Water quality COD (Chemical Oxygen Demand) detection system convenient for sample fixation

Abstract

The utility model relates to a water quality COD (Chemical Oxygen Demand) detection system convenient for sample fixation. The lower end of a sampling platform is connected with a sample platform; the reaction device is mounted in the cabinet body; the sample rotating assembly comprises a precise subdivision rotary table, a sample disc and a sample fixing plate, the sample disc is installed on the precise subdivision rotary table, the sample fixing plate is installed on the sample disc, the sample fixing plate is matched with the sample disc to be used for installing and fixing more than two sample bottles, and the precise subdivision rotary table is used for driving the sample disc to rotate; the sampling device is used for extracting electrolyte in an external electrolysis barrel into the reaction device, and extracting mixed sample liquid from a sample bottle on the sample device into the reaction device for electrochemical reaction. COD is detected based on an electrochemical method, chemical reagents are not needed, the environment is not polluted, and the method is harmless to human bodies. In addition, the rotating angle of the sample disc is more accurate through the precise subdivision rotary table, and the sample fixing plate is beneficial to stable placement of the sample bottles.

Description

Technical Field

[0001] The utility model relates to the field of water quality COD detection, in particular to a water quality COD detection system which is convenient for fixing samples. Background Art

[0002] COD (Chemical Oxygen Demand) is the oxygen equivalent of substances (generally organic matter) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent and polluted water. In the study of river pollution and industrial wastewater properties and the operation and management of wastewater treatment plants, it is an important and quickly measured organic pollution parameter, often represented by the symbol COD.

[0003] The patent number is CN115436303A, which is an integrated water quality COD detection device. It is mainly composed of a sample introduction device, a digestion cooling device and a detection system. The sample introduction device is composed of a funnel-shaped liquid storage tank and a liquid inlet pipe connected to a two-position three-way solenoid valve. The two-position three-way solenoid valve is controlled to allow the water sample and reagent in the liquid storage tank to enter the digestion cooling device. The digestion cooling device includes a vacuum generator, a sealed microwave digestion box, a digestion colorimetric integrated tube, a cooling tube and a small fan. The detection system is composed of a light-emitting diode and a silicon photocell. The present invention adopts an integrated structure as a whole, thereby effectively solving the problem of cumbersome operation and certain safety hazards in the process of detecting water quality COD by rapid digestion spectrophotometry. However, the detection of water quality COD by photometry requires the use of toxic and harmful chemical reagents, which not only pollutes the environment, but also is harmful to the human body. Utility Model Content

[0004] In view of the above problems, the present application provides a water quality COD detection system that is easy to fix samples, which is used to solve the technical problem that the detection of water quality COD by photometry requires the use of toxic and harmful chemical reagents, which not only pollutes the environment but is also harmful to the human body.

[0005] To achieve the above-mentioned purpose, the utility model provides a water quality COD detection system that is convenient for sample fixation, including a cabinet, a reaction device, a sample device and a sampling device; a sampling platform and a sample platform are arranged in the cabinet, and the lower end of the sampling platform is connected to the sample platform; the reaction device is installed in the cabinet; the sample device is installed on the sample platform, the sample device includes a sample rotation component, the sample rotation component includes a precision subdivision turntable, a sample tray and a sample fixing plate, the precision subdivision turntable is installed with a sample tray, the sample tray is installed with a sample fixing plate, the sample fixing plate cooperates with the sample tray to install and fix more than two sample bottles, and the precision subdivision turntable is used to drive the sample tray to rotate; the sampling device is installed on the sampling platform, the sampling device is used to extract the electrolyte in the external electrolysis barrel to the reaction device, and extract the mixed sample liquid from the sample bottle on the sample device and extract it into the reaction device for electrochemical reaction.

[0006] Different from the prior art, the technical solution of the present application is provided with a cabinet to integrate various devices for easy use. The external electrolyte is extracted into the reaction device through the sampling device, and the mixed sample liquid is extracted from the sample bottle on the sample device and extracted into the reaction device for electrochemical reaction. The COD is detected based on the electrochemical method, without the use of chemical reagents, without polluting the environment and harmless to the human body. And the whole process is based on the coordinated use of the sample device and the sampling device, with a high degree of automation and high measurement accuracy. In addition, the rotation angle of the sample plate is more accurate through the precise subdivision of the turntable, and the sample fixing plate is conducive to the stable placement of the sample bottle.

[0007] As an implementation mode of the utility model, the sample disc is provided with two or more sample placement holes along its circumference, and the sample fixing plate is provided with two or more sample fixing holes at positions corresponding to the sample placement holes.

[0008] As an implementation mode of the present utility model, the sample rotating assembly further includes a positioning pin, and the middle part of the sample fixing plate is connected to the middle part of the sample tray through the positioning pin.

