CN211505373U - COD titration apparatus - Google Patents
COD titration apparatus Download PDFInfo
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- CN211505373U CN211505373U CN201922420544.4U CN201922420544U CN211505373U CN 211505373 U CN211505373 U CN 211505373U CN 201922420544 U CN201922420544 U CN 201922420544U CN 211505373 U CN211505373 U CN 211505373U
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Abstract
The utility model provides a COD titration apparatus, which belongs to the technical field of analytical instruments and comprises a camera bellows, a support frame arranged in the camera bellows, a reagent container placed on the support frame, a titration mechanism arranged in the camera bellows, a stirring mechanism, a white light source and a color industrial camera, wherein the titration mechanism is used for titrating a reagent into the reagent container; the stirring mechanism is used for stirring the reagent to be tested in the reagent container; the white light source is positioned on the side surface of the reagent container and used as a background light source; the color industrial camera and the white light source are respectively arranged on two opposite sides of the reagent container, and the center line of the lens of the color industrial camera and the center line of the white light source are positioned on the same horizontal line. The utility model provides a COD titration outfit, can avoid the influence that the environment veiling glare distinguishes to the colour of color industry camera, improve the accuracy that the titration result judges; the method can solve the problem that the existing spectrophotometry is inaccurate in the titration end point analysis of samples with different solubilities.
Description
Technical Field
The utility model belongs to the technical field of analytical instrument, more specifically say, relate to a COD titration outfit.
Background
Chemical Oxygen Demand (COD) is one of the most important comprehensive indexes of organic pollution in water environment monitoring, and is the comprehensive index for representing reductive substances in water, wherein the quantity of oxidant consumed in the process of treating a water sample by using a certain strong oxidant under a certain condition is expressed by milligram/liter of oxygen. The reducing substances in the water comprise various organic substances, nitrite, sulfide, ferrite and the like, but the main substances are organic substances, so the Chemical Oxygen Demand (COD) is often used as an index for measuring the content of the organic substances in the water, and the larger the chemical oxygen demand is, the more serious the pollution of the water body by the organic substances is.
During water quality detection, a COD titration method is required to quantitatively judge the oxygen content of water quality, and the method for judging the titration end point is to observe the color change of the solution, but due to the difference of the color sensitivity degree of individual operators, the detection results of different batches are different certainly, and the detection result is further influenced.
In the COD titrator disclosed at present, a color sensor is adopted to match with a light source to judge a titration end point, but a titration result is easily influenced by environmental stray light and the light source of equipment, so that a titration result judgment error is caused; the titration end point is judged by adopting a spectrophotometry, and the high-concentration sample has high turbidity, so that light cannot penetrate through the high-concentration sample or the light is weakened after the light penetrates through the high-concentration sample, so that the detection and digestion effect of the spectrophotometry on the high-concentration sample is insufficient, and the accurate judgment of the titration end point is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a COD titration outfit aims at solving current COD and titrates the terminal point and judge the unsafe problem of device judgement.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a COD titrator comprising: the device comprises a dark box for providing a closed space, a support frame arranged in the dark box, a reagent container placed on the support frame, a titration mechanism, a stirring mechanism, a white light source and a color industrial camera, wherein the titration mechanism is used for titrating a reagent into the reagent container; the stirring mechanism is arranged in the dark box and is used for stirring the reagent to be tested in the reagent container; the white light source is arranged in the dark box, is positioned on the side surface of the reagent container and is used as a background light source; the color industrial camera is arranged in the dark box, the white light source is arranged on two opposite sides of the reagent container, and the center line of the lens of the color industrial camera and the center line of the white light source are positioned on the same horizontal line.
In another embodiment of the present invention, the stirring mechanism is a magnetic stirrer, and is disposed below the reagent container.
As another embodiment of this application, titration mechanism includes through burette, drawing liquid pump and the drip nozzle of pipeline intercommunication, the burette with reagent container supports on same platform, the drawing liquid pump with the drip nozzle supports on the support frame, and is located reagent container's top.
As another embodiment of the present application, the white light source and the color industrial camera are symmetrically disposed with a center line of the reagent vessel as a symmetry axis.
As another embodiment of the present application, the white light source and the color industrial camera are both mounted on the support frame.
As another embodiment of the present application, the support stand includes: the lower support rod is fixed on a bottom plate of the camera bellows; the lower support platform is fixed on the lower support rod, and the reagent container is supported on the lower support platform; the upper support rod is fixed on the lower support platform, and the white light source and the color industrial camera are respectively arranged on the upper support rod; the upper supporting platform is fixed on the upper supporting rod, and the drip nozzle of the titration mechanism is fixed on the upper supporting platform.
