Multi-channel water quality COD (Chemical Oxygen Demand) detection device for deep ground environment development

Abstract

The utility model relates to a multi-channel water quality COD (Chemical Oxygen Demand) detection device for deep ground environment development, which comprises a bunching wire, a plurality of water quality COD detection devices and a plurality of water quality COD detection devices, wherein the bunching wire comprises a steel wire main body and a plurality of wire harnesses arranged in the steel wire main body; the probe is connected with one end of the cluster wire and comprises a detection shell and an absorption cell arranged in the detection shell, a to-be-detected water body enters the absorption cell through the detection shell, a light incident port and a light emergent port are formed in the top of the probe, and a reflection assembly is arranged in the absorption cell; light entering the absorption cell from the light entrance port is reflected by the reflection assembly and is emitted from the light exit port; the operation terminal is connected with the other end of the bunching wire and is used for emitting detection light rays into the light incident port through the wire harness and analyzing spectral information of light rays reflected back by the light emergent port through the wire harness; and the buoy is sleeved on the cluster wire to enable the probe to suspend in the water body, so that the multi-channel water quality COD detection device is provided, and the problems of secondary pollution and insufficient real-time performance and regionality existing in the detection of water quality COD by the existing related device are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality COD detection, in particular to a multi-channel water quality COD detection device for deep earth environment development. Background Art

[0002] In the development of deep-earth environments, accurate monitoring of water quality is crucial. Chemical oxygen demand (COD), as an important indicator for measuring the concentration of organic matter and some oxidizing inorganic pollutants in water bodies, plays a central role in detecting the degree of organic pollution in deep-earth water bodies. Common methods for testing COD in water quality include the dichromate method, potassium permanganate method, spectrophotometry, and ultraviolet-visible absorption spectroscopy, each of which has its own advantages and disadvantages. The dichromate method and potassium permanganate method are chemical analysis methods. These methods have high oxidation rates and are accurate and reliable, but they consume large amounts of chemical reagents and cause certain environmental pollution. Both spectrophotometry and ultraviolet-visible absorption spectroscopy are used to measure the intensity or absorption of light in a sample. The difference is that ultraviolet-visible absorption spectroscopy does not destroy the sample, allowing for non-destructive testing.

[0003] At present, most traditional water quality COD detection instruments require the collection of water samples and then testing in the laboratory. This method cannot present the dynamic concentration changes of COD in a certain area of ​​water quality in real time. In view of this, a multi-channel water quality COD detection device for deep-earth environment development came into being. The device is extremely portable and can carry out continuous detection of COD concentration and water temperature at different locations and depths of water quality in a certain area of ​​the deep earth. It is easy to operate and the measured data can be displayed in real time, providing an efficient and convenient solution for water quality testing during deep-earth environment development, effectively ensuring the smooth development of deep-earth environment development activities and environmental safety. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a multi-channel water quality COD detection device for deep earth environment development, which solves the problems of secondary pollution, lack of real-time and regional detection of water quality COD by existing related devices.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] A multi-channel water quality COD detection device for deep earth environment development, comprising:

[0007] A bundled wire comprising a steel wire body and a plurality of wire bundles arranged in the steel wire body;

[0008] A probe is connected with one end of the cluster line and is used for being placed underwater, and the probe comprises a detection shell and an absorption pool arranged in the detection shell, a water body to be detected enters the absorption pool through the detection shell, a light entrance and a light exit are arranged on the top of the probe, a reflection assembly is arranged in the absorption pool, and light entering the absorption pool through the light entrance is emitted from the light exit through the reflection of the reflection assembly.

[0009] An operation terminal is connected with the other end of the cluster line, and is used for emitting detection light into the light entrance through the cluster line and analyzing spectral information of light reflected back to the light exit through the cluster line.

[0010] A float is sleeved on the cluster line and is used for suspending the probe in the water body.

[0011] As an embodiment of the utility model, a water passing hole is arranged on the detection shell, a water passing groove is arranged on the absorption pool, and a gap is arranged between the detection shell and the absorption pool, and the water body to be detected enters the absorption pool through the water passing hole, the gap and the water passing groove in sequence.

[0012] The penetrating direction of the water passing hole is staggered with the penetrating direction of the water passing groove, so as to reduce the light in the water body environment from entering the absorption pool.

