Verification and calibration device for water quality analyzer

Abstract

The utility model discloses a verification and calibration device for a water quality analyzer, which belongs to the field of dissolved oxygen analysis, solves the problems of dispersed detection steps and inconvenience in carrying of the conventional detection device for the water quality analyzer, and comprises a mounting seat, a heat preservation shell, a water inlet component and an analyzer electrode. According to the water quality analyzer, oxygen in nitrogen with different concentrations can be input into the heat preservation shell, the dissolved oxygen concentration of distilled water is balanced, the water quality analyzer is used for detecting the detection accuracy of the water quality analyzer, follow-up calibration and adjustment are facilitated, in the aeration process, the stirring assembly can stir liquid in the heat preservation shell, and the aeration efficiency is improved. According to the device, the mixing speed of gas and distilled water is increased, the overall working efficiency of the device is improved, the device is automatic and integrated in use, the operation steps of the device in use are simplified, the device can move rapidly and stably through universal self-locking wheels installed at the bottom end, and the working quality of the device is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of dissolved oxygen analysis, specifically relating to a calibration device for a water quality analyzer. Background Technology

[0002] Dissolved oxygen (DO) is a measure of a water body's self-purification capacity. It refers to the amount of oxygen dissolved in water, usually expressed as DO, in milligrams of oxygen per liter of water. The amount of dissolved oxygen in water is an indicator of a water body's self-purification capacity, and it is closely related to the partial pressure of oxygen in the air, atmospheric pressure, water temperature, and water quality. Dissolved oxygen is also an important indicator in fish and shrimp farming, wastewater treatment, and environmental emergency monitoring, and has significant applications in industry, environmental protection, and sanitation. Therefore, monitoring dissolved oxygen levels is crucial, and online dissolved oxygen water quality analyzers have become standard equipment for environmental protection departments at all levels.

[0003] Water quality analyzers can reliably analyze and verify the amount of dissolved oxygen in water. However, after a long period of time, the water quality analyzer needs to be calibrated and verified by staff to ensure the accuracy of the equipment during operation. When calibrating water quality analyzers, the existing verification steps are too scattered, inconvenient to operate during use, and not easy to carry to the site, which affects the verification and calibration efficiency of water quality analyzers and reduces the overall working efficiency of the equipment. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0006] A water quality analyzer calibration device includes a mounting base, an insulated shell, a water inlet assembly, and analyzer electrodes. The insulated shell for storing distilled water is fixedly mounted on the upper surface of the mounting base. The water inlet assembly for drawing distilled water is connected to the side of the insulated shell. Analyzer electrodes connected to the water quality analyzer are disposed on the insulated shell. An aeration mechanism for introducing oxygen gas from nitrogen of different concentrations into the interior of the insulated shell is installed on the upper surface of the insulated shell. The aeration mechanism includes an air supply assembly, a bubbler, a sealing shell, and a matching assembly. The air supply assembly is installed on the side of the insulated shell, the bubbler is installed on the upper surface of the insulated shell and is connected to the air supply assembly through a pipeline, the sealing shell is fixedly mounted on the upper surface of the insulated shell, and the matching assembly for conveying gas is installed inside the insulated shell.

[0007] As a preferred technical solution of this utility model, the cooperating components include a drive motor, a gas connecting rod, and a linkage rod. The gas connecting rod is rotatably installed inside the sealed housing, and multiple gas conveying grooves are opened inside the gas connecting rod. The linkage rod is fixedly installed at the end of the gas connecting rod and is rotatably connected to the sealed housing. Both the linkage rod and the gas connecting rod are hollow tubular structures. The drive motor is installed on the surface of the sealed housing, and the output end of the drive motor is fixedly connected to the gas connecting rod.

[0008] As a preferred technical solution of this utility model, the cooperating component further includes a stirring component, and the outer surface of the linkage rod is equipped with a stirring component to agitate the liquid inside the heat preservation shell and accelerate the mixing of gas and distilled water.

[0009] As a preferred technical solution of this utility model, the stirring assembly consists of a rotating plate, a stirring rod, and a stirring end. The rotating plate is fixedly installed on the outside of the linkage rod, the stirring rod is fixedly installed at equal intervals on the outside of the rotating plate, and the stirring end is fixedly installed on the end of the stirring rod. Multiple sets of circular slots are formed in the stirring end.