[0009] In this way, the sample placement hole can facilitate the insertion of the sample bottle, thereby facilitating installation and fixation. Optionally, the sample plate is provided with two circles of sample placement holes along the circumference of the device, and the sample fixing plate is provided with two circles of sample fixing holes at corresponding positions to support batch testing of samples. In addition, the positioning pin is mainly used to determine the relative position between the two parts and ensure that they remain stable during movement or force.

[0010] As an embodiment of the utility model, the sampling device includes an electrolyte sampling device and a sample liquid sampling device; the electrolyte sampling device is installed on the back of the sampling platform, and the electrolyte sampling device is used to extract the electrolyte in the external electrolysis barrel to the reaction device through the third pipeline module; the sample liquid sampling device is installed on the front of the sampling platform, and the sampling end of the sample liquid sampling device moves along the first direction and / or the second direction, so that the sampling end of the sample liquid sampling device extracts the mixed sample liquid from the sample bottle on the sample device and extracts it into the reaction device for electrochemical reaction.

[0011] In this way, the electrolyte in the external electrolytic barrel can be extracted into the reaction device through the electrolyte sampling device, and the mixed sample liquid can be extracted from the sample bottle on the sample device through the sample liquid sampling device and extracted into the reaction device for electrochemical reaction. The two links are operated separately, which is convenient for parameter adjustment and separate operation.

[0012] As an embodiment of the utility model, the sample liquid sampling device includes two sampling mechanisms, each sampling mechanism includes a transverse moving component, a longitudinal moving component and a sample liquid sampler; the longitudinal moving component is slidably installed on the transverse moving component, the sample liquid sampler is installed on the longitudinal moving component, and the extraction end of the sample liquid sampler is aligned with the sample device; the transverse moving component is used to drive the longitudinal moving component to move along a first direction, and the longitudinal moving component is used to drive the sample liquid sampler to move along a second direction, so that the extraction end of the sample liquid sampler extracts the mixed sample liquid from the sample bottle on the sample device into the reaction device for electrochemical reaction.

[0013] In this way, the two sampling mechanisms have the same structure but different installation positions. One of the sampling mechanisms is set close to the needle washer, which can wash the needle through the needle washer and extract the pure water in the needle washer into the sample bottle above the sample rotating component, which is convenient for subsequent dilution. The other sampling mechanism is close to the needle washer and the sewage discharger. It washes the needle through the needle washer and discharges the sewage after cleaning through the sewage discharger. After that, the sampling mechanism extracts the original liquid in the sample bottle containing the original liquid into the sample bottle containing pure water under the action of the horizontal moving component and the vertical moving component, and repeats it many times until it is evenly mixed, and then it is extracted into the reaction device to undergo electrochemical reaction for detection.

[0014] As an embodiment of the utility model, the transverse movement component includes a transverse movement drive unit, a transverse slide rail and a transverse slider, and the longitudinal movement component includes a longitudinal movement drive unit and a longitudinal slide rail; the output end of the transverse movement drive unit is connected to the transverse slide rail, the longitudinal slide rail slides on the transverse slide rail through the transverse slider, the output end of the longitudinal movement drive unit is connected to the longitudinal slide rail, the sample liquid sampler is installed on the longitudinal slide rail, the transverse movement drive unit is used to drive the transverse slide rail to move along the first direction, and the longitudinal movement drive unit is used to drive the sample liquid sampler to move along the second direction.

[0015] In this way, the transverse movement driving unit and the longitudinal movement driving unit can be motors, which drive the transverse slide rail to move along the first direction under the action of the transverse movement driving unit, so that the longitudinal movement component can move along the first direction, and the longitudinal movement driving unit can drive the sample liquid sampler to move along the second direction, thereby realizing the movement of the sample liquid sampler along the first direction and / or the second direction.

[0016] As an embodiment of the utility model, the sample device also includes a diluter, a needle washer and a drainer. The diluter is installed on one side of the sample tray, and the needle washer and the drainer are installed on the other side of the sample tray. A sampling mechanism close to one side of the diluter washes the needle through the needle washer and draws pure water from an external pure water bucket into an empty sample bottle, and another sampling mechanism close to one side of the needle washer washes the needle through the needle washer and discharges the cleaned waste water through the drainer.

[0017] In this way, the diluter can be used to clean the sampling mechanism close to it and to dilute the stock solution later. Specifically, the sampling mechanism on the side close to the diluter is first cleaned (the sample liquid sampler of the sampling mechanism is first moved to the diluter to extract a certain amount of pure water, and then returned to the diluter. Before the sample liquid sampler of the sampling mechanism formally extracts, the pure water in the diluter will be discharged to the external waste water bucket, and then the pure water in the external pure water bucket will be re-extracted to the diluter.) After that, the sample liquid sampler of the sampling mechanism starts the extraction work and injects the pure water extracted from the diluter into the empty sample bottle. The needle washer can be used to clean the sampling mechanism close to it. Specifically, the sample liquid sampler of the sampling mechanism is first moved to the needle washer to extract a certain amount of pure water, and then extracted to the sewage drainer.

