Ammonia nitrogen analyzer and analysis method

Abstract

The application discloses an ammonia nitrogen analyzer and an analysis method, which comprise a machine body, a plurality of sample placing positions are formed on the machine body, and a plurality of sample cups are arranged on the plurality of sample placing positions; a liquid adding and color developing position is formed on the machine body, and a stirring assembly is arranged at the liquid adding and color developing position; a liquid adding assembly is arranged at the liquid adding and color developing position; a plurality of filtering and constant volume positions are formed on the machine body; a constant volume component is arranged at the filtering and constant volume positions; a filter component is detachably arranged in the constant volume component; a three-dimensional mechanical arm is assembled to the machine body and can move in three directions; a sampling component is arranged on the three-dimensional mechanical arm and can move under the driving of the three-dimensional mechanical arm; and a grabbing component is arranged on the three-dimensional mechanical arm. The ammonia nitrogen analyzer realizes full-automatic detection of ammonia nitrogen analysis and detection, and improves the detection efficiency and the detection precision.

Description

Technical Field

[0001] This invention belongs to the field of water quality testing and analysis technology, specifically, it relates to an ammonia nitrogen analyzer and its analysis method. Background Technology

[0002] Currently, the main methods for determining ammonia nitrogen include Nessler's reagent colorimetric method, salicylic acid colorimetric method, alkali neutralization titration method, and ion electrode method. Generally, laboratories determine ammonia nitrogen according to the method specified in the national standard HJ 535-2009, the Nessler's reagent colorimetric method. However, traditional manual ammonia nitrogen determination methods are extremely time-consuming and labor-intensive, requiring manual operation and control in the laboratory. These methods demand high precision from operators, and the reagents pose certain risks. The overall efficiency is low and can no longer meet the needs of today's society. Therefore, there is an urgent need for a fully automated ammonia nitrogen determination system and method that can solve the problems of low efficiency and low accuracy in traditional manual ammonia nitrogen determination processes, reduce operator contact with reagents, and increase operational safety.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] This invention addresses the aforementioned technical problems in the detection of battery electrodes in existing technologies by proposing an ammonia nitrogen analyzer that achieves fully automated detection of ammonia nitrogen, thereby improving detection efficiency and accuracy.

[0005] To achieve the above-mentioned invention / design objectives, the present invention adopts the following technical solution:

[0006] An ammonia nitrogen analyzer includes:

[0007] The body has multiple sample placement positions formed on the body, and multiple sample cups are arranged on the multiple sample placement positions;

[0008] A liquid addition and color development point is formed on the machine body, and a stirring component is provided at the liquid addition and color development point for stirring;

[0009] The liquid addition assembly, located at the liquid addition and color development position, is configured to draw the corresponding Class I or Class II reagent into the container transported to the liquid addition and color development position;

[0010] Filter positioning positions are formed on the machine body, and multiple positions are set.

[0011] Multiple filter positioning devices are provided, with their number at least matching the number of sample positions, including:

[0012] A volume-regulating component is disposed at the filter volume-regulating position;

[0013] And a detachable filter element disposed within the volume-regulating component;

[0014] The three-dimensional robotic arm, assembled onto the machine body, can move in three directions;

[0015] The sampling component, mounted on the three-dimensional robotic arm, can move under the drive of the three-dimensional robotic arm to extract samples;

[0016] The gripping component, mounted on the three-dimensional robotic arm, can move under the drive of the three-dimensional robotic arm and is used to grip and transfer sample cups, filter components, or volume-fixing components.

[0017] In this process, after the sample in the sample cup has flocculated and precipitated, the three-dimensional robotic arm is configured to: grasp the filter device with the gripping component to separate it from the volume-fixing component;

[0018] The filter device is pressed into the sample cup from top to bottom so that the clear liquid in the sample cup is immersed into the filter element and filtered by the filter plate arranged in the filter element;

[0019] Grab the volume-fixing component and place it at the liquid addition and color development point;

[0020] It moves to the filter element, moves downwards and extracts a quantitative amount of the filtered clarified sample through the sampling element and transfers it into the volume-fixing element to react with the second type of reagent added into the volume-fixing element by the liquid addition component.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are:

[0022] When performing ammonia nitrogen analysis, the ammonia nitrogen analyzer uses a three-dimensional robotic arm to sequentially move multiple sample cups to the liquid addition and color development positions for liquid addition. During filtration, the three-dimensional robotic arm presses the filter component into the corresponding sample cup for immersion filtration. After filtration, when color development is required, the three-dimensional robotic arm transfers multiple volume-fixing components to the liquid addition and color development positions. The liquid addition component draws the clear solution from its corresponding sample cup for color development. The entire liquid addition, extraction, filtration, and color development operation is fully automated, requiring no manual intervention. This improves analytical efficiency and accuracy, enabling the analysis of large batches of samples.

[0023] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the ammonia nitrogen analyzer proposed in this invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the filtration and volume control device of an embodiment of the ammonia nitrogen analyzer proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the positioning component of an embodiment of the ammonia nitrogen analyzer proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the filter component of an embodiment of the ammonia nitrogen analyzer proposed in this invention.

[0029] In the diagram, 100 is the sample placement position; 200 is the liquid addition and color development position; 300 is the liquid addition assembly; 400 is the filtration and volume adjustment position; 500 is the volume adjustment component; 510 is the insertion cavity; 600 is the filter component; 610 is the opening; 620 is the filter body; 630 is the filter base; 700 is the three-dimensional robotic arm; 710 is the sampling component; 720 is the gripping component; and 800 is the cleaning position. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In some embodiments of this application, an ammonia nitrogen analyzer is proposed, which is mainly used for automatic and effective analysis of ammonia nitrogen content.