[0010] As a preferred technical solution of this utility model, the mating component further includes a gas output end, and the bottom end of the linkage rod is fixedly installed with a gas output end, and the gas output end has multiple sets of gas delivery slots equidistantly formed inside.

[0011] As a preferred technical solution of this utility model, the gas supply component includes a gas storage tank, a mounting bracket, a connecting pipe, and a multi-hole interface. The mounting bracket is equidistantly installed on the side of the insulation shell, and a total of three sets of mounting brackets are provided. The gas storage tank is fixed by the mounting bracket. The connecting pipe is installed at the gas outlet end of the gas storage tank. The ends of the three sets of connecting pipes are all equipped with multi-hole interfaces, and the multi-hole interfaces are connected to the sealing shell through pipes.

[0012] As a preferred embodiment of this utility model, the gas storage tank is provided in three sets, wherein the three sets of gas storage tanks store oxygen gas in nitrogen of different concentrations.

[0013] As a preferred technical solution of this utility model, the calibration device further includes a floating mechanism, which includes a floating top plate, a motor insertion slot, a shielding cover, and a rotating side frame. The floating top plate is disposed inside the insulation shell and floats on the surface of distilled water inside the insulation shell. The floating top plate has a motor insertion slot for connecting to the analyzer electrode. The rotating side frame is fixedly installed at the bottom of the floating top plate on the side of the motor insertion slot. A rotatable and repositionable shielding cover is installed on the side of the rotating side frame.

[0014] As a preferred technical solution of this utility model, the calibration device further includes a temperature detection element and an atmospheric pressure gauge. Both the temperature detection element and the atmospheric pressure gauge are installed on the upper surface of the insulation shell. The temperature detection element includes a mounting plate, a mounting base, and a thermometer. The mounting base is fixedly installed on the upper surface of the insulation shell, the mounting plate is threaded onto the top of the mounting base, and the thermometer is fixedly installed on the bottom of the mounting plate. The thermometer penetrates the mounting base and enters the interior of the insulation shell to contact the distilled water inside the insulation shell.

[0015] As a preferred embodiment of this utility model, the bottom of the mounting base is equipped with a rotatable universal self-locking wheel, and a push handle is fixedly installed on the side of the mounting base.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, by setting up an aeration mechanism, oxygen gas from nitrogen of different concentrations can be introduced into the heat-insulating shell, allowing the gas to mix thoroughly with distilled water and achieving a balance in the dissolved oxygen concentration of the distilled water. This balance is used to test the accuracy of the water quality analyzer, facilitating subsequent calibration and adjustment. During aeration, the stirring component can stir the liquid inside the heat-insulating shell, accelerating the mixing speed of the gas and distilled water and improving the overall working efficiency of the equipment. The equipment is automated and integrated, simplifying the operation steps. Furthermore, the equipment is equipped with universal self-locking wheels at the bottom, enabling rapid and stable movement and ensuring the quality of its operation. Attached Figure Description

[0018] Figure 1 This is a perspective view of the overall structure of this utility model.

[0019] Figure 2 This is a perspective view of the surface structure of the mounting base of this utility model.

[0020] Figure 3 This is a perspective view of the aeration mechanism structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the components used in this utility model.

[0022] Figure 5 This is an enlarged structural schematic diagram of the stirring component and the gas output end in this utility model.

[0023] Figure 6 This is a schematic diagram of the air delivery component in this utility model.

[0024] Figure 7 This is a schematic diagram of the temperature detection element and the floating mechanism in this utility model.

[0025] Figure 8 This is a schematic diagram of the floating mechanism in this utility model.

[0026] Figure 9 This is a schematic diagram of the temperature detection element and the atmospheric pressure gauge in this utility model.