[0018] As an embodiment of the utility model, the electrolyte sampling device includes an electrolyte moving component and an electrolyte sampler, the electrolyte sampler is installed on the electrolyte moving component, the extraction end of the electrolyte sampler is aligned with the external electrolysis barrel, and the electrolyte moving component is used to drive the electrolyte sampler to move along the second direction so that the extraction end of the electrolyte sampler extracts electrolyte from the external electrolysis barrel to the reaction device.

[0019] In this way, the electrolyte moving assembly can drive the electrolyte sampler to move along the second direction to extract electrolyte from the external electrolytic barrel. Afterwards, the electrolyte sampler extracts the electrolyte to the reaction device.

[0020] As an embodiment of the utility model, the electrolyte moving component includes an electrolyte moving drive unit, an electrolyte moving slide rail, an electrolyte moving slider, a guide rail fixing plate and an electrolyte fixing plate; the output end of the electrolyte moving drive unit is connected to the electrolyte moving slide rail, the extraction needle of the electrolyte sampler slides on the electrolyte moving slide rail through the electrolyte moving slider, the guide rail fixing plate is installed above the electrolyte moving slide rail, the syringe of the electrolyte sampler is fixedly installed between the guide rail fixing plate and the electrolyte fixing plate, the electrolyte fixing plate is installed above the guide rail fixing plate, a groove is opened on the electrolyte fixing plate, and the extraction end of the extraction needle of the electrolyte sampler protrudes from the groove.

[0021] In this way, the syringe of the electrolyte sampler can be fixed by the guide rail fixing plate and the electrolyte fixing plate, and an injection needle is movably connected to the syringe, and the movable end of the injection needle is connected to the electrolyte moving slider. Therefore, under the action of the electrolyte moving drive unit, it can move along the electrolyte moving slide rail, so that the extraction end of the injection needle moves along the second direction to extract electrolyte.

[0022] As an implementation mode of the present utility model, a data transmission port is arranged on the front of the cabinet, and a power interface and a power button are arranged on the side of the cabinet.

[0023] In this way, the external storage device can be connected to the water quality COD detection system for easy sample fixation through the data transmission port. For example, the external storage device can be set as a U disk, and after the test is completed, the U disk is inserted into the data transmission port for data storage.

[0024] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0026] In the drawings of the specification:

[0027] Figure 1 A schematic diagram of a water quality COD detection system according to an embodiment of the present application;

[0028] Figure 2 Another schematic diagram of a water quality COD detection system according to an embodiment of the present application;

[0029] Figure 3A partial schematic diagram of a water quality COD detection system according to an embodiment of the present application Figure 1 ;

[0030] Figure 4 A partial schematic diagram of a water quality COD detection system according to an embodiment of the present application Figure 2 ;

[0031] Figure 5 A partial schematic diagram of a water quality COD detection system according to an embodiment of the present application Figure 3 ;

[0032] Figure 6 A partial schematic diagram of a sample device according to an embodiment of the present application;

[0033] Figure 7 A partial schematic diagram of a COD detection system according to an embodiment of the present application Figure 4 ;

[0034] Figure 8 A partial schematic diagram of a water quality COD detection system according to an embodiment of the present application Figure 5 ;

[0035] Fig. 9 This is a schematic diagram of an electrolyte sampling device according to an embodiment of the present application.

[0036] The reference numerals in the above drawings are described as follows:

[0037] 100. Water quality COD detection system;

[0038] 1. Cabinet; 10. Sampling platform; 11. Sample platform; 12. PLC controller; 13. Radiator; 14. Stepper motor driver; 15. DC regulated power supply; 16. Display; 17. Power interface; 18. Power button; 19. Data transmission port;

[0039] 21. Reactor; 22. Electrochemical workstation;

[0040] 3. Sample device; 31. Sample rotating assembly; 311. Precision subdivision turntable; 312. Sample plate; 3121. Sample placement hole; 313. Sample fixing plate; 3131. Sample fixing hole; 314. Positioning pin; 32. Diluter; 33. Needle washer; 34. Drainer; 35. Sample injector;

[0041] 4. Electrolyte sampling device; 41. Electrolyte moving assembly; 411. Electrolyte moving drive unit; 412. Electrolyte moving slide rail; 413. Electrolyte moving slider; 414. Guide rail fixing plate; 415. Electrolyte fixing plate; 42. Electrolyte sampler;

[0042] 5. Sample liquid sampling device; 51. Sampling mechanism; 511. Lateral moving component; 5111. Lateral moving drive unit; 5112. Lateral slide rail; 5113. Lateral slide block; 512. Longitudinal moving component; 5121. Longitudinal moving drive unit; 5122. Longitudinal slide rail; 513. Sample liquid sampler; a. First direction; b. Second direction. DETAILED DESCRIPTION