As another embodiment of the present application, the white light source is an LED light source.
As another embodiment of the present application, the color industrial camera is a high resolution color industrial camera.
As another embodiment of the present application, the dark box has a rectangular parallelepiped structure.
As another embodiment of the application, the device also comprises an industrial computer system, wherein the color industrial camera is connected with the industrial computer system through a data line, the color industrial camera collects data of liquid in the reagent container, the data is transmitted to the industrial computer system through the data line, and color analysis and titration result calculation of a sample to be tested are realized through the industrial computer system.
The utility model provides a COD titration outfit's beneficial effect lies in: compared with the prior art, the COD titration device of the utility model arranges the white light source in the dark box, avoids the influence of environment stray light on the color discrimination of the color industrial camera, and improves the accuracy of titration result judgment; the white light source is arranged in the dark box, so that an environment with uniform illumination, purity and high brightness is provided for the reagent container, a color industrial camera can acquire definition and accurate data no matter a low-concentration sample to be detected or a high-concentration sample to be detected, the accuracy of titration result judgment is improved, the method is suitable for samples to be detected with different concentrations, and the problem that the existing spectrophotometry cannot accurately judge in titration end point analysis of samples with different concentrations can be solved; meanwhile, the operation error caused by visual observation of different operators is greatly reduced, the titration analysis result is accurate, and the experiment repeatability is good. The device overall structure is fairly simple, and it is convenient to make, and the practicality is strong, easily uses widely.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a COD titration apparatus provided in an embodiment of the present invention;
fig. 2 is the internal three-dimensional structure schematic diagram of the COD titration apparatus provided by the embodiment of the present invention.
In the figure: 1. a dark box; 2. a liquid pump; 3. a pipeline; 4. a drip nozzle; 5. a reagent container; 6. a color industrial camera; 7. a support frame; 71. an upper support platform; 72. an upper support rod; 73. a lower support platform; 74. a lower support bar; 8. a stirring mechanism; 9. a white light source; 10. a titration vessel.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2 together, the COD titration apparatus of the present invention will now be described. The COD titration apparatus comprises a dark box 1 for providing a closed space, a support frame 7 arranged in the dark box 1, a reagent container 5 placed on the support frame 7, a titration mechanism arranged in the dark box 1, a stirring mechanism 8, a white light source 9 and a color industrial camera 6, wherein the titration mechanism is used for titrating a reagent into the reagent container 5; the stirring mechanism 8 is arranged in the dark box 1 and is used for stirring the reagent to be tested in the reagent container 5; the white light source 9 is arranged in the dark box 1 and positioned on the side surface of the reagent container 5 and used as a background light source; the color industrial camera 6 is arranged in the camera bellows 1, the white light source 9 is respectively arranged at two opposite sides of the reagent container 5, and the central line of the lens of the color industrial camera 6 and the central line of the white light source 9 are positioned on the same horizontal line.
Compared with the prior art, the COD titration apparatus provided by the utility model has the advantages that the white light source 9 is arranged in the dark box 1, thereby avoiding the influence of environment stray light on the color discrimination of the color industrial camera 6 and improving the accuracy of titration result judgment; the white light source 9 is arranged in the dark box 1, so that an environment with uniform illumination, purity and high brightness is provided for the reagent container 5, the color industrial camera 6 can acquire definition and accurate data no matter a low-concentration sample to be detected or a high-concentration sample to be detected, the accuracy of titration result judgment is improved, the method is suitable for samples to be detected with different concentrations, and the problem that the existing spectrophotometry cannot accurately judge in the titration end point analysis of samples with different concentrations can be solved; meanwhile, the operation error caused by visual observation of different operators is greatly reduced, the titration analysis result is accurate, and the experiment repeatability is good. The device overall structure is fairly simple, and it is convenient to make, and the practicality is strong, easily uses widely.
As a specific embodiment of the COD titration apparatus provided by the present invention, please refer to fig. 1 to 2, the stirring mechanism 8 is a magnetic stirrer, and is disposed below the reagent container 5.
In this embodiment, the magnetic stirrer is a conventional stirring mechanism 8, and is used for mixing liquids, mainly for stirring or simultaneously heating and stirring low-viscosity liquids or solid-liquid mixtures. The basic principle is that magnetic stirrer inside container is driven by magnetic field to rotate circularly to stir liquid. The cooperation heating temperature control system can heat and control the sample temperature according to specific experimental requirement, maintains the required temperature condition of experimental condition, guarantees that liquid mixes and reaches the experiment demand.