[0013] As an embodiment of the utility model, a plurality of water passing holes are vertically arranged on the detection shell, and the water passing groove is vertically arranged on the absorption pool, and the penetrating direction of the water passing hole is perpendicular to the penetrating direction of the water passing groove.

[0014] As an embodiment of the utility model, the detection shell is in a cylindrical shape, and comprises a shell body and a probe upper cover which is threadedly connected to the upper end of the shell body, a connecting boss is arranged on the probe upper cover, an end of the steel wire body is provided with a connecting cap, and the connecting cap is connected with the connecting boss.

[0015] The absorption pool is in a cylindrical shape, a fixed stud is arranged on the bottom of the absorption pool, a stud through hole is arranged on the bottom of the shell body and corresponds to the fixed stud, and a nut assembly is sleeved on the fixed stud after the fixed stud passes through the stud through hole, and the absorption pool is fixedly installed in the shell body by screwing the nut assembly.

[0016] As an embodiment of the utility model, the top of the probe upper cover is provided with a threaded hole-shaped light entrance and a threaded hole-shaped light exit, and a fiber connector is threadedly connected to the light entrance and the light exit.

[0017] The bundle line comprises an incident optical fiber and an exit optical fiber, the incident optical fiber is connected with the optical fiber connector on the light incident port, and the exit optical fiber is connected with the optical fiber connector on the light exit port.

[0018] As an embodiment of the utility model, the top of the absorption cell is provided with an incident filter corresponding to the light incident port, and the top of the absorption cell is provided with an exit filter corresponding to the light exit port, the light entering the light incident port passes through the incident filter and enters the absorption cell, and then is reflected by the reflection assembly and exits the light exit port from the exit filter.

[0019] As an embodiment of the utility model, the lower part of the absorption cell is provided with a sealing filter, a water cavity is formed between the sealing filter and the bottom of the absorption cell, the reflection assembly comprises a probe first mirror and a probe second mirror arranged in the water cavity, the probe first mirror and the probe second mirror are inclined and mirror image arranged, the probe first mirror is arranged below the incident filter, and the probe second mirror is arranged below the exit filter.

[0020] As an embodiment of the utility model, the bundle line further comprises a temperature data line connected with the operation terminal, the top of the absorption cell is provided with a temperature sensor, the connecting cap is provided with a wire harness via hole opposite to the connecting boss, the temperature data line is connected with the temperature sensor after passing through the wire harness via hole, and is used for collecting water temperature information of the absorption cell into the operation terminal.

[0021] As an embodiment of the utility model, the operation terminal comprises a precision optical mechanical mechanism, an information processing module, a laser and a display, and at least one bundle line is connected to the operation terminal.

[0022] The precision optical mechanical mechanism comprises a six-channel optical fiber interface wheel and an optical reflection wheel arranged opposite to each other, the laser is arranged between the six-channel optical fiber interface wheel and the optical reflection wheel, six groups of optical fiber interfaces are uniformly arranged on the six-channel optical fiber interface wheel in a circumferential direction, the incident optical fiber of the bundle line is connected with the optical fiber interface on the six-channel optical fiber interface wheel through an optical fiber beam splitter, and the precision optical mechanical mechanism is used for reflecting the light beam emitted by the laser into any optical fiber interface.

[0023] The information processing module includes a mainboard, an acquisition card connected to the mainboard wiring harness, a first spectrometer connected to the acquisition card wiring harness, a second spectrometer connected to the acquisition card wiring harness, a first fiber optic combiner connected to the first spectrometer wiring harness, and a second fiber optic combiner connected to the second spectrometer wiring harness. The display is connected to the mainboard, the first fiber optic combiner is connected to the fiber optic splitter through a reference fiber, the second fiber optic combiner is connected to the output fiber, and the temperature data line is connected to the acquisition card.

[0024] As an embodiment of the present utility model, the light reflection wheel includes a second annular aluminum disk, six groups of reflectors uniformly arranged circumferentially on the second annular aluminum disk, a rotating reflector rotatably arranged at the center of the second annular aluminum disk, and a servo motor for driving the rotating reflector to rotate, wherein the reflector corresponds to the optical fiber interface;

[0025] The light beam emitted by the laser is reflected by the rotating reflector onto the reflector, and then reflected by the reflector into the optical fiber interface;

[0026] The servo motor drives the rotating reflective mirror to rotate so as to reflect the light beam emitted by the laser onto different reflective mirrors.

