Online detection spectrum acquisition device

Abstract

The utility model provides an on-line detection spectrum acquisition device, which comprises a detection pool base, a sample injection port valve core and a liquid discharge port valve core, the detection pool base is provided with a liquid channel along the X-axis direction in a penetrating manner, the detection pool base is provided with a detection channel along the Z-axis direction in a penetrating manner, the detection channel is communicated with the liquid channel, and the liquid channel is communicated with the sample injection port valve core. The sample injection port valve core and the liquid discharge port valve core are mounted on the two sides of the interior of the liquid channel in a one-to-one correspondence manner, and the sample injection port valve core and the liquid discharge port valve core are both located at the connecting position of the liquid channel and the detection channel. And when the liquid channel is communicated with the detection channel, the detected fluid is introduced to realize on-line rapid analysis. A tedious external ball valve is replaced by a built-in valve element structure, the integration degree is high, and the size is small.

Description

Technical Field

[0001] This utility model relates to the field of online detection technology for refined oil products, and in particular to an online detection spectral acquisition device. Background Technology

[0002] Currently, the main online detection methods for mixed oil batches used in domestic refined oil pipelines rely on online densitometers, optical interface detectors (OID), and the sound velocity values ​​of ultrasonic flow meters. These three methods cannot reflect oil quality evaluation indicators such as flash point and final boiling point. Dispatchers lack intuitive understanding when cutting oil at the terminal station and often need to rely on experience to determine the timing of cutting mixed oil, making it difficult to accurately determine whether the cut oil meets standards. Literature review shows that foreign refined oil pipelines also mainly rely on online densitometers and OID to monitor and cut mixed oil, facing the same problem as domestic methods: the inability to directly monitor oil quality indicators.

[0003] Near-infrared spectroscopy is an ideal signal for qualitative and quantitative analysis of oil products. Combined with spectral analysis calibration methods, it constitutes a rapid oil quality analysis technology, widely used in refining enterprises and gasoline blending processes. It has the potential to achieve precise monitoring of pipeline interfaces for sequentially transported finished oil products and real-time analysis of oil properties. Currently, the mainstream calibration technique for this technology is biased least squares (PLS), which suffers from significant workloads in sample collection, modeling, and maintenance, representing major challenges in its application. Furthermore, analytical instruments are affected by various interference factors such as changes in ambient temperature, material temperature, and pressure. Therefore, high requirements are placed on sample pretreatment and instrument placement environment. In refineries, the compositional changes of materials monitored online are generally relatively small, resulting in relatively low modeling and maintenance workloads. The pressure of the materials being measured is not high; typically, the material is transported from the unit to the analysis cabin, where it undergoes depressurization, filtration, degassing, and isothermal treatment before its spectrum is acquired online. Unlike refinery materials, pipeline-transported refined oil products have the following characteristics: high pressure, high linear velocity (high Reynolds index), large annual temperature variations, and significant compositional differences even for the same grade of refined oil produced by different manufacturers, leading to a large workload for modeling. Therefore, online spectral detection of the properties of pipeline-transported refined oil products and blends poses serious technical challenges in areas such as multi-type oil modeling, spectral acquisition of high-pressure refined oil products, and elimination of the impact of temperature variations on model performance. To date, no practical application reports of related technologies have been found, either domestically or internationally.

[0004] Among them, the proposed design for the spectral acquisition technology of high-pressure refined oil is a flow cell suitable for high-pressure pipelines, which will enable online real-time spectral acquisition without the need for pressure reduction.