[0027] The correspondence between the labels and component names in the attached figures is as follows:

[0028] 1. Mounting base; 2. Insulated shell; 3. Water inlet assembly; 4. Analyzer electrode; 5. Aeration mechanism; 51. Air supply assembly; 511. Gas storage tank; 512. Mounting bracket; 513. Connecting pipeline; 514. Multi-hole interface; 52. Bubble blower; 53. Sealing shell; 54. Matching assembly; 541. Drive motor; 542. Gas connecting rod; 543. Linkage rod; 544. Stirring assembly; 545. Gas output end; 6. Temperature detection element; 61. Mounting rotating plate; 62. Mounting base; 63. Thermometer; 7. Atmospheric bar gauge; 8. Floating mechanism; 81. Floating top plate; 82. Motor insertion slot; 83. Cover plate; 84. Rotating side frame. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0032] Depend on Figure 1 and Figure 2As shown, it is a schematic diagram of the structure of the verification and calibration device in this embodiment, including a mounting base 1, an insulation shell 2, a water inlet assembly 3, and an analyzer electrode 4. The insulation shell 2 for storing distilled water is fixedly installed on the upper surface of the mounting base 1. The water inlet assembly 3 for absorbing distilled water is connected to the side of the insulation shell 2. The analyzer electrode 4 connected to the water quality analyzer is provided on the insulation shell 2. An aeration mechanism 5 for inputting oxygen gas from nitrogen of different concentrations into the interior of the insulation shell 2 is installed on the upper surface of the insulation shell 2.

[0033] In operation, a measured amount of distilled water (2L) is introduced into the insulation shell 2 via the water inlet assembly 3. Then, oxygen gas from nitrogen is introduced into the insulation shell 2 via the aeration mechanism 5. The oxygen gas delivery rate needs to be controlled at 500 mL / min, with continuous aeration for at least 60 minutes to achieve dissolved oxygen equilibrium. Next, the analyzer electrode 4 is inserted into the insulation shell 2, bringing it into contact with the liquid inside. The accuracy of the water quality analyzer is determined based on the data measured by the analyzer electrode 4. Continuous aeration is required during calibration to ensure the stability of the equipment. Finally, the liquid inside the insulation shell 2 is discharged through the cooperation of the water inlet assembly 3 and the output pipe on the side of the mounting base 1. This achieves automated and integrated operation of the entire equipment, accelerating overall work efficiency and enabling efficient testing and calibration of the water quality analyzer.

[0034] From the appendix Figure 3 As shown, this is a schematic diagram of the aeration mechanism 5 in this embodiment. The aeration mechanism 5 includes an air supply component 51, a bubbler 52, a sealing shell 53, and a cooperating component 54. The air supply component 51 is installed on the side of the heat insulation shell 2, the bubbler 52 is installed on the upper surface of the heat insulation shell 2, and the bubbler 52 is connected to the air supply component 51 through a pipeline. The sealing shell 53 is fixedly installed on the upper surface of the heat insulation shell 2, and the cooperating component 54 for conveying gas is installed inside the heat insulation shell 2.

[0035] During operation, the oxygen gas stored in the nitrogen in the gas supply component 51 is introduced into the sealed housing 53 through the pipeline by the bubbler 52. Then, with the cooperation of the sealed housing 53 and the cooperating component 54, the gas is introduced into the heat insulation housing 2. The gas mixes with the distilled water in the heat insulation housing 2, so that the dissolved oxygen concentration in the distilled water reaches equilibrium. During the gas transportation process, the cooperating component 54 can stir the distilled water, which accelerates the mixing speed of distilled water and gas and ensures the stability of the equipment during operation.

[0036] From the appendix Figure 4As shown, this is a schematic diagram of the structure of the mating component 54 in this embodiment. The mating component 54 includes a drive motor 541, a gas connecting rod 542, and a linkage rod 543. The gas connecting rod 542 is rotatably installed inside the sealed housing 53, and multiple gas conveying grooves are formed inside the gas connecting rod 542. The linkage rod 543 is fixedly installed at the end of the gas connecting rod 542, and the linkage rod 543 is rotatably connected to the sealed housing 53. Both the linkage rod 543 and the gas connecting rod 542 are hollow tubular structures. The drive motor 541 is installed on the surface of the sealed housing 53, and the output end of the drive motor 541 is fixedly connected to the gas connecting rod 542.

