Portable COD (Chemical Oxygen Demand) detector

Abstract

The utility model discloses a portable COD (Chemical Oxygen Demand) detector which comprises a handheld box, and the handheld box consists of an upper cover and a lower cover and comprises a digestion assembly, a cooling assembly and a colorimetric groove assembly. The digestion assembly comprises a digestion turntable, a digestion rotating shaft, a heating shell, a heating wire and a driving motor. The cooling assembly comprises a cooling box, a fan, an exhaust hole and an exhaust pipe, a cooling sample hole is formed in the upper end face of the cooling box, the fan is arranged in the exhaust hole, one end of the exhaust pipe is connected with the exhaust hole, and the other end of the exhaust pipe penetrates through the side wall of the lower cover. The device is provided with the digestion component, so that organic matters in a water sample can be fully oxidized, and the accuracy of a detection result is ensured. Meanwhile, the cooling assembly accelerates sample cooling, detection time is shortened, and detection efficiency is improved. Meanwhile, the whole structure is portable and is suitable for various field detection scenes.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality testing equipment, specifically a portable COD detector. Background Art

[0002] In water quality testing, chemical oxygen demand (COD) is an important indicator for measuring the degree of organic pollution in water bodies. Traditional COD testing methods usually require laboratory testing, which involves bulky, complex, and inconvenient equipment.

[0003] While some portable COD detectors currently on the market have solved the portability issue to some extent, they still have many shortcomings. One important problem is that many existing detectors lack a dedicated digestion function.

[0004] Digestion is a crucial step in COD detection. Digestion fully oxidizes organic matter in water samples, transforming it into a measurable form. Without effective digestion, it is difficult to accurately determine the COD value of a water sample.

[0005] Some existing portable COD analyzers lack dedicated digestion components, often limiting them to simple measurements and failing to adequately digest water samples, significantly reducing the accuracy of test results. Furthermore, incomplete oxidation of organic matter can lead to misinterpretations. For example, in water samples containing recalcitrant organic matter, without effective digestion, the analyzer may be unable to accurately measure the COD value, thus affecting the correct assessment of water quality. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] The technical problem this invention aims to solve is that some existing portable COD detectors, lacking specialized digestion components, often only perform simple measurements and cannot adequately digest water samples, resulting in significantly reduced accuracy of test results. Furthermore, they may lead to misjudgments due to incomplete oxidation of organic matter.

[0008] (2) Technical solution

[0009] To solve the above problems, this utility model provides the following technical solution:

[0010] A portable COD detector includes a handheld box, which consists of an upper cover and a lower cover, and includes a digestion component, a cooling component, and a colorimetric cell component.

[0011] The digestion assembly includes a digestion turntable, a digestion shaft, a heating shell, a heating wire, and a drive motor. One end of the digestion shaft is fixedly connected to the digestion turntable, and the other end is connected to the lower cover via a bearing. The heating shell is disposed on the outer ring of the digestion turntable, and the heating wire is disposed on the inner wall of the heating shell. The digestion shaft is connected to the heating shell via a bearing, and the drive motor is connected to the digestion shaft via a gear connection. The digestion turntable is also provided with a digestion sample tube hole.

[0012] The cooling assembly includes a cooling box, a fan, an exhaust vent, and an exhaust pipe. The upper surface of the cooling box is provided with a sample cooling hole, and the upper surface of the cooling box extends to the upper side of the upper cover. The bottom of the cooling box is fixedly connected to the upper surface of the lower cover. The fan is disposed in the exhaust vent, and one end of the exhaust pipe is connected to the exhaust vent, while the other end penetrates the side wall of the lower cover.

[0013] The colorimetric cell assembly includes a colorimetric cell body, a colorimetric lamp, a first control circuit board, a photoelectric sensor, and a second control circuit board. The colorimetric cell body has a colorimetric sample hole in the middle. The side of the colorimetric cell body near the colorimetric lamp has a light channel one corresponding to the outer contour of the colorimetric lamp. The side of the colorimetric cell body near the photoelectric sensor has a light channel two corresponding to the outer contour of the photoelectric sensor. The colorimetric lamp is disposed in the first light channel and is electrically connected to the first control circuit board. The photoelectric sensor is disposed in the second light channel and is electrically connected to the second control circuit board. The first control circuit board is inherently connected to the side of the colorimetric cell body, and the second control circuit board is also inherently connected to the side of the colorimetric cell body.