[0005] Existing online detection systems are typically designed for transmission detection cells developed for fluids under normal or low pressure conditions, providing real-time information on material composition. Traditional online detection cells use flange connections at both ends, featuring an integrated design that is difficult to maintain, lacks a sample injection interface, and has low integration. Furthermore, during contact with oil, impurities in the liquid accumulate inside the detection cell, potentially causing blockages. Cleaning requires disassembling the optical path, and reinstalling the optical path is difficult to restore, increasing the difficulty and workload of on-site maintenance. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an online detection spectral acquisition device to address the shortcomings of the existing technology.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An online detection spectral acquisition device includes: a detection cell base, a sample injection port valve core, and a drain port valve core. The detection cell base has a liquid channel extending through it along the X-axis direction, and a detection channel extending through it along the Z-axis direction. The detection channel is connected to the liquid channel. The sample injection port valve core and the drain port valve core are installed one-to-one on both sides inside the liquid channel. The sample injection port valve core and the drain port valve core are both located at the connection position between the liquid channel and the detection channel.

[0008] The beneficial effects of adopting this utility model's technical solution are: when the liquid channel and the detection channel are connected, the fluid to be detected is introduced to achieve rapid online analysis. The built-in valve core structure replaces the cumbersome external ball valve, and it boasts high integration and a small size.

[0009] Furthermore, a first valve core seal and a second valve core seal are installed on one side of the liquid channel, and a third valve core seal and a fourth valve core seal are installed on the other side of the liquid channel. The injection port valve core is located between the first valve core seal and the second valve core seal, and the drain port valve core is located between the third valve core seal and the fourth valve core seal.

[0010] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the valve core sealing body improves the sealing performance, prevents leakage, and improves the stability and reliability of the online detection spectral acquisition device.

[0011] Furthermore, both ends of the liquid channel are respectively connected by threaded connections to an inlet pipe connector for fixing the sample injection port valve core and an outlet pipe connector for fixing the drain port valve core, and the inlet pipe connector and the outlet pipe connector are installed symmetrically; the sample injection port valve core is connected to a sample injection port valve stem, and the drain port valve core is connected to a drain port valve stem, and both the sample injection port valve stem and the drain port valve stem are rotatably connected to the detection cell base through a valve stem sealing body.

[0012] The beneficial effects of adopting the above-mentioned further technical solutions are: the design of the inlet and outlet pipe joints facilitates pipe connection; and the design of the injection port valve stem and discharge port valve stem facilitates operation of the injection port valve core and discharge port valve core.

[0013] Furthermore, the detection pool base is provided with a cleaning channel extending along the Y-axis, the cleaning channel is connected to the liquid channel, and a first cleaning plug and a second cleaning plug are installed at each end of the cleaning channel.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are: when there is dirt on the surface of the detection cell window, the first cleaning plug and the second cleaning plug can be opened for cleaning. It is simple, reliable, and convenient for regular on-site maintenance.

[0015] Furthermore, a first cleaning port high-pressure sealing copper gasket and a second cleaning port high-pressure sealing copper gasket are respectively fitted onto the first cleaning plug and the second cleaning plug. A plug sealing body is fitted onto both the first cleaning plug and the second cleaning plug. The first cleaning plug and the second cleaning plug are respectively installed at both ends of the cleaning channel by threads.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the first and second cleaning plugs are threadedly connected to the base of the detection pool, and the high-pressure sealing copper gaskets of the first and second cleaning ports are locked and compacted by the first and second cleaning plugs. When there is dirt on the surface of the detection pool window, the first and second cleaning plugs can be opened for cleaning. This method is simple, reliable, and facilitates regular on-site maintenance.

[0017] Furthermore, an incident light probe and a recovery light probe are installed at each end of the detection channel.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the incident light probe and the recovery light probe facilitates the introduction of the fluid to be detected for rapid online analysis when the liquid channel is connected to the detection channel. When the liquid channel is connected to the sample injection port and the drain port, calibration or correction samples can be introduced to achieve rapid spectral acquisition.