In this embodiment, the stirring mechanism 8 utilizes the like-pole repulsion characteristic of magnetic substances, and the polarity at the two ends of the base is constantly changed to drive the magnetic stirrer to rotate, so that the sample is driven to rotate by the rotation of the magnetic stirrer, and the sample is uniformly mixed.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the titration mechanism includes a titration container 10, a liquid pump 2 and a drip nozzle 4 which are communicated through a pipeline 3, the titration container 10 and the reagent container 5 are supported on the same platform, the liquid pump 2 and the drip nozzle 4 are supported on a support frame 7 and are located above the reagent container 5. The titration mechanism in the embodiment is also a commonly used titration mechanism in the existing water environment monitoring and analyzing process. Wherein, the pipeline in this embodiment is a hose.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 and 2, the white light source 9 and the color industrial camera 6 are symmetrically disposed with a center line of the reagent container 5 as a symmetry axis. The white light source 9 is symmetrically arranged in the embodiment, and provides a good background light source, so that the accuracy of the data acquired by the color industrial camera 6 is improved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, wherein the white light source 9 and the color industrial camera 6 are both mounted on the supporting frame 7.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the supporting frame 7 includes: a lower support rod 74, a lower support platform 73, an upper support rod 72 and an upper support platform 71, wherein the lower support rod 74 is fixed on the bottom plate of the camera bellows 1; a lower support platform 73 is fixed on the lower support rod 74, and the reagent vessel 5 is supported on the lower support platform 73; the upper supporting rod 72 is fixed on the lower supporting platform 73, and the white light source 9 and the color industrial camera 6 are respectively installed on the upper supporting rod 72; the upper supporting platform 71 is fixed on the upper supporting rod 72, and the drip nozzle 4 of the titration mechanism is fixed on the upper supporting platform 71. The support frame 7 comprises an upper support platform 71 and a lower support platform 73, and the stirring mechanism 8 is arranged below the lower support platform 73 and is used for stirring the reagent container 5 which is arranged right above; the dripping nozzle 4 is arranged right above the reagent container 5 and drips the reagent into the reagent container 5, and the reagent is distributed in a layered mode, so that the planar area occupied by components is reduced, and the space utilization rate of the device is improved.
In this embodiment, the lower supporting rod 74 is detachably connected to the bottom plate of the camera bellows 1, the lower supporting rod 74 is detachably connected to the lower supporting platform 73, the upper supporting rod 72 is also detachably connected to the lower supporting platform 73 and the upper supporting platform 71, and the detachable connection is performed by screwing or plugging.
In this embodiment, the reagent container 5 and the titration container 10 are both placed on the lower supporting platform 73, and the placement position of the titration container 10 is increased, so that the lift of the reagent is shortened, and the energy consumption of the liquid pump 2 is reduced.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the white light source 9 is an LED light source.
As an embodiment of the present invention, please refer to fig. 1 to 2, wherein the color industrial camera 6 is a high resolution color industrial camera 6. The color industrial camera 6, which is a key component of the machine vision system, is the most essential function of converting light signals into ordered electrical signals. The selection of a proper camera is also an important link in the design of a machine vision system, and the selection of the camera not only directly determines the resolution, image quality and the like of the acquired image, but also is directly related to the operation mode of the whole system. Differences between industrial cameras and ordinary cameras: the industrial camera has stable and reliable performance, is easy to install, has compact and firm structure, is not easy to damage, and has long continuous working time; the shutter time of the industrial camera is very short, and objects moving at high speed can be captured; the image sensor of the industrial camera is scanned line by line, while the image sensor of the common camera is scanned in an interlaced way, the production process of the image sensor scanned line by line is complex, the yield is low, and the shipment volume is small; the frame rate of an industrial camera is much higher than that of a general camera. An industrial camera can shoot ten to hundreds of pictures per second, while a common camera can only shoot 2 to 3 images, and the difference is large; the industrial camera outputs raw data (raw data), and the spectral range of the raw data is often wide, so that the raw data is suitable for performing high-quality image processing algorithms, such as Machine Vision (Machine Vision) application. The spectrum range of the picture shot by the common camera is only suitable for the vision of human eyes, and the picture is compressed by mjpeg, so that the image quality is poor, and the picture is not beneficial to analysis and processing.