[0043] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0044] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0045] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0046] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0047] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0048] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0049] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0050] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0051] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] According to some embodiments of the present application, please refer to Figures 1 to 9The present embodiment involves a cabinet 1, a reaction device, a sample device 3 and a sampling device; a sampling platform 10 and a sample platform 11 are provided in the cabinet 1, and the lower end of the sampling platform 10 is connected to the sample platform 11; the reaction device is installed in the cabinet 1; the sample device 3 is installed on the sample platform 11, and the sample device 3 includes a sample rotation component 31, and the sample rotation component 31 includes a precision subdivision turntable 311, a sample disk 312 and a sample fixing plate 313, a sample disk 312 is installed on the precision subdivision turntable 311, and a sample fixing plate 313 is installed on the sample disk 312, and the sample fixing plate 313 cooperates with the sample disk 312 to install and fix more than two sample bottles, and the precision subdivision turntable 311 is used to drive the sample disk 312 to rotate; the sampling device is installed on the sampling platform 10, and the sampling device is used to extract the electrolyte in the external electrolytic barrel to the reaction device, and extract the mixed sample liquid from the sample bottle on the sample device 3 and extract it into the reaction device for electrochemical reaction.

[0053] The reaction device includes a reactor 21 and an electrochemical workstation 22, wherein the reactor 21 is connected to the electrodes of the electrochemical workstation 22. The subsequent electrochemical reaction is ensured by connecting the electrodes of the reactor 21 and the electrochemical workstation 22. The electrolyte extracted from the outside is extracted into the reactor 21, and the sample liquid undergoes an electrochemical reaction in the reactor 21.

[0054] In this way, the display 16 is provided with various buttons (such as: start button, detection button and stop button, etc.) and the display 16 can display the current response generated after the electrochemical reaction. The display 16 is convenient for observing the current response when the sample to be tested undergoes an electrochemical reaction, and mechanical instruction operation can also be performed for mechanical calibration before the test, and an external storage device can save the test data in time. The cabinet 1 is also equipped with a PLC controller 12, a DC regulated power supply 15, a stepper motor driver 14 and a radiator 13, the DC regulated power supply 15 is used to power the water quality COD detection system 100, and the radiator 13 is communicated with the external air to reduce the heat generated by the control cabinet.

[0055] The technical solution of the present application is provided with a cabinet 1 that integrates various devices for easy use. The external electrolyte is extracted into the reaction device through the sampling device, and the mixed sample liquid is extracted from the sample bottle on the sample device 3 and extracted into the reaction device for electrochemical reaction. The COD is detected based on the electrochemical method, without the use of chemical reagents, without polluting the environment and harmless to the human body. And the whole process is based on the coordinated use of the sample device 3 and the sampling device, with a high degree of automation and high measurement accuracy. In addition, the rotation angle of the sample tray 312 is more accurate through the precise subdivision of the turntable 311, and the sample fixing plate 313 is conducive to the stable placement of the sample bottle.

[0056] According to some embodiments of the present application, optionally, Figure 6As shown, the sample disk 312 is provided with more than two sample placement holes 3121 along its circumference, and the sample fixing plate 313 is provided with more than two sample fixing holes 3131 at positions corresponding to the sample placement holes 3121 .

[0057] According to some embodiments of the present application, optionally, Figure 7 As shown, the sample rotating assembly 31 further includes a positioning pin 314 , and the middle portion of the sample fixing plate 313 is connected to the middle portion of the sample tray 312 via the positioning pin 314 .

[0058] In this way, the sample placement hole 3121 can facilitate the insertion of the sample bottle, thereby facilitating installation and fixation. Optionally, the sample plate 312 has two circles of sample placement holes 3121 along the circumference of the device, and the sample fixing plate 313 has two circles of sample fixing holes 3131 at corresponding positions to support batch testing of samples. In addition, the positioning pin 314 is mainly used to determine the relative position between the two parts and ensure that they remain stable during movement or force.

[0059] According to some embodiments of the present application, optionally, Figure 3 and Figure 8 As shown, the sampling device includes an electrolyte sampling device 4 and a sample liquid sampling device 5; the electrolyte sampling device 4 is installed on the back of the sampling platform 10, and the electrolyte sampling device 4 is used to extract the electrolyte in the external electrolysis barrel to the reaction device through the third pipeline module; the sample liquid sampling device 5 is installed on the front of the sampling platform 10, and the sampling end of the sample liquid sampling device 5 moves along the first direction a and / or the second direction b, so that the sampling end of the sample liquid sampling device 5 extracts the mixed sample liquid from the sample bottle on the sample device 3 into the reaction device for electrochemical reaction.