[0019] Furthermore, the detection pool base is provided with a sample injection port and a drain port, both of which are connected to the liquid channel. The sample injection port and the drain port are located on opposite sides of the recovery photodetector. A sample injection pipe connector is threaded onto the sample injection port, and a high-pressure sealing copper gasket is installed between the sample injection pipe connector and the detection pool base. The sample injection pipe connector is connected to a sample injection pump. A drain pipe connector is threaded onto the drain port, and a high-pressure sealing copper gasket is installed between the drain pipe connector and the detection pool base. The drain pipe connector is connected to a waste liquid tank. The sample injection pipe connector and the drain pipe connector are installed symmetrically.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are: when the liquid channel is connected to the detection channel, the fluid to be detected can be introduced to achieve rapid online analysis. When the liquid channel is connected to the injection port and the drain port, calibration or correction samples can be introduced to achieve rapid spectral acquisition. It has its own injection and drain ports, eliminating the need for cumbersome ball valves and connectors, and can meet the requirements for online injection of calibration and correction samples.

[0021] Furthermore, both the incident light probe and the recovery light probe are connected to the detection channel via threads. A first probe locking ring and a second probe locking ring are installed on each of the incident light probe and the recovery light probe, respectively. The first probe locking ring and the second probe locking ring are respectively connected to the detection cell base via threads. The incident light probe and the recovery light probe have the same structure and are installed symmetrically.

[0022] The beneficial effects of adopting the above-mentioned further technical solution are: both the incident light probe and the retrieval light probe are connected to the detection channel via threads, which facilitates the installation and maintenance of the incident light probe and the retrieval light probe. The first probe locking ring and the second probe locking ring are used to lock the incident light probe and the retrieval light probe.

[0023] Furthermore, the incident light probe includes: a probe body, an optical path sleeve, an optical path straightener, an optical fiber adapter, a lens, a lens locking nut, a viewing window, and an optical fiber. The viewing window is installed at one end of the probe body. The optical path sleeve is connected to the probe body. The optical path straightener is connected to the optical path sleeve. The lens is installed on the top of the optical path straightener. The lens locking nut is installed in the optical path straightener and abuts against the lens. The optical fiber adapter is installed at the bottom of the optical path straightener. The optical fiber is connected to the optical fiber adapter and a light source is connected to the optical fiber.

[0024] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the viewing window is installed from top to bottom. When the probe is installed inside the detection pool base, the probe viewing window inside the detection pool is subjected to positive pressure from the inside out. The higher the pressure, the stronger the pressure-bearing and sealing capacity, thus achieving high-pressure sealing. The structure is simple, requiring no cumbersome locking structure, and the sealing force is achieved by the positive pressure of the fluid.

[0025] Furthermore, a window sealing body is installed between the side wall of the window and the probe body, a window bottom sealing gasket is installed between the bottom of the window and the probe body, and a first probe sealing body and a second probe sealing body are installed on the outer side of one end of the probe body.

[0026] The beneficial effects of adopting the above-mentioned further technical solution are: the installation of the window sealing body and the bottom sealing gasket of the window improves the sealing performance between the window and the probe body, preventing leakage. The installation of the first probe sealing body and the second probe sealing body facilitates the sealed connection between the probe body and the detection cell base.

[0027] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 An exploded view of the online detection spectral acquisition device provided in an embodiment of this utility model.

[0029] Figure 2 A schematic diagram of the probe provided in an embodiment of this utility model.

[0030] Figure 3 A cross-sectional view of the valve core provided for an embodiment of this utility model.

[0031] Figure 4 A cross-sectional view of the injection port and the drain port provided in an embodiment of this utility model.

[0032] Figure 5 A cross-sectional view of the cleaning port provided for an embodiment of this utility model.