[0027] The beneficial effects of adopting the above technical solution are:

[0028] 1. The detection device of this utility model uses a precise optical mechanical mechanism and a laser to realize six channels sharing, so as to realize simultaneous detection of different water areas, different positions of the same water area and different depths, thereby improving the efficiency of water quality COD detection.

[0029] 2. The detection device of the utility model detects the COD concentration of water quality based on ultraviolet-visible absorption spectroscopy, which will not produce secondary pollutants and can realize non-destructive detection.

[0030] 3. The detection device of the utility model has a simple structure and is easy to carry. It can be used for outdoor water area detection. The probe is directly immersed in the water, and the data information is pre-processed by the mainboard and directly displayed on the display. The operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of this embodiment.

[0032] Figure 2 Schematic diagram of the structure of the probe of this embodiment.

[0033] Figure 3 Schematic diagram of the internal structure of the probe of this embodiment.

[0034] Figure 4Schematic diagram of the structure of the bundled wire end of this embodiment.

[0035] Figure 5 Schematic diagram of the structure of the precision optical mechanical mechanism and laser of this embodiment.

[0036] Figure 6 yes Figure 5 Schematic diagram of the structure from another angle.

[0037] Wherein: 1. Probe; 2. Float; 3. Beam line; 4. Fiber splitter; 5. Reference fiber; 6. Six-channel fiber interface wheel; 7. Laser; 8. Light reflection wheel; 9. First fiber combiner; 10. First spectrometer; 11. Display; 12. Capture card; 13. Mainboard; 14. Second spectrometer; 15. Second fiber combiner;

[0038] 301, incident optical fiber; 302, temperature data line; 303, output optical fiber; 304, steel wire body; 305, connection cap; 306, optical fiber connector;

[0039] 101. Water channel; 102. Water hole; 103. Incident filter; 104. Light inlet; 105. Light outlet; 106. Exit filter; 107. Temperature sensor; 108. Fixing stud; 109. Absorption cell; 110. Probe housing; 111. Sealing filter; 112. Probe second reflector; 113. Probe first reflector; 114 Connecting boss; 115 Probe cover; 116 Housing;

[0040] 601, optical fiber interface; 602, first annular aluminum plate;

[0041] 801. Rotating reflector; 802. Servo motor; 803. Second annular aluminum disk; 804. Reflector. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described clearly and completely below in conjunction with specific embodiments.

[0043] like Figures 1 to 5 The multi-channel water quality COD detection device for deep earth environment development shown in FIG includes:

[0044] The bundled wire 3 includes a steel wire body 304 and a plurality of wire bundles arranged in the steel wire body 304;

[0045] The probe 1 is connected to one end of the cluster line 3 and is used to be placed underwater. It includes a detection housing 100 and an absorption pool 109 disposed in the detection housing 100. The water to be measured enters the absorption pool 109 through the detection housing 100. The top of the probe 1 is provided with a light input port 104 and a light output port 105. The absorption pool 109 is provided with a reflective component. The light emitted from the light input port 104 into the absorption pool 109 is reflected by the reflective component and emitted from the light output port 105.

[0046] Operator terminal, see Figure 1 , which is connected to the other end of the bunching line 3 and is used to emit detection light into the light incident port 104 through the bundle and analyze the spectral information of the light reflected back from the light outlet 105 through the bundle;

[0047] The float 2 is mounted on the bundle line 3 and is used to suspend the probe 1 in the water.

[0048] See also Figure 2 and Figure 3 The detection housing 100 is provided with a water hole 102, and the absorption pool 109 is provided with a water groove 101. A gap is provided between the detection housing 100 and the absorption pool 109. The water to be measured passes through the water hole 102, the gap and the water groove 101 in sequence and then enters the absorption pool 109;

[0049] The direction of penetration of the water holes 102 intersects with the direction of penetration of the water troughs 101, thereby reducing the amount of light from the water environment entering the absorption pool 109. This reduces detection errors and increases detection accuracy. Preferably, in this embodiment, the detection housing 100 is vertically provided with a plurality of water holes 102, and the water troughs 101 are vertically provided on the absorption pool 109. The penetration direction of the water holes 102 is perpendicular to the penetration direction of the water troughs 101.