[0060] In this way, the electrolyte in the external electrolytic barrel can be extracted into the reaction device through the electrolyte sampling device 4, and the mixed sample liquid can be extracted from the sample bottle on the sample device 3 through the sample liquid sampling device 5 and extracted into the reaction device for electrochemical reaction. The two links are operated separately, which is convenient for parameter adjustment and separate operation.

[0061] According to some embodiments of the present application, optionally, Figure 3 and Figure 4As shown, the sample liquid sampling device 5 includes two sampling mechanisms 51, each sampling mechanism 51 includes a lateral moving component 511, a longitudinal moving component 512 and a sample liquid sampler 513; the longitudinal moving component 512 is slidably installed on the lateral moving component 511, and the sample liquid sampler 513 is installed on the longitudinal moving component 512, and the extraction end of the sample liquid sampler 513 is aligned with the sample device 3; the lateral moving component 511 is used to drive the longitudinal moving component 512 to move along a first direction a, and the longitudinal moving component 512 is used to drive the sample liquid sampler 513 to move along a second direction b, so that the extraction end of the sample liquid sampler 513 extracts the mixed sample liquid from the sample bottle on the sample device 3 to the reactor 21 and an electrochemical reaction occurs in the reactor 21.

[0062] In this way, the two sampling mechanisms 51 have the same structure but different installation positions. One of the sampling mechanisms 51 is arranged near the needle washer 33, which can wash the needle through the needle washer 33 and extract the pure water in the needle washer 33 into the sample bottle above the sample rotating component 31, which is convenient for subsequent dilution. The other sampling mechanism 51 is close to the needle washer 33 and the sewage discharger 34, which washes the needle through the needle washer 33 and discharges the washed sewage through the sewage discharger 34. After that, the sampling mechanism 51 extracts the stock solution in the sample bottle containing the stock solution into the sample bottle containing pure water under the action of the lateral moving component 511 and the longitudinal moving component 512, and repeats it many times until it is evenly mixed and then extracted into the reactor 21, and an electrochemical reaction occurs in the reactor 21 for detection.

[0063] According to some embodiments of the present application, optionally, Figure 5 As shown, the transverse moving component 511 includes a transverse moving drive unit 5111, a transverse slide rail 5112 and a transverse slider 5113, and the longitudinal moving component 512 includes a longitudinal moving drive unit 5121 and a longitudinal slide rail 5122; the output end of the transverse moving drive unit 5111 is connected to the transverse slide rail 5112, the longitudinal slide rail 5122 slides on the transverse slide rail 5112 through the transverse slider 5113, the output end of the longitudinal moving drive unit 5121 is connected to the longitudinal slide rail 5122, the sample liquid sampler 513 is installed on the longitudinal slide rail 5122, the transverse moving drive unit 5111 is used to drive the transverse slide rail 5112 to move along the first direction a, and the longitudinal moving drive unit 5121 is used to drive the sample liquid sampler 513 to move along the second direction b.

[0064] In this way, the transverse movement driving unit 5111 and the longitudinal movement driving unit 5121 can be motors. Under the action of the transverse movement driving unit 5111, the transverse slide rail 5112 is driven to move along the first direction a, so that the longitudinal movement component 512 can move along the first direction a. The longitudinal movement driving unit 5121 can drive the sample liquid sampler 513 to move along the second direction b, thereby realizing the movement of the sample liquid sampler 513 along the first direction a and / or the second direction b.

[0065] According to some embodiments of the present application, optionally, Figure 6 As shown, the sample device 3 also includes a diluter 32, a needle washer 33 and a drain 34. The diluter 32 is installed on one side of the sample tray 312, and the needle washer 33 and the drain 34 are installed on the other side of the sample tray 312; a sampling mechanism 51 close to one side of the diluter 32 washes the needle through the needle washer 33 and draws pure water from an external pure water bucket into an empty sample bottle, and another sampling mechanism 51 close to one side of the needle washer 33 washes the needle through the needle washer 33 and discharges the cleaned waste water through the drain 34.

[0066] In this way, the diluter 32 can be used to clean the sampling mechanism 51 near it and to dilute the stock solution later. Specifically, the sampling mechanism 51 on the side close to the diluter 32 is first cleaned (the sample liquid sampler 513 of the sampling mechanism 51 is first moved to the diluter 32 to extract a certain amount of pure water, and then returned to the diluter 32. Before the sample liquid sampler 513 of the sampling mechanism 51 formally extracts, the pure water in the diluter 32 will be discharged to the external waste water bucket, and then the pure water in the external pure water bucket will be re-extracted to the diluter 32). After that, the sample liquid sampler 513 of the sampling mechanism 51 starts the extraction work and injects the pure water extracted from the diluter 32 into the empty sample bottle. The needle washer 33 can be used to clean the sampling mechanism 51 near it. Specifically, the sample liquid sampler 513 of the sampling mechanism 51 is first moved to the needle washer 33 to extract a certain amount of pure water, and then extracted to the sewage discharger 34.