[0033] Explanation of reference numerals: 1. Detection cell base; 2. Incident light probe; 3. First probe locking ring; 4. Recovery light probe; 5. Second probe locking ring; 6. First cleaning plug; 7. First cleaning port high-pressure sealing copper gasket; 8. Second cleaning plug; 9. Second cleaning port high-pressure sealing copper gasket; 10. Sample injection tube connector; 11. Sample injection high-pressure sealing copper gasket; 12. Drain pipe connector; 13. Drain high-pressure sealing copper gasket; 14. Inlet pipe connector; 15. First valve core sealing body; 16. Sample injection port valve core; 17. Second valve core 18. Seal body; 19. Outlet pipe connector; 20. Third valve core seal body; 21. Drain valve core; 22. Fourth valve core seal body; 23. Injection port valve stem; 24. Drain valve stem; 201. Probe body; 202. Optical path sleeve; 203. Optical path straightener; 204. Fiber optic adapter; 205. Lens; 206. Lens lock nut; 207. Viewing window; 208. Viewing window seal body; 209. Bottom sealing gasket of viewing window; 210. First probe seal body; 211. Second probe seal body; 212. Fiber optic cable. Detailed Implementation

[0034] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0035] like Figures 1 to 5 As shown in the figure, this utility model embodiment provides an online detection spectral acquisition device, including: a detection cell base 1, a sample injection port valve core 16, and a drain port valve core 20. The detection cell base 1 has a liquid channel extending through it along the X-axis direction, and a detection channel extending through it along the Z-axis direction. The detection channel is connected to the liquid channel. The sample injection port valve core 16 and the drain port valve core 20 are installed one-to-one on both sides of the inside of the liquid channel. The sample injection port valve core 16 and the drain port valve core 20 are both located at the connection position between the liquid channel and the detection channel.

[0036] The beneficial effects of adopting this utility model's technical solution are: when the liquid channel and the detection channel are connected, the fluid to be detected is introduced to achieve rapid online analysis. The built-in valve core structure replaces the cumbersome external ball valve, and it boasts high integration and a small size.

[0037] This utility model provides an online detection spectral acquisition device, which can be a high-pressure near-infrared spectral online detection cell. Compared with the prior art, the high-pressure sealing structure is simple, requiring no excessive pressure-bearing sealing parts. The viewing window is installed from the inside out, and the fluid pressure exerts force on the viewing window to achieve a sealing effect. It has a built-in cleaning port, which facilitates wiping and blowing the viewing window with tools to ensure signal accuracy. It also has a built-in sample injection port and a drain port, eliminating the need for cumbersome ball valves and connectors, and can meet the requirements for online injection of calibration samples and correction samples. This online detection cell (online detection spectral acquisition device) is small in size, highly integrated, and easy to install on site.

[0038] like Figures 1 to 5 As shown, further, a first valve core seal 15 and a second valve core seal 17 are installed on one side of the liquid channel, and a third valve core seal 19 and a fourth valve core seal 21 are installed on the other side of the liquid channel. The injection port valve core 16 is located between the first valve core seal 15 and the second valve core seal 17, and the drain port valve core 20 is located between the third valve core seal 19 and the fourth valve core seal 21.

[0039] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the valve core sealing body improves the sealing performance, prevents leakage, and improves the stability and reliability of the online detection spectral acquisition device.

[0040] like Figures 1 to 5 As shown, further, the two ends of the liquid channel are respectively connected by a liquid inlet pipe joint 14 for fixing the sample injection port valve core 16 and a liquid outlet pipe joint 18 for fixing the liquid outlet valve core 20. The liquid inlet pipe joint 14 and the liquid outlet pipe joint 18 are installed symmetrically. The sample injection port valve core 16 is connected to a sample injection port valve stem 22, and the liquid outlet valve core 20 is connected to a liquid outlet valve stem 23. The sample injection port valve stem 22 and the liquid outlet valve stem 23 are both rotatably connected to the detection pool base 1 through a valve stem sealing body.

[0041] The beneficial effects of adopting the above-mentioned further technical solutions are: the design of the inlet and outlet pipe joints facilitates pipe connection; and the design of the injection port valve stem and discharge port valve stem facilitates operation of the injection port valve core and discharge port valve core.

[0042] like Figures 1 to 5 As shown, the detection pool base 1 is further provided with a cleaning channel through it along the Y-axis. The cleaning channel is connected to the liquid channel. A first cleaning plug 6 and a second cleaning plug 8 are installed at each end of the cleaning channel.