[0014] Furthermore, air inlets are provided on two sides of the lower cover near the cooling assembly.

[0015] Furthermore, the lower cover is provided with a heat insulation plate, which separates the digestion component, the cooling component, and the colorimetric cell component.

[0016] Furthermore, both the digestion sample tube holes and the cooling sample holes are provided in multiple quantities and are evenly arranged.

[0017] Furthermore, a battery pack is also provided on the lower cover, and the battery pack is installed in the battery compartment.

[0018] Furthermore, the upper cover is provided with a digestion protection cover, a cooling protection cover, and a colorimetric protection cover.

[0019] Furthermore, the top cover is also equipped with a display screen and an operation panel, and a processor is also located on the back of the top cover.

[0020] (3) Beneficial effects

[0021] The beneficial effects of this utility model are:

[0022] 1. Precise detection: Equipped with a digestion component, it can fully oxidize the organic matter in the water sample, ensuring the accuracy of the test results.

[0023] 2. High efficiency and convenience: The cooling component accelerates sample cooling, shortens detection time, and improves detection efficiency. Meanwhile, the overall structure is portable and suitable for various on-site testing scenarios. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the digestion component of this utility model;

[0027] Figure 4 This is a cross-sectional view of the present invention. Figure 2 ;

[0028] Figure 5 This is a schematic diagram of the colorimeter cell assembly of this utility model;

[0029] Figure 6 This is a schematic diagram of the cooling component of this utility model;

[0030] Figure 7 This is a schematic diagram showing the location of the insulation board in this utility model.

[0031] Markings in the diagram: 1-Handheld box, 101-Top cover, 102-Bottom cover;

[0032] 2-Digestion assembly, 201-Digestion turntable, 202-Digestion shaft, 203-Heating shell, 204-Heating wire, 205-Drive motor;

[0033] 3-Cooling components, 301-Cooling box, 302-Fan, 303-Exhaust vent, 304-Exhaust pipe;

[0034] 4-Colorimeter cell assembly, 401-Colorimeter cell body, 402-Colorimeter lamp, 403-First control circuit board, 404-Photoelectric sensor, 405-Second control circuit board, 406-Optical channel one, 407-Optical channel two;

[0035] 5-Air inlet, 6-Insulation plate, 7-Battery pack, 8-Battery compartment, 9-Disinfection protection cover, 10-Cooling protection cover, 11-Colorimetric protection cover, 12-Processor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Please see Figures 1-7 The portable COD analyzer shown includes a handheld box 1, which consists of an upper cover 101 and a lower cover 102. The handheld box 1 includes a digestion assembly 2, a cooling assembly 3, and a colorimetric cell assembly 4. The digestion assembly 2 is used to hold the water sample to be tested and the reagents. The cooling assembly 3 is used to cool the digested water sample, reducing the cooling time and shortening the detection waiting time. The colorimetric cell assembly 4 is used for colorimetric detection of the water sample.

[0039] The digestion assembly 2 includes a digestion turntable 201, a digestion shaft 202, a heating shell 203, a heating wire 204, and a drive motor 205. One end of the digestion shaft 202 is fixedly connected to the digestion turntable 201, and the other end is connected to the lower cover 102 through a bearing. The heating shell 203 is disposed on the outer ring of the digestion turntable 201, and the heating wire 204 is disposed on the inner wall of the heating shell 203. The digestion shaft 202 is connected to the heating shell 203 through a bearing, and the drive motor 205 is connected to the digestion shaft 202 through a gear connection. The digestion turntable 201 is also provided with a digestion sample tube hole 206.

[0040] The water sample is placed into the digestion sample tube hole 206. The drive motor 205 drives the digestion shaft 202 to rotate the digestion turntable 201, thereby rotating the water sample and increasing the digestion speed. In order to further improve the digestion speed and digestion completeness, a heating wire is set to appropriately heat the water sample, which further improves the digestion speed and digestion completeness of the water sample.