[0067] According to some embodiments of the present application, optionally, Figure 8 and Fig. 9 As shown, the electrolyte sampling device 4 includes an electrolyte moving component 41 and an electrolyte sampler 42. The electrolyte sampler 42 is installed on the electrolyte moving component 41. The extraction end of the electrolyte sampler 42 is aligned with the external electrolytic barrel. The electrolyte moving component 41 is used to drive the electrolyte sampler 42 to move along the second direction b so that the extraction end of the electrolyte sampler 42 extracts electrolyte from the external electrolytic barrel to the reaction device.

[0068] In this way, the electrolyte moving assembly 41 can drive the electrolyte sampler 42 to move along the second direction b to extract electrolyte from the external electrolytic barrel. Afterwards, the electrolyte sampler 42 extracts the electrolyte to the reaction device.

[0069] According to some embodiments of the present application, optionally, Fig. 9 As shown, the electrolyte moving component 41 includes an electrolyte moving drive unit 411, an electrolyte moving slide rail 412, an electrolyte moving slider 413, a guide rail fixing plate 414 and an electrolyte fixing plate 415; the output end of the electrolyte moving drive unit 411 is connected to the electrolyte moving slide rail 412, the extraction needle of the electrolyte sampler 42 slides on the electrolyte moving slide rail 412 through the electrolyte moving slider 413, the guide rail fixing plate 414 is installed above the electrolyte moving slide rail 412, the syringe of the electrolyte sampler 42 is fixedly installed between the guide rail fixing plate 414 and the electrolyte fixing plate 415, the electrolyte fixing plate 415 is installed above the guide rail fixing plate 414, and a groove is opened on the electrolyte fixing plate 415, and the extraction end of the extraction needle of the electrolyte sampler 42 protrudes from the groove.

[0070] In this way, the syringe of the electrolyte sampler 42 can be fixed by the guide rail fixing plate 414 and the electrolyte fixing plate 415, and an injection needle is movably connected to the syringe, and the movable end of the injection needle is connected to the electrolyte moving slider 413. Therefore, under the action of the electrolyte moving drive unit 411, it can move along the electrolyte moving slide rail 412, so that the extraction end of the injection needle moves along the second direction b to extract electrolyte.

[0071] According to some embodiments of the present application, optionally, Figure 6 As shown, the sample device 3 also includes an injector 35, which is installed on the sample platform 11. The injector 35 is connected to the reactor 21. The sample liquid sampling device 5 extracts the mixed sample liquid from the sample bottle on the sample device 3 into the reactor 21 through the injector 35 to cause an electrochemical reaction.

[0072] In this way, since the reactor 21 is not installed within the moving range of the sample liquid sampling device 5, an injector 35 is provided. On the one hand, the injector 35 is within the moving range of the sample liquid sampling device 5, and on the other hand, the injector 35 is connected to the reactor 21. Therefore, the sample liquid sampling device 5 extracts the mixed sample liquid from the sample bottle on the sample device 3 into the injector 35, which can flow to the reactor 21 and undergo an electrochemical reaction in the reactor 21.

[0073] According to some embodiments of the present application, optionally, Figure 1 and Figure 2 As shown, a data transmission port 19 is disposed on the front of the cabinet 1 , and a power interface 17 and a power button 18 are disposed on the side of the cabinet 1 .

[0074] Optionally, the cabinet 1 further includes a display 16, and the display 16 is installed on the front side of the control cabinet.

[0075] Thus, the external storage device can be connected to the water quality COD detection system 100 for facilitating sample fixation through the data transmission port 19. For example, the external storage device can be set as a USB flash drive, and after the test is completed, the USB flash drive is inserted into the data transmission port 19 for data storage.

[0076] The detection method of the water quality COD detection system 100 which is convenient for sample fixation is:

[0077] First, the water quality COD detection system 100 with an exhaust structure is calibrated; the specific calibration process is: connecting the power interface 17 and starting the power button 18. The sample liquid sampling device 5 is calibrated, that is, the transverse slide rail 5112 close to the diluter 32 is reset, reset-diluter 32, diluter 32-inner circle of sample tray 312, inner circle of sample tray 312-diluter 32, diluter 32-outer circle of sample tray 312; the transverse slide rail 5112 close to the needle washer 33 is reset, reset-drainer 34, drainer 34-needle washer 33, needle washer 33-drainer 34, drainer 34 inner circle of sample tray 312, inner circle of sample tray 312-injector 35, injector 35-drainer 34, drainer 34-outer circle of sample tray 312, outer circle of sample tray 312-injector 35 to ensure that the sample liquid sampling device 5 is at the center of the above-mentioned devices each time it moves. Among them, the diluter 32, the needle washer 33 and the drain 34 are reset according to the angle, and an initial angle is set, which can ensure that the sampler, the needle washer 33 and the drain 34 are at the same horizontal position, and reset and rotate according to this initial angle. Afterwards, the moving distance of the longitudinal slide rail 5122 of the sample liquid sampling device 5 is calibrated, that is, the distance range of the sample liquid sampler 513 to the diluter 32, the sample tray 312, the needle washer 33, the drain 34 and the sampler 35 is calibrated to avoid excessive downward movement of the extraction end of the sample liquid sampler 513, resulting in damage.