[0050] See also Figure 3 The detection shell 100 is cylindrical as a whole, and includes a shell body 117 and a probe cover 116 threadedly connected to the upper end of the shell body 117. The probe cover 116 is provided with a connecting boss 114, and the end of the steel wire body 304 is provided with a connecting cap 305, and the connecting cap 305 is connected to the connecting boss 114. Preferably, a threaded structure is provided on the connecting boss 114, and a threaded structure is provided on the inner side of the connecting cap 305, and the two are threadedly connected.

[0051] See also Figure 3The absorption pool 109 is in a cylindrical shape as a whole, and a fixing stud 108 is arranged at the bottom of the absorption pool 109. A stud through hole is formed at the bottom of the shell body 117 corresponding to the fixing stud 108. The fixing stud 108 is sleeved with a nut assembly after passing through the stud through hole. The absorption pool 109 is fixedly installed in the shell body 117 by screwing the nut assembly.

[0052] In combination Figure 3 And Figure 4 The top of the probe upper cover 116 is provided with a threaded hole-shaped light entrance port 104 and a threaded hole-shaped light exit port 105. The light entrance port 104 and the light exit port 105 are both threadedly connected with a fiber connector 306. The bundle line 3 includes an entrance fiber 301 and an exit fiber 303. The entrance fiber 301 is connected with the fiber connector 306 on the light entrance port 104, and the exit fiber 303 is connected with the fiber connector 306 on the light exit port 105.

[0053] Referring to Figure 3 The top of the absorption pool 109 is provided with an entrance filter 103 corresponding to the light entrance port 104. The top of the absorption pool 109 is provided with an exit filter 106 corresponding to the light exit port 105. The light entering the light entrance port 104 enters the absorption pool 109 through the entrance filter 103, and is reflected by the reflection assembly and then exits the light exit port 105 from the exit filter 106. A sealing filter 111 is arranged at the lower part of the absorption pool 109. A water separation cavity is formed between the sealing filter 111 and the bottom of the absorption pool 109, which is used to avoid direct contact between the reflection assembly and the water body and reduce pollution to the reflection assembly. The reflection assembly includes a probe first mirror 113 and a probe second mirror 112 arranged in the water separation cavity. The probe first mirror 113 and the probe second mirror 112 are inclined and mirror-imaged. The probe first mirror 113 is arranged below the entrance filter 103, and the probe second mirror 112 is arranged below the exit filter 106.

[0054] Referring to Figure 4 The bundle line 3 further includes a temperature data line 302 connected with the operation terminal. A temperature sensor 107 is arranged at the top of the absorption pool 109. The connecting cap 305 is provided with a wire bundle through hole opposite to the connecting boss 114. The temperature data line 302 is connected with the temperature sensor 107 after passing through the wire bundle through hole, and is used to collect water temperature information of the absorption pool 109 into the operation terminal.

[0055] Referring to Figure 1The operation terminal includes a precision optical mechanical mechanism, an information processing module, a laser 7 and a display 11, and the operation terminal is connected to at least one of the beam lines 3;

[0056] The precision optical mechanical mechanism comprises a six-channel optical fiber interface wheel 6 and a light reflection wheel 8 arranged relative to each other, the laser 7 being arranged between the six-channel optical fiber interface wheel 6 and the light reflection wheel 8, six groups of optical fiber interfaces 601 being evenly arranged circumferentially on the six-channel optical fiber interface wheel 6, the incident optical fiber 301 of the bunching line 3 being connected to the optical fiber interface 601 on the six-channel optical fiber interface wheel 6 via a fiber beam splitter 4, and the precision optical mechanical mechanism being used to reflect the light beam emitted by the laser 7 into any of the optical fiber interfaces 601;

[0057] The information processing module includes a mainboard 13, an acquisition card 12 connected to the mainboard 13 by a wiring harness, a first spectrometer 10 connected to the acquisition card 12 by a wiring harness, a second spectrometer 14 connected to the acquisition card 12 by a wiring harness, a first fiber combiner 9 connected to the first spectrometer 10 by a wiring harness, and a second fiber combiner 15 connected to the second spectrometer 14 by a wiring harness. The display 11 is connected to the mainboard 13, the first fiber combiner 9 is connected to the fiber splitter 4 via a reference fiber 5, the second fiber combiner 15 is connected to the output fiber 303, and the temperature data line 302 is connected to the acquisition card 12.