In the embodiment, the white light source 9 and the color industrial camera 6 are matched in the camera bellows 1, so that the accuracy of data acquisition is improved, and the accuracy of the final analysis result of the reagent to be tested can be ensured.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the camera bellows 1 is a cuboid structure, which is convenient for the layout and installation of the titration mechanism, the stirring mechanism, the support frame and other components. In this embodiment, one of the side panels of the dark box 1 is configured as a box door that can be opened.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, further including an industrial computer system, the color industrial camera 6 is connected to the industrial computer system through a data line, the color industrial camera 6 collects data of liquid in the reagent container 5, and transmits the data to the industrial computer system through the data line, so as to realize color analysis and titration result calculation of the sample to be tested through the industrial computer system.
During titration analysis, a sample to be titrated is placed in a reagent container 5, the reagent container 5 is placed on an agitating mechanism 8 in a titration dark box 1, the titration dark box 1 is closed, an LED white light source 9 and a high-resolution color industrial camera 6 are started to collect sample images, a titration mechanism is started to add liquid to start titration, when the color of the sample to be titrated reaches a preset range, the titration speed is slowed down, when the color change reaches a preset end point color, the titration liquid addition is stopped, at the moment, titration data are transmitted to an industrial computer, titration calculation is completed through titration analysis software, and a titration result is output.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
- A COD titration device, comprising:the camera bellows is used for providing a closed space;the supporting frame is arranged in the dark box;a reagent container placed on the support frame;the titration mechanism is arranged in the dark box and is used for titrating a reagent into the reagent container;the stirring mechanism is arranged in the dark box and is used for stirring the reagent to be tested in the reagent container;the white light source is arranged in the dark box, is positioned on the side surface of the reagent container and is used as a background light source; andthe color industrial camera is arranged in the dark box, the white light source is arranged on two opposite sides of the reagent container, and the center line of the lens of the color industrial camera and the center line of the white light source are positioned on the same horizontal line.
- 2. The COD titration device according to claim 1, wherein the stirring mechanism is a magnetic stirrer, and is disposed below the reagent container.
- 3. The COD titration device according to claim 1, wherein the titration mechanism comprises a titration vessel, a liquid pump and a drip nozzle connected by a pipeline, the titration vessel and the reagent vessel are supported on the same platform, and the liquid pump and the drip nozzle are supported on a support frame and located above the reagent vessel.
- 4. The COD titration device of claim 1, wherein the white light source and the color industrial camera are symmetrically disposed about a center line of the reagent container as an axis of symmetry.
- 5. The COD titration device of claim 1, wherein said white light source and said color industrial camera are both mounted on said support frame.
- 6. The COD titration device of claim 1, wherein the support frame comprises:the lower supporting rod is fixed on the bottom plate of the dark box;the lower support platform is fixed on the lower support rod, and the reagent container is supported on the lower support platform;the upper support rod is fixed on the lower support platform, and the white light source and the color industrial camera are respectively arranged on the upper support rod;and the upper supporting platform is fixed on the upper supporting rod, and the drip nozzle of the titration mechanism is fixed on the upper supporting platform.
- 7. The COD titration device of claim 1, wherein the white light source is an LED light source.
- 8. The COD titration device of claim 1, wherein the color industrial camera is a high resolution color industrial camera.
- 9. The COD titration device according to claim 1, wherein the dark box is of rectangular parallelepiped configuration.
- 10. The COD titration device according to any one of claims 1 to 9, further comprising an industrial computer system, wherein the color industrial camera is connected to the industrial computer system via a data line, wherein the color industrial camera collects data of the liquid in the reagent container and transmits the data to the industrial computer system via the data line, and the color analysis and titration result calculation of the sample to be tested are performed by the industrial computer system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420544.4U CN211505373U (en) | 2019-12-27 | 2019-12-27 | COD titration apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420544.4U CN211505373U (en) | 2019-12-27 | 2019-12-27 | COD titration apparatus |
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| CN211505373U true CN211505373U (en) | 2020-09-15 |
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| CN201922420544.4U Active CN211505373U (en) | 2019-12-27 | 2019-12-27 | COD titration apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833583A (en) * | 2021-06-28 | 2021-12-24 | 北京航天动力研究所 | Device and method for detecting leakage amount of gas tightness |
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- 2019-12-27 CN CN201922420544.4U patent/CN211505373U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833583A (en) * | 2021-06-28 | 2021-12-24 | 北京航天动力研究所 | Device and method for detecting leakage amount of gas tightness |
| CN113833583B (en) * | 2021-06-28 | 2024-05-31 | 北京航天动力研究所 | Device and method for detecting leakage amount of gas tightness |
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