[0078] Secondly, the parameters of the water quality COD detection system 100 with an exhaust structure are set; the specific parameters are set as follows: the reset speed of the electrolyte sampling device 4 and the sample liquid sampling device 5, the pumping speed of the electrolyte, the push speed and the extraction amount of the electrolyte, etc. The above parameters can be specifically analyzed according to the specific experimental content. Among them, the dilution concentration and dilution amount of COD can also be determined first. Secondly, if there is no problem of sample dilution, the relevant parameter settings of the sampling mechanism 51 close to the diluter 32 can be ignored, or its parameters can be adjusted to the minimum value to speed up the test time and progress. Then the rotation reset parameter setting of the sample disk 312 is performed. The rotation angle of the sample disk 312 must be guaranteed to be at the same horizontal position as the diluter 32, the needle washer 33, the sewage discharger 34 and the sampler 35. Once a deviation occurs, it will cause the sample liquid sampling device 5 to collide with the sample fixing plate 313 when diluting and extracting the detection liquid, resulting in damage to the extraction end of the sample liquid sampling device 5.

[0079] Once again, the operator clicks the start button on the display 16, the electrolyte moving slide rail 412 runs, and the electrolyte sampler 42 extracts the electrolyte to the reactor 21. After the electrolyte flows to the reactor 21, the operator clicks the electrochemical workstation 22 start button on the display 16, and after the current baseline is stable, the operator clicks the detection button on the display 16 to drain the pure water in the diluter 32 and the needle washer 33 and the sewage in the drain 34. After that, new pure water is extracted into the diluter 32 and the needle washer 33.

[0080] From this time, at least two sample bottles are placed on the side of the sample rotating assembly 31 close to the diluter 32, one of which is an empty sample bottle and the other is a stock solution sample bottle. Determine whether the sample is diluted according to the actual situation. When it is determined that the sample needs to be diluted, the sampling mechanism 51 on the side close to the diluter 32 first performs the injection sampler cleaning operation (the sample liquid sampler 513 of the sampling mechanism 51 first moves to the diluter 32 to extract a certain amount of pure water, and then returns to the diluter 32. Before the sample liquid sampler 513 of the sampling mechanism 51 formally extracts, the pure water in the diluter 32 will be discharged, and then new pure water will be re-extracted to the diluter 32.) After that, the sample liquid sampler 513 of the sampling mechanism 51 starts the extraction work, and the pure water extracted from the diluter 32 is injected into the empty sample bottle. After the extraction, the sampling mechanism 51 is reset.

[0081] Afterwards, the sample disk 312 rotates under the action of the precision subdivision turntable 311, and the sample bottle to be tested is rotated to the side close to the needle washer 33. The sampling mechanism 51 on the side close to the needle washer 33 first performs a cleaning operation (the sample liquid sampler 513 of the sampling mechanism 51 is first moved to the needle washer 33 to extract a certain amount of pure water, and then extracted to the drain 34), and then the sample stock solution is extracted for rinsing, and the stock solution in the stock liquid sample bottle is extracted as needed into an empty sample bottle injected with pure water. After repeated injections until the solution is evenly mixed, the sampling mechanism 51 extracts the mixed COD detection solution in the sample bottle and extracts it into the upper injection port of the injector 35 to start sampling. The sample liquid flows to the reactor 21 through the injector 35, and the COD sample liquid undergoes an electrochemical reaction in the reactor 21, and the generated current response is displayed on the display 16 interface. Wherein, during the detection process, each time a sample is tested, the sampling mechanism 51 will perform a cleaning operation, and at the same time, the solution in the diluter 32, the needle washer 33 and the drain 34 will be discharged. Finally, the stop button on the display 16 is pressed to end the test.

[0082] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A water quality COD detection system that is convenient for sample fixation, characterized in that: include: A cabinet body, wherein a sampling platform and a sample platform are arranged in the cabinet body, and the lower end of the sampling platform is connected to the sample platform; A reaction device, wherein the reaction device is installed in the cabinet; A sample device, the sample device is installed on the sample platform, the sample device includes a sample rotation assembly, the sample rotation assembly includes a precision subdivision turntable, a sample tray and a sample fixing plate, the sample tray is installed on the precision subdivision turntable, the sample fixing plate is installed on the sample tray, the sample fixing plate cooperates with the sample tray to install and fix more than two sample bottles, and the precision subdivision turntable is used to drive the sample tray to rotate; A sampling device is installed on the sampling platform, and is used to extract the electrolyte in the external electrolytic barrel into the reaction device, and to extract the mixed sample liquid from the sample bottle on the sampling device into the reaction device for electrochemical reaction.