[0043] The beneficial effects of adopting the above-mentioned further technical solution are: when there is dirt on the surface of the detection cell window, the first cleaning plug and the second cleaning plug can be opened for cleaning. It is simple, reliable, and convenient for regular on-site maintenance.

[0044] The cleaning channel and the testing channel are vertically connected.

[0045] like Figures 1 to 5 As shown, the first cleaning plug 6 and the second cleaning plug 8 are respectively fitted with a first cleaning port high-pressure sealing copper gasket 7 and a second cleaning port high-pressure sealing copper gasket 9. Both the first cleaning plug 6 and the second cleaning plug 8 are fitted with plug sealing bodies. The first cleaning plug 6 and the second cleaning plug 8 are respectively installed at both ends of the cleaning channel by threads.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the first and second cleaning plugs are threadedly connected to the base of the detection pool, and the high-pressure sealing copper gaskets of the first and second cleaning ports are locked and compacted by the first and second cleaning plugs. When there is dirt on the surface of the detection pool window, the first and second cleaning plugs can be opened for cleaning. This method is simple, reliable, and facilitates regular on-site maintenance.

[0047] This facilitates the implementation of online self-cleaning technology for the high-pressure monitoring flow cell, enabling continuous operation of the online spectral monitoring system.

[0048] like Figures 1 to 5 As shown, further, an incident light probe 2 and a recovery light probe 4 are installed at each end of the detection channel.

[0049] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of the incident light probe and the recovery light probe facilitates the introduction of the fluid to be detected for rapid online analysis when the liquid channel is connected to the detection channel. When the liquid channel is connected to the sample injection port and the drain port, calibration or correction samples can be introduced to achieve rapid spectral acquisition.

[0050] like Figures 1 to 5As shown, the detection pool base 1 is further provided with a sample injection port and a drain port, both of which are connected to the liquid channel. The sample injection port and the drain port are located on opposite sides of the recovery photodetector 4. A sample injection pipe connector 10 is threaded onto the sample injection port, and a high-pressure sealing copper gasket 11 is installed between the sample injection pipe connector 10 and the detection pool base 1. The sample injection pipe connector 10 is connected to a sample injection pump. A drain pipe connector 12 is threaded onto the drain port, and a high-pressure sealing copper gasket 13 is installed between the drain pipe connector 12 and the detection pool base 1. The drain pipe connector 12 is connected to a waste liquid tank. The sample injection pipe connector 10 and the drain pipe connector 12 are installed symmetrically.

[0051] The beneficial effects of adopting the above-mentioned further technical solution are: when the liquid channel is connected to the detection channel, the fluid to be detected can be introduced to achieve rapid online analysis. When the liquid channel is connected to the injection port and the drain port, calibration or correction samples can be introduced to achieve rapid spectral acquisition. It has its own injection and drain ports, eliminating the need for cumbersome ball valves and connectors, and can meet the requirements for online injection of calibration and correction samples.

[0052] The injection port and the drain port are both connected to the liquid channel. The injection port corresponds to the injection port valve core 16, and the drain port corresponds to the drain port valve core 20.

[0053] like Figures 1 to 5 As shown, further, both the incident light probe 2 and the recovery light probe 4 are connected to the detection channel via threads. A first probe locking ring 3 and a second probe locking ring 5 are installed on the incident light probe 2 and the recovery light probe 4 respectively. The first probe locking ring 3 and the second probe locking ring 5 are respectively connected to the detection pool base 1 via threads. The incident light probe 2 and the recovery light probe 4 have the same structure and are installed symmetrically.

[0054] The beneficial effects of adopting the above-mentioned further technical solution are: both the incident light probe and the retrieval light probe are connected to the detection channel via threads, which facilitates the installation and maintenance of the incident light probe and the retrieval light probe. The first probe locking ring and the second probe locking ring are used to lock the incident light probe and the retrieval light probe.