[0058] See also Figure 1 、 Figure 5 and Figure 6 The light reflection wheel 8 includes a second annular aluminum disk 803, six groups of reflectors 804 uniformly arranged on the second annular aluminum disk 803, a rotating reflector 801 rotatably arranged at the center of the second annular aluminum disk 803, and a servo motor 802 for driving the rotating reflector 801 to rotate. The reflector 804 corresponds to the optical fiber interface 601.

[0059] The light beam emitted by the laser 7 is reflected by the rotating reflector 801 to the reflector 804, and then reflected by the reflector 804 to the optical fiber interface 601;

[0060] The servo motor 802 drives the rotating reflector 801 to rotate so as to reflect the light beam emitted by the laser 7 onto different reflectors 804 .

[0061] An operation step and detailed explanation of this embodiment are as follows:

[0062] The multi-channel water quality COD detection device for deep earth environment development uses only one channel, that is, only one probe 1 is required.

[0063] First, probe 1 is exposed to clean air and connected to any fiber optic interface 601 using a beam line 3. When the power is turned on, laser 7 is illuminated, servo motor 802 rotates, and a light beam is emitted from the laser to rotating mirror 801. The beam is reflected 90 degrees and changes with the surface of rotating mirror 801 until it passes through rotating mirror 801 and reaches reflector 804. The light beam then reflects perpendicularly into fiber optic interface 601 and is unevenly distributed by fiber optic beam splitter 4 to reference fiber 5 and incident fiber 301, with an energy ratio of 1:9. The light beam passing through reference fiber 5 passes through first fiber combiner 9 and reaches first spectrometer 10. The light intensity information from first spectrometer 10 is pre-processed by acquisition card 12 and transmitted to mainboard 13. This information is recorded as spectral reference information and can be used to monitor the stability of the light intensity of the light beam that passes through rotating mirror 801 and reflector 804 and reaches fiber optic interface 601.

[0064] The light beam reaching the incident optical fiber 301 is transmitted through the optical fiber to the light incident port 104, and enters the absorption pool 109 vertically through the incident filter 103. The incident filter 103 can block stray light other than the laser band from entering the absorption pool 109. The absorption pool 109 is filled with air, and the energy of the light beam is hardly absorbed. It passes through the sealed filter 111 and reaches the first reflector 113 of the probe. After being reflected by the first reflector 113 of the probe, it reaches the second reflector 112 of the probe, and is further reflected to the output filter 106, and then passes through the light output port 105 and enters the output optical fiber 303 vertically.

[0065] The resistance value of the temperature sensor 107 changes with the ambient temperature, and the change information is transmitted to the acquisition card 12 via the temperature data line 302. Similarly, the light intensity information in the output fiber 303 also passes through the second fiber combiner 15 and enters the second spectrometer 14 and is acquired by the acquisition card 12.

[0066] The detection device is calibrated by comparing the spectral data obtained by the first spectrometer 10 and the second spectrometer 14 when the probe 1 has almost no light absorption under atmospheric conditions.

[0067] After calibration, the float 2 is fixed to the appropriate position of the cluster line 3, and then the probe 1 is placed in the water area to be measured. The water first flows into the probe housing 110 through the water hole 102. The small holes in the water hole 102 can filter out aquatic plants, dead leaves, etc., and reduce the stray light in the environment from entering the probe housing 110. The water sample entering the probe housing 110 is further filled with the absorption pool 109 through the water trough 101. The planes where the two water troughs 101 and the two water holes 102 are located are perpendicular to each other, which can isolate the ambient stray light from entering the absorption pool 109 to the greatest extent possible to avoid interfering with the normal operation of the laser beam.

[0068] Starting at the incident filter 103, the laser beam's energy is characteristically absorbed by the water sample and passes through the probe's first reflector 113 and second reflector 112 to reach the exit filter 106, where absorption ends. It should be noted that since the sealing filter 111 isolates the water sample, preventing it from contaminating the mirror surfaces of the first and second reflector 113 and 112, the water sample's characteristic absorption optical path in the absorption cell 109 is simply the sum of the vertical distances from the incident filter 103 to the sealing filter 111 and from the sealing filter 111 to the exit filter 106. The resistance value of the temperature sensor 107 also changes with changes in the water sample's temperature.