2. The water quality COD detection system for facilitating sample fixation according to claim 1 is characterized in that: The sample disc is provided with more than two sample placement holes along its circumference, and the sample fixing plate is provided with more than two sample fixing holes at positions corresponding to the sample placement holes.

3. The water quality COD detection system for facilitating sample fixation according to claim 2 is characterized in that: The sample rotating assembly also includes a positioning pin, and the middle part of the sample fixing plate is connected to the middle part of the sample tray through the positioning pin.

4. The water quality COD detection system for facilitating sample fixation according to claim 1 is characterized in that: The sampling device comprises an electrolyte sampling device and a sample liquid sampling device; The electrolyte sampling device is installed on the back of the sampling platform, and the electrolyte sampling device is used to extract the electrolyte in the external electrolysis barrel to the reaction device through the third pipeline module; The sample liquid sampling device is installed on the front side of the sampling platform, and the sampling end of the sample liquid sampling device moves along the first direction and / or the second direction, so that the sampling end of the sample liquid sampling device extracts the mixed sample liquid from the sample bottle on the sample device and extracts it into the reaction device for electrochemical reaction.

5. The water quality COD detection system for facilitating sample fixation according to claim 4 is characterized in that: The sample liquid sampling device comprises two sampling mechanisms, each of which comprises a transverse moving component, a longitudinal moving component and a sample liquid sampler; The longitudinal moving component is slidably mounted on the transverse moving component, the sample liquid sampler is mounted on the longitudinal moving component, the sampling end of the sample liquid sampler is aligned with the sample device, the transverse moving component is used to drive the longitudinal moving component to move along a first direction, and the longitudinal moving component is used to drive the sample liquid sampler to move along a second direction, so that the sampling end of the sample liquid sampler extracts the mixed sample liquid from the sample bottle on the sample device into the reaction device for electrochemical reaction.

6. The water quality COD detection system for facilitating sample fixation according to claim 5 is characterized in that: The transverse movement assembly includes a transverse movement driving unit, a transverse slide rail and a transverse slider, and the longitudinal movement assembly includes a longitudinal movement driving unit and a longitudinal slide rail; The output end of the transverse movement driving unit is connected to the transverse slide rail, the longitudinal slide rail slides on the transverse slide rail through the transverse slider, the output end of the longitudinal movement driving unit is connected to the longitudinal slide rail, the sample liquid sampler is installed on the longitudinal slide rail, the transverse movement driving unit is used to drive the transverse slide rail to move in a first direction, and the longitudinal movement driving unit is used to drive the sample liquid sampler to move in a second direction.

7. The water quality COD detection system for facilitating sample fixation according to claim 5 is characterized in that: The sample device further comprises a diluter, a needle washer and a drainer, wherein the diluter is mounted on one side of the sample tray, and the needle washer and the drainer are mounted on the other side of the sample tray; One sampling mechanism close to the diluter washes the needle through the needle washer and draws pure water from the external pure water bucket into the empty sample bottle, and another sampling mechanism close to the needle washer washes the needle through the needle washer and discharges the cleaned waste water through the drain.

8. The water quality COD detection system for facilitating sample fixation according to claim 4 is characterized in that: The electrolyte sampling device includes an electrolyte moving component and an electrolyte sampler, wherein the electrolyte sampler is mounted on the electrolyte moving component, and the extraction end of the electrolyte sampler is aligned with the external electrolysis barrel. The electrolyte moving component is used to drive the electrolyte sampler to move along a second direction so that the extraction end of the electrolyte sampler extracts electrolyte from the external electrolysis barrel to the reaction device.

9. The water quality COD detection system for facilitating sample fixation according to claim 8, characterized in that: The electrolyte moving assembly includes an electrolyte moving drive unit, an electrolyte moving slide rail, an electrolyte moving slider, a guide rail fixing plate and an electrolyte fixing plate; The output end of the electrolyte moving drive unit is connected to the electrolyte moving slide rail, the extraction needle of the electrolyte sampler slides on the electrolyte moving slide rail through the electrolyte moving slider, the guide rail fixing plate is installed above the electrolyte moving slide rail, the syringe of the electrolyte sampler is fixedly installed between the guide rail fixing plate and the electrolyte fixing plate, the electrolyte fixing plate is installed above the guide rail fixing plate, and a groove is opened on the electrolyte fixing plate, and the extraction end of the extraction needle of the electrolyte sampler protrudes from the groove.

10. The water quality COD detection system for facilitating sample fixation according to claim 1, characterized in that: The front of the cabinet is provided with a data transmission port, and the side of the cabinet is provided with a power interface and a power button.

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