[0055] like Figures 1 to 5As shown, the incident light probe 2 further includes: a probe body 201, an optical path sleeve 202, an optical path straightener 203, an optical fiber adapter 204, a lens 205, a lens lock nut 206, a viewing window 207, and an optical fiber 212. The viewing window 207 is installed at one end of the probe body 201. The optical path sleeve 202 is connected to the probe body 201. The optical path straightener 203 is connected to the optical path sleeve 202. The lens 205 is installed at the top of the optical path straightener 203. The lens lock nut 206 is installed in the optical path straightener 203 and abuts against the lens 205. The optical fiber adapter 204 is installed at the bottom of the optical path straightener 203. The optical fiber 212 is connected to the optical fiber adapter 204 and is connected to a light source.

[0056] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the viewing window is installed from top to bottom. When the probe is installed inside the detection pool base, the probe viewing window inside the detection pool is subjected to positive pressure from the inside out. The higher the pressure, the stronger the pressure-bearing and sealing capacity, thus achieving high-pressure sealing. The structure is simple, requiring no cumbersome locking structure, and the sealing force is achieved by the positive pressure of the fluid.

[0057] like Figures 1 to 5 As shown, further, a window sealing body 208 is installed between the side wall of the window 207 and the probe body 201, a window bottom sealing gasket 209 is installed between the bottom of the window 207 and the probe body 201, and a first probe sealing body 210 and a second probe sealing body 211 are installed on the outer side of one end of the probe body 201.

[0058] The beneficial effects of adopting the above-mentioned further technical solution are: the installation of the window sealing body and the bottom sealing gasket of the window improves the sealing performance between the window and the probe body, preventing leakage. The installation of the first probe sealing body and the second probe sealing body facilitates the sealed connection between the probe body and the detection cell base.

[0059] This utility model provides an online detection spectral acquisition device, which can be a high-pressure near-infrared spectral online detection cell, including: a detection cell base 1, a liquid channel penetrating through the middle X-axis position of the detection cell base 1, slots at both ends of the liquid channel, valve core sealing bodies (first valve core sealing body 15, second valve core sealing body 17, third valve core sealing body 19, and fourth valve core sealing body 21) installed in the slots, valve cores (sample injection port valve core 16 and drain port valve core 20) located in the middle of the valve core sealing bodies (first valve core sealing body 15, second valve core sealing body 17, third valve core sealing body 19, and fourth valve core sealing body 21), a liquid inlet pipe connector 14 threadedly connected to the detection cell base 1 to fix the sample injection port valve core 16, a sample injection port valve stem 22 located above the sample injection port valve core 16, a valve stem sealing body located in the slot of the valve stem (sample injection port valve stem 22 and drain port valve stem 23), and a liquid outlet pipe connector 18 and a drain valve core (drain port valve core 20) symmetrically installed. This method can replace cumbersome external ball valves and has a high degree of integration and small size.

[0060] A cleaning port (both ends of the cleaning channel) is provided through the Y-axis position of the detection pool base 1. The cleaning plugs (first cleaning plug 6 and second cleaning plug 8) are threadedly connected to the detection pool base 1. The high-pressure sealing copper gaskets of the cleaning port (first cleaning port high-pressure sealing copper gasket 7 and second cleaning port high-pressure sealing copper gasket 9) are locked and compacted by the plugs (first cleaning plug 6 and second cleaning plug 8). The sealing body of the plug is located in the slot of the plug cylinder.

[0061] When there is dirt on the surface of the test tank window, the cleaning plugs (first cleaning plug 6 and second cleaning plug 8) can be opened to thoroughly wipe and clean the impurities adhering to the surface of the window. Alternatively, air blowers can be used for cleaning. This method is simple, reliable, and convenient for regular on-site maintenance.