[0041] After digestion, the water sample needs to be cooled to room temperature before testing. To improve the cooling speed, a special cooling component 3 was designed.

[0042] The cooling assembly 3 includes a cooling box 301, a fan 302, an exhaust vent 303, and an exhaust pipe 304. The upper surface of the cooling box 301 has a sample cooling hole 305, and the upper surface of the cooling box 301 extends to the upper side of the upper cover 101. The bottom of the cooling box 301 is fixedly connected to the upper surface of the lower cover 102. The fan 302 is disposed in the exhaust vent 303, and one end of the exhaust pipe 304 is connected to the exhaust vent 303, while the other end penetrates the side wall of the lower cover 102. Air inlets 5 are also provided on two sides of the lower cover 102 near the cooling assembly 3. The fan 302 exhausts the hotter air from the cooling box 301, and the hotter air enters the cooler air through the air inlets 5, achieving rapid cooling of the water sample.

[0043] The colorimetric cell assembly 4 includes a colorimetric cell body 401, a colorimetric lamp 402, a first control circuit board 403, a photoelectric sensor 404, and a second control circuit board 405. The colorimetric cell body 401 has a colorimetric sample hole 408 in the middle. The side of the colorimetric cell body 401 near the colorimetric lamp 402 has a light channel 406 corresponding to the outer contour of the colorimetric lamp 402. The side of the colorimetric cell body 401 near the photoelectric sensor 404 has a light channel 407 corresponding to the outer contour of the photoelectric sensor 404. The colorimetric lamp 402 is disposed in the light channel 406 and is electrically connected to the first control circuit board 403. The photoelectric sensor 404 is disposed in the light channel 407 and is electrically connected to the second control circuit board 405. The first control circuit board 403 is inherently connected to the side of the colorimetric cell body 401, and the second control circuit board 405 is also inherently connected to the side of the colorimetric cell body 401. The top cover 101 is also equipped with a display screen and an operation panel, and the back of the top cover 101 is equipped with a processor 12.

[0044] The cooled water sample is placed in the colorimetric sample well 408. The processor 12 provides a signal to the first control circuit board 403 to drive the colorimetric lamp 402 to emit light. The light passes through the first light channel 406 and penetrates the test tube of the water sample. It then shines on the photoelectric sensor 404 through the second light channel 407. The signal is then transmitted to the processor 12 for analysis and processing via the second control circuit board 405. Finally, the detection result is displayed on the screen.

[0045] Specifically, the lower cover 102 is provided with a heat insulation plate 6, which separates the digestion component 2, the cooling component 3 and the colorimetric cell component 4.

[0046] In this embodiment, a heat-insulating baffle plate 6 is provided to reduce the impact of heat on the cooled water sample in the cooling assembly 3 and the water sample in the colorimetric cell assembly 4 during the heating process of the water sample for testing. The heat-insulating baffle plate 6 can be made of a heat-insulating material available in the prior art.

[0047] Specifically, there are multiple digestion sample tube holes 206 and cooling sample holes 305, and they are all evenly arranged.

[0048] In this embodiment, multiple digestion sample tube holes 206 and cooling sample tube holes 305 are provided, which can digest and cool multiple water samples at the same time, thereby improving detection efficiency.

[0049] Specifically, the lower cover 102 is also equipped with a battery pack 7, which is installed in the battery compartment 8.

[0050] In this embodiment, battery pack 7 is mainly used to provide driving power for the device in this case.

[0051] Specifically, the top cover 101 is equipped with a digestion protection cover 9, a cooling protection cover 10, and a colorimetric protection cover 11.

[0052] In this embodiment, the digestion protection cover 9 is installed on the digestion assembly 2 to protect the test water sample during digestion. Similarly, the cooling protection cover 10 and the colorimetric protection cover 11 provide certain protection for the test water sample placed in their respective positions.