[0037] During use, oxygen gas in nitrogen is introduced into the sealed housing 53 with the help of bubbler 52. Then, the oxygen gas in nitrogen passes through the conveying groove opened on the outside of the gas connecting rod 542 and enters the gas connecting rod 542. It then enters the distilled water inside the heat preservation housing 2 along the inner wall of the gas connecting rod 542 and the linkage rod 543, realizing the aeration operation of the distilled water and making the dissolved oxygen concentration in it reach equilibrium.

[0038] From the appendix Figure 5 As shown, it is a structural schematic diagram of the mating component 54 in this embodiment. The mating component 54 also includes a stirring component 544. The stirring component 544, which stirs the liquid inside the heat-insulating shell 2 and accelerates the mixing of gas and distilled water, is installed on the outer surface of the linkage rod 543.

[0039] During use, the stirring component 544 rotates synchronously with the output of the drive motor 541, stirring the liquid inside the insulation shell 2, which facilitates the mixing of oxygen gas in nitrogen transported inside the linkage rod 543 with distilled water, and accelerates the balancing speed of dissolved oxygen concentration in distilled water.

[0040] From the appendix Figure 5 As shown, it is a structural schematic diagram of the mating component 54 in this embodiment. The stirring component 544 consists of a rotating plate, a stirring rod, and a stirring end. The rotating plate is fixedly installed on the outside of the linkage rod 543. The stirring rod is fixedly installed on the outside of the rotating plate at equal intervals. The stirring end is fixedly installed on the end of the stirring rod. Multiple sets of circular slots are opened in the stirring end.

[0041] During use, the rotating plate rotates synchronously with the rotating rod 543 as the linkage rod 543 rotates. At this time, the stirring rod and the stirring end stir the distilled water stored inside the heat preservation shell 2. During the stirring process, the multiple sets of holes and grooves opened in the stirring end are used to accelerate the mixing speed of gas and distilled water, ensuring the working efficiency of the equipment itself.

[0042] From the appendix Figure 5As shown, it is a structural schematic diagram of the mating component 54 in this embodiment. The mating component 54 also includes a gas output end 545. The gas output end 545 is fixedly installed at the bottom end of the linkage rod 543. The gas output end 545 has multiple sets of gas delivery slots equidistantly opened inside.

[0043] In use, the gas output end 545 is installed at the end of the linkage rod 543. The oxygen gas in the nitrogen is transported along the linkage rod 543 and then discharged through the gas delivery slot outside the gas output end 545. The gas mixes with the distilled water stored inside the heat preservation shell 2 to realize the aeration operation.

[0044] From the appendix Figure 6 As shown, this is a schematic diagram of the gas supply component 51 in this embodiment. The gas supply component 51 includes a gas storage tank 511, a mounting bracket 512, a connecting pipe 513, and a multi-hole interface 514. The mounting bracket 512 is equidistantly installed on the side of the insulation shell 2. There are three sets of mounting brackets 512. The gas storage tank 511 is fixed by the mounting bracket 512. The connecting pipe 513 is installed at the gas outlet end of the gas storage tank 511. The ends of the three sets of connecting pipes 513 are all equipped with multi-hole interfaces 514. The multi-hole interfaces 514 are connected to the sealing shell 53 through pipes.

[0045] During use, a gas storage tank 511 with the corresponding concentration of oxygen in nitrogen is selected according to the detection requirements. Then, through the cooperation of the connecting pipe 513 and the control valve installed on the outside of the connecting pipe 513, the gas is transported through the multi-hole interface 514 and introduced into the sealed shell 53. This facilitates the introduction of oxygen in nitrogen into the heat-insulating shell 2, aerating the distilled water stored inside the heat-insulating shell 2 and balancing the dissolved oxygen in the distilled water.

[0046] From the appendix Figure 6 As shown, it is a structural schematic diagram of the gas delivery component 51 in this embodiment. There are three sets of gas storage tanks 511, which are divided into three sets of gas storage tanks 511 storing oxygen gas in nitrogen with different concentrations.