[0069] The resistance change information from temperature sensor 107 is transmitted via temperature data signal line 302 to acquisition card 12. This information is processed by mainboard 13 to determine the temperature of the water sample in the area where probe 1 is located. The characteristically absorbed light beam passes through output fiber 303 and second fiber combiner 15 to reach second spectrometer 14. The spectral information obtained by second spectrometer 14 is transmitted to acquisition card 12 and compared with the spectral information from first spectrometer 10 to determine the COD information of the water sample in the area where probe 1 is located. Finally, the COD concentration and temperature of the water sample are displayed on display 11.

[0070] In addition, a multi-channel detection operation procedure and detailed explanation are provided.

[0071] The multi-channel water quality COD detection device for deep-earth environment development uses only all channels, that is, six probes 1 are required, and the corresponding optical fiber beam splitters 4 and beam lines are all 6 groups.

[0072] Before testing water quality, calibration data for all probes 1, measured in the absence of characteristic absorption, is also required. The calibration process follows the same steps and detailed explanation as described above for using a single probe 1. The difference is that the rotating reflector 801 rotates at a constant speed, reflecting the light beam onto the six reflectors 804 on the light reflection wheel 8 at a fixed time. The first and second spectrometers 14 record a set of six spectra.

[0073] When performing a three-dimensional measurement of the water area, the position of the float 2 on the beam line 3 is adjusted so that three of the six probes 1 are at the same horizontal depth at different locations in the water area, and the other three probes 1 are placed at different depths at the same location. The acquisition and processing of the characteristic absorption spectrum data of all probes 1 are the same as the steps and details described above when using a single probe 1. Although the laser beam is shared by the six channels, because the beam of each channel is distributed by the rotating reflector 801, only one channel has a beam at any one time. Therefore, the first spectrometer 10 and the second spectrometer 14 do not interfere with each other when recording the spectral light intensity information of the six channels.

[0074] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A multi-channel water quality COD detection device for deep earth environment development, characterized in that: It includes: A bundled wire (3) comprising a steel wire body (304) and a plurality of wire bundles arranged in the steel wire body (304); A probe (1) is connected to one end of the cluster line (3) and is used to be placed underwater. It includes a detection shell (100) and an absorption pool (109) arranged in the detection shell (100). The water body to be measured enters the absorption pool (109) through the detection shell (100). The top of the probe (1) is provided with a light input port (104) and a light output port (105). A reflection component is provided in the absorption pool (109). Light emitted from the light input port (104) into the absorption pool (109) is reflected by the reflection component and emitted from the light output port (105). an operating terminal connected to the other end of the bundle line (3) and used to emit detection light into the light inlet (104) through the bundle and analyze spectral information of light reflected back from the light outlet (105) through the bundle; The float (2) is mounted on the bundle line (3) and is used to suspend the probe (1) in the water body.

2. A multi-channel water quality COD detection device for deep earth environment development according to claim 1, characterized in that: The detection housing (100) is provided with a water hole (102), the absorption pool (109) is provided with a water groove (101), and a gap is provided between the detection housing (100) and the absorption pool (109). The water to be detected passes through the water hole (102), the gap and the water groove (101) in sequence and then enters the absorption pool (109); The penetration direction of the water hole (102) and the penetration direction of the water groove (101) are staggered, and are used to reduce the light in the water environment from entering the absorption pool (109).

3. A multi-channel water quality COD detection device for deep earth environment development according to claim 2, characterized in that: A plurality of water holes (102) are vertically opened on the detection housing (100), and the water trough (101) is vertically opened on the absorption pool (109), and the penetration direction of the water holes (102) is perpendicular to the penetration direction of the water trough (101).

4. The multi-channel water quality COD detection device for deep earth environment development according to claim 1, characterized in that: The detection housing (100) is cylindrical in shape as a whole, and comprises a housing body (117) and a probe cover (116) threadedly connected to the upper end of the housing body (117), a connecting boss (114) is provided on the probe cover (116), and a connecting cap (305) is provided at the end of the steel wire body (304), and the connecting cap (305) is connected to the connecting boss (114); The absorption pool (109) is cylindrical in shape as a whole, and a fixing stud (108) is provided at its bottom. A stud through-hole is provided at the bottom of the shell body (117) corresponding to the fixing stud (108). The fixing stud (108) passes through the stud through-hole and is then sleeved with a nut assembly. The nut assembly is tightened to fix the absorption pool (109) in the shell body (117).