[0053] The working principle is as follows: After processing the prepared water sample to be digested, the operator places it into the digestion sample tube hole 206. The drive motor 205 drives the digestion shaft 202 to rotate, while the heating wire 204 heats the sample. By heating the water sample and rotating it at a certain speed, the digestion speed and the degree of digestion are increased. After digestion, the water sample is placed into the cooling sample hole 305 in the cooling assembly 3. The fan 302 exhausts the hot air from the cooling box 301 and introduces the cooler air through the air inlet 5, achieving the purpose of rapidly cooling the water sample. After cooling, the water sample is placed in the color sample well 408. The processor 12 provides a signal to the first control circuit board 403 to drive the colorimetric lamp 402 to emit light. The light passes through the first light channel 406 and penetrates the test tube of the water sample. It then shines onto the photoelectric sensor 404 through the second light channel 407. The signal is then transmitted to the processor 12 via the second control circuit board 405 for analysis and processing. Finally, the detection result is displayed on the screen.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A portable COD detector, comprising a handheld case (1), said handheld case (1) being composed of an upper cover (101) and a lower cover (102), characterized in that: It includes a digestion component (2), a cooling component (3), and a colorimetric cell component (4); The digestion assembly (2) includes a digestion turntable (201), a digestion shaft (202), a heating shell (203), a heating wire (204), and a drive motor (205). One end of the digestion shaft (202) is fixedly connected to the digestion turntable (201), and the other end is connected to the lower cover (102) through a bearing. The heating shell (203) is disposed on the outer ring of the digestion turntable (201), and the heating wire (204) is disposed on the inner wall of the heating shell (203). The digestion shaft (202) is connected to the heating shell (203) through a bearing, and the drive motor (205) is connected to the digestion shaft (202) through a gear connection. The digestion turntable (201) is also provided with a digestion sample tube hole (206). The cooling assembly (3) includes a cooling box (301), a fan (302), an exhaust hole (303), and an exhaust pipe (304). The upper surface of the cooling box (301) is provided with a cooling sample hole (305), and the upper surface of the cooling box (301) extends to the upper side of the upper cover (101). The bottom of the cooling box (301) is fixedly connected to the upper surface of the lower cover (102). The fan (302) is disposed in the exhaust hole (303), and one end of the exhaust pipe (304) is connected to the exhaust hole (303), and the other end penetrates the side wall of the lower cover (102). The colorimetric cell assembly (4) includes a colorimetric cell body (401), a colorimetric lamp (402), a first control circuit board (403), a photoelectric sensor (404), and a second control circuit board (405). The colorimetric cell body (401) has a colorimetric sample hole (408) in the middle. A light channel (406) corresponding to the outer contour of the colorimetric lamp (402) is provided on the side of the colorimetric cell body (401) near the colorimetric lamp (402). A light channel (406) corresponding to the outer contour of the colorimetric lamp (402) is provided on the side of the colorimetric cell body (401) near the photoelectric sensor (404). The photoelectric sensor (404) is located in the second light channel (407) corresponding to the outer contour of the sensor (404). The color matching lamp (402) is disposed in the first light channel (406) and electrically connected to the first control circuit board (403). The photoelectric sensor (404) is disposed in the second light channel (407) and electrically connected to the second control circuit board (405). The first control circuit board (403) is inherently connected to the side of the color matching tank (401), and the second control circuit board (405) is also inherently connected to the side of the color matching tank (401).

2. The portable COD detector according to claim 1, characterized in that: The lower cover (102) is also provided with air inlets (5) on two sides near the end of the cooling assembly (3).

3. A portable COD detector according to claim 1, characterized in that: The lower cover (102) is provided with a heat insulation plate (6), which separates the digestion component (2), the cooling component (3) and the colorimetric cell component (4).

4. A portable COD detector according to claim 1, characterized in that: The digestion sample tube hole (206) and the cooling sample hole (305) are provided in multiple quantities and are evenly arranged.

5. A portable COD detector according to claim 1, characterized in that: The lower cover (102) is also provided with a battery pack (7), which is installed in the battery compartment (8).

6. A portable COD detector according to claim 1, characterized in that: The upper cover (101) is provided with a digestion protection cover (9), a cooling protection cover (10) and a colorimetric protection cover (11).

7. A portable COD detector according to claim 1, characterized in that: The top cover (101) is also provided with a display screen and an operation panel, and the back of the top cover (101) is also provided with a processor (12).

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