[0047] In use, the three gas storage tanks 511 contain nitrogen-oxygen gas with concentrations of 0.05 mol / mol, 0.10 mol / mol, and 0.25 mol / mol, respectively. Then, these nitrogen-oxygen gas concentrations are introduced into distilled water. The analyzer electrode 4 is used to detect the saturation concentration of nitrogen-oxygen gas in water at different temperatures and atmospheric pressures. This is used to determine the accuracy of the analyzer electrode 4's detection. The reference value for the saturation concentration in water can be converted using the formula: Cs = Cb × Cq / 20.94%, where Cs is the saturation concentration of nitrogen-oxygen gas in water (mg / L); Cb is the saturation concentration of oxygen in water calculated by looking up a table or interpolation (mg / L); Cq is the concentration of the nitrogen-oxygen gas standard substance; and 20.94% is the oxygen content in the air. These steps are used to accurately calculate the saturation concentration in water.

[0048] From the appendix Figure 7 and Figure 8 As shown, this is a structural schematic diagram of the floating mechanism 8 in this embodiment. The calibration device also includes the floating mechanism 8, which includes a floating top plate 81, a motor insertion slot 82, a shielding cover 83, and a rotating side frame 84. The floating top plate 81 is disposed inside the insulation shell 2 and floats on the surface of distilled water inside the insulation shell 2. The floating top plate 81 has a motor insertion slot 82 for connecting to the analyzer electrode 4. The rotating side frame 84 is fixedly installed at the bottom of the floating top plate 81 on the side of the motor insertion slot 82. A rotatable and repositionable shielding cover 83 is installed on the side of the rotating side frame 84.

[0049] During use, distilled water is introduced into the insulation shell 2. The floating top plate 81 floats on the surface of the distilled water due to its density and weight. When the gas output end 545 delivers gas and mixes with the distilled water, the floating top plate 81 causes the dissolved oxygen in the insulation shell 2 to quickly reach saturation, accelerating the liquid saturation rate and improving the overall working efficiency. At this time, the analyzer electrode 4 is inserted into the liquid in the insulation shell 2 through the motor insertion slot 82 to detect the dissolved oxygen value of the liquid. During the insertion of the analyzer electrode 4, the shielding cover 83 rotates and deflects axially along the rotating side frame 84 under the pressure of the analyzer electrode 4. The rotating side frame 84 is equipped with a torsion spring, which facilitates the quick reset of the shielding cover 83 and ensures the stability of the equipment during operation.

[0050] From the appendix Figure 7 and Figure 9As shown, this is a schematic diagram of the structure of the temperature detection element 6 and the atmospheric pressure gauge 7 in this embodiment. The calibration device also includes the temperature detection element 6 and the atmospheric pressure gauge 7. Both the temperature detection element 6 and the atmospheric pressure gauge 7 are installed on the upper surface of the insulation shell 2. The temperature detection element 6 includes a mounting plate 61, a mounting base 62 and a thermometer 63. The mounting base 62 is fixedly installed on the upper surface of the insulation shell 2. The mounting plate 61 is threaded onto the top of the mounting base 62. The thermometer 63 is fixedly installed on the bottom of the mounting plate 61, and the thermometer 63 penetrates the mounting base 62 and enters the interior of the insulation shell 2 to contact the distilled water inside the insulation shell 2.

[0051] During use, the atmospheric pressure gauge 7 is used to accurately detect the atmospheric pressure in the surrounding environment, while the temperature sensor 6 can detect the overall temperature of the distilled water. This facilitates accurate calculation of changes in atmospheric pressure and water temperature, reduces errors in the final detection data, and improves the accuracy of the equipment during operation. Furthermore, the atmospheric pressure gauge 7 and the temperature sensor 6 can be quickly removed from the surface of the insulation shell 2 during use, making it easy to calibrate the accuracy of the detection data from the atmospheric pressure gauge 7 and the temperature sensor 6.

[0052] From the appendix Figure 3 As shown, the bottom of the mounting base 1 is equipped with a rotatable universal self-locking wheel, and a push handle is fixedly installed on the side of the mounting base 1.

[0053] The use of omnidirectional self-locking wheels allows for flexible and safe movement of the equipment. The installation of the push handle further enhances the equipment's flexibility, making it easy for users to move the equipment to the target location. The equipment position can also be locked afterward to ensure stability during use.