5. A multi-channel water quality COD detection device for deep earth environment development according to claim 4, characterized in that: A threaded hole-shaped light inlet (104) and a threaded hole-shaped light outlet (105) are provided on the top of the probe upper cover (116), and an optical fiber connector (306) is threadedly connected to the light inlet (104) and the light outlet (105); The cluster line (3) comprises an incident optical fiber (301) and an output optical fiber (303), wherein the incident optical fiber (301) is connected to the optical fiber connector (306) on the light incident port (104), and the output optical fiber (303) is connected to the optical fiber connector (306) on the light output port (105).

6. A multi-channel water quality COD detection device for deep earth environment development according to claim 5, characterized in that: An incident filter (103) is provided at the top of the absorption pool (109) corresponding to the light incident port (104), and an exit filter (106) is provided at the top of the absorption pool (109) corresponding to the light exit port (105). Light entering the light incident port (104) passes through the incident filter (103) into the absorption pool (109), and is then reflected by the reflection component and emitted from the exit filter (106) out of the light exit port (105).

7. A multi-channel water quality COD detection device for deep earth environment development according to claim 6, characterized in that: A sealing filter (111) is provided at the lower part of the absorption pool (109), and a water-proof cavity is formed between the sealing filter (111) and the bottom of the absorption pool (109). The reflection component includes a first probe reflector (113) and a second probe reflector (112) arranged in the water-proof cavity. The first probe reflector (113) and the second probe reflector (112) are tilted and mirror-set. The first probe reflector (113) is relatively arranged below the incident filter (103), and the second probe reflector (112) is relatively arranged below the output filter (106).

8. The multi-channel water quality COD detection device for deep earth environment development according to claim 5, characterized in that: The cluster line (3) further includes a temperature data line (302) connected to the operation terminal. A temperature sensor (107) is provided on the top of the absorption pool (109). A wiring harness through hole is provided on the connection cap (305) and the connection boss (114) at opposite ends. The temperature data line (302) passes through the wiring harness through hole and is connected to the temperature sensor (107) for collecting water temperature information of the absorption pool (109) into the operation terminal.

9. A multi-channel water quality COD detection device for deep earth environment development according to claim 8, characterized in that: The operating terminal comprises a precision optical mechanical mechanism, an information processing module, a laser (7) and a display (11), and the operating terminal is connected to at least one of the beam lines (3); The precision optical mechanical mechanism comprises a six-channel optical fiber interface wheel (6) and a light reflection wheel (8) arranged relative to each other, the laser (7) being arranged between the six-channel optical fiber interface wheel (6) and the light reflection wheel (8), six groups of optical fiber interfaces (601) being uniformly arranged circumferentially on the six-channel optical fiber interface wheel (6), the incident optical fiber (301) of the bunching line (3) being connected to the optical fiber interface (601) on the six-channel optical fiber interface wheel (6) via a fiber beam splitter (4), and the precision optical mechanical mechanism being used to reflect the light beam emitted by the laser (7) into any of the optical fiber interfaces (601); The information processing module comprises a mainboard (13), an acquisition card (12) connected to the mainboard (13) with a wiring harness, a first spectrometer (10) connected to the acquisition card (12) with a wiring harness, a second spectrometer (14) connected to the acquisition card (12) with a wiring harness, a first optical fiber combiner (9) connected to the first spectrometer (10) with a wiring harness, and a second optical fiber combiner (15) connected to the second spectrometer (14) with a wiring harness, the display (11) being connected to the mainboard (13), the first optical fiber combiner (9) being connected to the optical fiber splitter (4) via a reference optical fiber (5), the second optical fiber combiner (15) being connected to the output optical fiber (303), and the temperature data line (302) being connected to the acquisition card (12).

10. The multi-channel water quality COD detection device for deep earth environment development according to claim 9, characterized in that: The light reflection wheel (8) comprises a second annular aluminum disk (803), six groups of reflection mirrors (804) uniformly arranged circumferentially on the second annular aluminum disk (803), a rotating reflection mirror (801) rotatably arranged at the center of the second annular aluminum disk (803), and a servo motor (802) for driving the rotating reflection mirror (801) to rotate, wherein the reflection mirror (804) corresponds to the optical fiber interface (601); The light beam emitted by the laser (7) is reflected by the rotating reflector (801) onto the reflector (804), and then reflected by the reflector (804) into the optical fiber interface (601); The servo motor (802) drives the rotating reflector (801) to rotate so as to reflect the light beam emitted by the laser (7) onto different reflectors (804).

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