[0062] The Z-axis of the detection pool base 1 is provided with a circular detection channel. The incident light probe 2 is threadedly connected to the detection hole (both ends of the detection channel). The probe locking ring (first probe locking ring 3 and second probe locking ring 5) is located at the rear end of the incident light probe 2 and is threadedly connected to the detection pool base 1. The recovery light probe 4 has the same structure as the incident light probe 2 and is symmetrically installed. The left end of the recovery light probe 4 of the detection pool base 1 is provided with a sample injection port, which is connected to the valve core (sample injection port valve core 16). The sample injection tube connector 10 is threadedly connected to the detection pool base 1. The high-pressure sealing copper gasket 11 is located between the sample injection tube connector 10 and the detection pool base 1. The drain port is located on the right side of the recovery light probe 4 and is connected to the drain port valve core 20. The structure of the drain port is the same as that of the sample injection port. The drain tube connector 12 is symmetrically installed with the sample injection tube connector 10.

[0063] The incident light probe 2 and the recovered light probe 4 have the same structure, including: a probe body 201 with a through circular hole in the middle, a viewing window 207 located at the front end of the probe body 201, a viewing window sealing body 208 located in the inner groove of the front end of the probe, a bottom sealing gasket 209 located at the lower end of the viewing window 207, and an optical path sleeve 202 threadedly connected to the lower end of the probe body 201; an optical path straightener 203 threadedly connected to the optical path sleeve 202, a lens 205 located at the upper end of the optical path straightener 203, a lens locking nut 206 threadedly fixed above the optical path straightener 203 to press the lens 205, an optical fiber adapter 204 inserted into the lower end of the optical path straightener 203 and fixed and locked by a side set screw, and an optical fiber 212 threadedly connected to the optical fiber adapter 204; a groove is provided on the outer side of the front end of the probe to install the probe sealing body (first probe sealing body 210 and second probe sealing body 211), and a thread is provided on the outer wall of the probe to fix the probe.

[0064] The viewing window 207 is installed from top to bottom. When the probe is installed inside the detection pool base 1, the probe viewing window inside the detection pool is subjected to positive pressure from the inside out. The higher the pressure, the stronger the pressure-bearing and sealing capacity, thus achieving high-pressure sealing. This method has a simple structure, does not require a complicated locking structure, and uses fluid positive pressure for sealing.

[0065] The present invention provides an online detection spectral acquisition device, which can be a high-pressure near-infrared spectral online detection cell. The main working principle is that the inlet pipe connector 14 and the outlet pipe connector 18 are connected to the online pipeline (detection channel), the optical fiber 212 of the incident light probe 2 is connected to the light source, the optical fiber of the recovery light probe 4 is connected to the spectrometer, the sample injection port is connected to the sample injection pump, and the drain port is connected to the waste liquid tank.

[0066] Rotate the injection port valve stem 22 and the drain port valve stem 23. When the liquid channel is connected to the online pipeline (detection channel), the fluid to be detected is introduced to achieve rapid online analysis. When the liquid channel is connected to the injection port and the drain port, calibration or correction samples can be introduced to achieve rapid spectral acquisition. The probe window inside the detection cell is subjected to positive pressure from the inside out. The higher the pressure, the stronger the pressure-bearing and sealing ability, thus achieving high-pressure sealing. When there is dirt on the surface of the detection cell window, the cleaning plugs (first cleaning plug 6 and second cleaning plug 8) can be opened for manual cleaning.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An online detection spectrograph, characterized in that, The application relates to a detection pool base, a sample injection port valve core and a liquid discharge port valve core, wherein a liquid channel is formed through the detection pool base along an X-axis direction, a detection channel is formed through the detection pool base along a Z-axis direction, the detection channel is communicated with the liquid channel, the sample injection port valve core and the liquid discharge port valve core are correspondingly installed on the two sides of the liquid channel, and the sample injection port valve core and the liquid discharge port valve core are located at the connection position of the liquid channel and the detection channel. A first valve core sealing body and a second valve core sealing body are installed on one side of the liquid channel, a third valve core sealing body and a fourth valve core sealing body are installed on the other side of the liquid channel, the sample injection port valve core is located between the first valve core sealing body and the second valve core sealing body, and the liquid discharge port valve core is located between the third valve core sealing body and the fourth valve core sealing body.