[0054] Working Principle: During operation, the water quality analyzer calibration device uses the inlet component 3 to introduce a measured amount of distilled water (2L) into the insulation shell 2. Then, the aeration mechanism 5 introduces oxygen gas from nitrogen into the insulation shell 2. The floating top plate 81 floats on the surface of the distilled water due to its density and weight. Next, the bubbler 52 introduces the oxygen gas from nitrogen stored in the air supply component 51 into the sealed shell 53 through a pipeline. Depending on the testing requirements, a gas storage tank 511 with the corresponding concentration of oxygen gas from nitrogen is selected. Finally, through the connecting pipe 513 and the control valve installed outside the connecting pipe 513, the gas is introduced through a multi-port interface. 514 conveys gas into the sealed housing 53, facilitating the introduction of oxygen gas from nitrogen into the insulation housing 2. This aerates the distilled water stored inside the insulation housing 2, balancing the dissolved oxygen content. Then, with the cooperation of the sealed housing 53 and the mating assembly 54, the gas is introduced into the insulation housing 2, where it mixes with the distilled water, further balancing the dissolved oxygen concentration. During gas delivery, the rotating plate rotates synchronously with the linkage rod 543. At this time, the stirring rod and stirring end agitate the distilled water stored inside the insulation housing 2. During this agitation, the multiple sets of perforations in the stirring end accelerate the mixing of the gas and distilled water. When the gas output terminal 545 delivers gas mixed with distilled water, the floating top plate 81 rapidly saturates the dissolved oxygen in the insulation shell 2, accelerating the liquid saturation rate and ensuring the equipment's operating efficiency. During gas delivery, the oxygen delivery rate in the nitrogen mixture needs to be controlled at 500 mL / min, with continuous aeration for at least 60 minutes to achieve dissolved oxygen concentration equilibrium. Then, the analyzer electrode 4 of the water quality analyzer is inserted into the insulation shell 2, bringing it into contact with the liquid inside. The accuracy of the water quality analyzer is determined based on the data detected by the analyzer electrode 4. Continuous aeration is required during calibration to ensure the stability of the equipment during operation. Finally, the water is supplied through the inlet assembly 3 and... With the cooperation of the side output pipe of the mounting base 1, the liquid inside the insulation shell 2 is discharged, realizing the overall automation and integrated operation of the equipment. During use, the equipment uses the atmospheric pressure gauge 7 to accurately detect the atmospheric pressure in the surrounding environment, while the temperature detection element 6 can detect the overall temperature of the distilled water, which facilitates the accurate calculation of changes in atmospheric pressure and water temperature, reduces the error of the final detection data, and improves the accuracy of the equipment operation. In addition, during use, the atmospheric pressure gauge 7 and the temperature detection element 6 can be quickly removed from the surface of the insulation shell 2, which facilitates the calibration of the accuracy of the detection data of the atmospheric pressure gauge 7 and the temperature detection element 6, speeds up the overall work efficiency, and efficiently detects and calibrates the water quality analyzer.

[0055] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A calibration device for a water quality analyzer, comprising a mounting base (1), an insulating shell (2), a water inlet assembly (3), and an analyzer electrode (4), wherein the insulating shell (2) for storing distilled water is fixedly mounted on the upper surface of the mounting base (1), the water inlet assembly (3) for absorbing distilled water is connected to the side of the insulating shell (2), and the analyzer electrode (4) connected to the water quality analyzer is disposed on the insulating shell (2), characterized in that: An aeration mechanism (5) for introducing nitrogen and oxygen gas of different concentrations into the interior of the insulation shell (2) is installed on the upper surface of the insulation shell (2). The aeration mechanism (5) includes an air supply component (51), a bubbler (52), a sealing shell (53), and a cooperating component (54). The air supply component (51) is installed on the side of the insulation shell (2), the bubbler (52) is installed on the upper surface of the insulation shell (2), and the bubbler (52) is connected to the air supply component (51) through a pipeline. The sealing shell (53) is fixedly installed on the upper surface of the insulation shell (2), and the cooperating component (54) for conveying gas is installed inside the insulation shell (2).

