first sealing ring (52); the first sealing ring (52) is sleeved on one end of the window mirror (4) close to the measuring cell (2), and the first sealing ring (52) is located in the measuring cell (2); the first sealing ring (52) extends radially outwards of the window mirror (4), and its side surface is in contact with the inner wall of the measuring cell (2); the locking member (51) passes through the first sealing ring (52) and is connected to the inner wall of the measuring cell (2) for positioning the first sealing ring (52).

10. A high discharge liquid online measurement system, characterized in that: comprising a processor, a pumping unit and an optical interface device according to any one of claims 1 to 9; The pumping unit is in communication with the measuring cell (2) in the optical interface device and is used to pump high discharge liquid into the measuring cell (2); The optical interface device is used to transmit the optical signal emitted by the external light source to the high discharge liquid, and transmit the optical signal fed back by the high discharge liquid to the signal processor external to the optical interface device; The processor is electrically connected to the optical signal port of the optical interface device, and is used for receiving the optical signal fed back by the high discharge liquid, and analyzing the element content in the high discharge liquid according to the optical signal.

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