2. The on-line detection spectrum acquisition device according to claim 1, characterized in that, Liquid inlet pipe joints for fixing the sample injection port valve core and liquid outlet pipe joints for fixing the liquid discharge port valve core are symmetrically installed at the two ends of the liquid channel through thread connection, the sample injection port valve core is connected with a sample injection port valve rod, the liquid discharge port valve core is connected with a liquid discharge port valve rod, and the sample injection port valve rod and the liquid discharge port valve rod are rotationally connected with the detection pool base through valve rod sealing bodies.

3. The on-line detection spectrum acquisition device according to claim 1, characterized in that, A cleaning channel is formed through the detection pool base along a Y-axis direction, the cleaning channel is communicated with the liquid channel, and a first cleaning plug and a second cleaning plug are correspondingly installed at the two ends of the cleaning channel.

4. The on-line detection spectrum acquisition device according to claim 1, characterized in that, First cleaning port high-pressure sealing copper pads and second cleaning port high-pressure sealing copper pads are correspondingly sleeved on the first cleaning plug and the second cleaning plug, plug sealing bodies are sleeved on the first cleaning plug and the second cleaning plug, and the first cleaning plug and the second cleaning plug are correspondingly installed at the two ends of the cleaning channel through thread connection.

5. The on-line detection spectrum acquisition device according to claim 4, characterized in that, An incident light probe and a recovered light probe are correspondingly installed at the two ends of the detection channel.

6. The on-line detection spectrum acquisition device according to claim 1, characterized in that, A sample injection port and a liquid discharge port are formed in the detection pool base, the sample injection port and the liquid discharge port are communicated with the liquid channel, the sample injection port and the liquid discharge port are correspondingly located on the two sides of the recovered light probe, a sample injection pipe joint is threadedly installed on the sample injection port, a sample injection high-pressure sealing copper pad is installed between the sample injection pipe joint and the detection pool base, and the sample injection pipe joint is connected with a sample injection pump; a liquid discharge pipe joint is threadedly installed on the liquid discharge port, a liquid discharge high-pressure sealing copper pad is installed between the liquid discharge pipe joint and the detection pool base, the liquid discharge pipe joint is connected with a waste liquid barrel, and the sample injection pipe joint and the liquid discharge pipe joint are symmetrically installed.

7. The on-line detection spectrum acquisition device according to claim 6, characterized in that, The incident light probe and the recovered light probe are connected with the detection channel through thread connection, first probe locking rings and second probe locking rings are correspondingly installed on the incident light probe and the recovered light probe, the first probe locking rings and the second probe locking rings are respectively connected with the detection pool base through thread connection, and the incident light probe and the recovered light probe are the same in structure and are symmetrically installed.

8. The on-line detection spectrum acquisition device according to claim 6, characterized in that, ​ 9. The on-line detection spectrum acquisition device according to claim 6, characterized in that, The incident light probe comprises a probe body, a light path sleeve, a light path straightener, a fiber adapter, a lens, a lens lock nut, a window, and a fiber, the window is installed at one end of the probe body, the light path sleeve is connected with the probe body, the light path straightener is connected with the light path sleeve, the lens is installed at the top of the light path straightener, the lens lock nut is installed in the light path straightener and abuts against the lens, the fiber adapter is installed at the bottom of the light path straightener, the fiber is connected with the fiber adapter, and the fiber is connected with a light source.

10. The on-line detection spectrum acquisition device according to claim 9, characterized in that, A window sealing body is installed between the side wall of the window and the probe body, a window bottom sealing gasket is installed between the bottom of the window and the probe body, and a first probe sealing body and a second probe sealing body are installed outside one end of the probe body.

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