2. The water quality analyzer calibration device according to claim 1, characterized in that: The cooperating component (54) includes a drive motor (541), a gas connecting rod (542), and a linkage rod (543). The gas connecting rod (542) is rotatably installed inside the sealed housing (53), and multiple gas conveying grooves are opened inside the gas connecting rod (542). The linkage rod (543) is fixedly installed at the end of the gas connecting rod (542), and the linkage rod (543) is rotatably connected to the sealed housing (53). Both the linkage rod (543) and the gas connecting rod (542) are hollow tubular structures. The drive motor (541) is installed on the surface of the sealed housing (53), and the output end of the drive motor (541) is fixedly connected to the gas connecting rod (542).

3. The water quality analyzer calibration device according to claim 2, characterized in that: The cooperating component (54) also includes a stirring component (544), on which the stirring component (544) is installed on the outer surface of the linkage rod (543) to stir the liquid inside the heat-insulating shell (2) and accelerate the mixing of gas and distilled water.

4. The water quality analyzer calibration device according to claim 3, characterized in that: The stirring assembly (544) consists of a rotating plate, a stirring rod, and a stirring end. The rotating plate is fixedly installed outside the linkage rod (543), the stirring rod is fixedly installed at equal intervals outside the rotating plate, and the stirring end is fixedly installed at the end of the stirring rod. Multiple sets of circular holes and grooves are opened in the stirring end.

5. The water quality analyzer calibration device according to claim 4, characterized in that: The mating assembly (54) also includes a gas output end (545). The bottom end of the linkage rod (543) is fixedly installed with a gas output end (545). The gas output end (545) has multiple sets of gas delivery slots equidistantly opened inside.

6. The water quality analyzer calibration device according to claim 1, characterized in that: The gas delivery assembly (51) includes a gas storage tank (511), a mounting bracket (512), a connecting pipe (513), and a multi-hole interface (514). The mounting bracket (512) is equidistantly installed on the side of the insulation shell (2). There are three sets of mounting brackets (512). The gas storage tank (511) is fixed by the mounting bracket (512). The connecting pipe (513) is installed at the gas outlet end of the gas storage tank (511). The ends of the three sets of connecting pipes (513) are all equipped with multi-hole interfaces (514). The multi-hole interfaces (514) are connected to the sealing shell (53) through pipes.

7. The water quality analyzer calibration device according to claim 6, characterized in that: There are three sets of gas storage tanks (511), which are divided into three groups that store oxygen gas in nitrogen with different concentrations.

8. The water quality analyzer calibration device according to claim 1, characterized in that: The calibration device also includes a floating mechanism (8), which includes a floating top plate (81), a motor insertion slot (82), a shielding cover (83), and a rotating side frame (84). The floating top plate (81) is set inside the insulation shell (2) and floats on the surface of distilled water inside the insulation shell (2). The floating top plate (81) has a motor insertion slot (82) for connecting to the analyzer electrode (4). The rotating side frame (84) is fixedly installed on the bottom of the floating top plate (81) on the side of the motor insertion slot (82). The rotating side frame (84) has a rotatable and repositionable shielding cover (83) installed on the side of the rotating side frame (84).

9. The water quality analyzer calibration device according to claim 1, characterized in that: The calibration device also includes a temperature sensor (6) and an atmospheric pressure gauge (7). The temperature sensor (6) and the atmospheric pressure gauge (7) are both installed on the upper surface of the insulation shell (2). The temperature sensor (6) includes a mounting plate (61), a mounting base (62), and a thermometer (63). The mounting base (62) is fixedly installed on the upper surface of the insulation shell (2). The mounting plate (61) is threaded onto the top of the mounting base (62). The thermometer (63) is fixedly installed on the bottom of the mounting plate (61). The thermometer (63) penetrates the mounting base (62) and enters the interior of the insulation shell (2) to contact the distilled water inside the insulation shell (2).

10. The water quality analyzer calibration device according to claim 1, characterized in that: The mounting base (1) is equipped with a rotatable universal self-locking wheel at its bottom end, and a push handle is fixedly installed on the side of the mounting base (1).

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