[0036] The ammonia nitrogen analyzer mainly includes an organism, a liquid addition and color development position 200, a sample position, a filtration and volume adjustment position 400 on the organism, a sample cup set in the sample position, a stirring assembly set at the liquid addition and color development position 200, and a filtration and volume adjustment device set at the filtration and volume adjustment position 400.

[0037] And the 700 three-dimensional robotic arm, used for transporting and transferring sample cups and filtering positioning devices.

[0038] A spectrophotometer is used for colorimetric analysis of solutions after color development.

[0039] Ammonia nitrogen refers to the nitrogen in water in the form of free ammonia (NH3) and ammonium ions (NH4+). 4+ Nitrogen exists in the form of nitrate nitrogen (NO3). Animal-derived organic matter generally contains more nitrogen than plant-derived organic matter. Furthermore, nitrogenous organic matter in human and animal excrement is very unstable and easily decomposes into ammonia. Therefore, increased ammonia nitrogen content in water refers to combined nitrogen existing in the form of ammonia or ammonium ions. In natural surface water and groundwater bodies, nitrate nitrogen is the main component, supplemented by free ammonia (NH3) and ammonium ions (NH4+). 4+ Ammonia nitrogen in polluted water, existing in the form of hydrated ammonia or non-ionic ammonia, is called hydrated ammonia. Non-ionic ammonia is the main factor causing toxicity to aquatic organisms, while ammonium ions are relatively non-toxic. According to the national standard for Class III surface water, the concentration of non-ionic ammonia nitrogen is ≤1 mg / L.

[0040] Ammonia nitrogen is a nutrient in water bodies that can lead to eutrophication. It is a major oxygen-consuming pollutant in water bodies and is toxic to fish and some aquatic organisms.

[0041] Ammonia nitrogen in water can be converted into nitrite under certain conditions. Long-term consumption of this water can lead to the formation of nitrosamines, which combine with proteins to form nitrosamines, a potent carcinogen that is extremely harmful to human health. Therefore, the ammonia nitrogen content in water is an indicator of the degree of nitrogen-containing organic pollution in water bodies and must be strictly controlled. Furthermore, real-time and rapid analysis of industrial emissions and water bodies such as rivers and lakes is urgently needed to provide immediate data on ammonia nitrogen levels in water, enabling appropriate measures to be taken to ensure that enterprises meet emission standards and that the ammonia nitrogen levels in rivers and lakes remain within environmental safety limits.

[0042] The ammonia nitrogen analyzer includes:

[0043] The machine body has multiple sample placement positions 100 formed on the machine body, and multiple sample cups are provided on the multiple sample placement positions 100.

[0044] The main body forms the foundation of the entire analyzer, supporting and carrying the entire analyzer.

[0045] In some embodiments, the body includes an organic shell.

[0046] The sample placement position 100 is a sample placement slot formed on the housing, which is mainly used to place sample cups. Multiple sample placement slots are provided and arranged side by side.

[0047] By arranging multiple sample placement positions 100, multiple sample cups can be accommodated simultaneously, allowing for the analysis and processing of multiple sample cups during analysis.

[0048] The sample cup contains the sample to be tested. When not being tested, the sample cup is placed in one of the multiple sample placement positions 100.

[0049] In some embodiments of this application, the ammonia nitrogen analyzer further includes a liquid addition and color development position 200 formed on the body, and a stirring component is disposed at the liquid addition and color development position 200 for stirring.

[0050] The liquid addition and color development position 200 is a liquid addition and color development tank, which can be used to place containers transferred to this position, such as sample cups.

[0051] Multiple sample cups requiring liquid addition need to be moved to the liquid addition and color development position 200 for liquid addition.

[0052] To ensure rapid reaction of the sample inside the sample cup after liquid addition, a stirring component is installed at the liquid addition and color development position 200. The stirring component can be arranged at the bottom of the liquid addition and color development position 200.

[0053] When the corresponding container is placed at position 200 of the liquid addition and color development stage, the sample inside can be stirred by activating the stirring assembly, which can accelerate the reaction speed and improve the uniformity of the reaction.

[0054] In some embodiments of this application, the ammonia nitrogen analyzer further includes a liquid addition assembly 300, which is located at the liquid addition and color development position 200 and is configured to draw the corresponding first-class reagent or second-class reagent into a container transported to the liquid addition and color development position.

[0055] The liquid addition assembly 300 is mainly used for adding liquid. The liquid addition assembly 300 can be a liquid addition pump valve assembly in the prior art, used to draw out the first type of reagent or the second type of reagent, and add it into the container located at the liquid addition and color development position 200 for reaction or color development operation.

[0056] At the liquid addition and color development position 200, there are Class I and Class II reagents that need to be added for ammonia nitrogen analysis. When it is necessary to add them, the liquid addition component 300 simply needs to operate to extract the corresponding reagent and add it into the container at this position.

[0057] The filter has a fixed volume of 400, which is formed on the body and multiple filters are installed.

[0058] The filter volume control 400 is a filter volume control tank formed on the body.

[0059] Multiple filter positioning devices are provided, with the number being at least the same as the number of sample positions.

[0060] The filter positioning device includes a volume-fixing component 500 and a filter component 600. The filter component 600 is detachably disposed inside the volume-fixing component 500. The volume-fixing component 500 can support and place the filter component 600, preventing the filter component 600 from being placed in any position and causing contamination.

[0061] During setup, the volume-fixing component 500 is positioned at the filter volume-fixing position 400, and is supported by the filter volume-fixing position 400.

[0062] The filter element 600 is configured to be detachably connected to the volume-regulating element 500, which facilitates the separation of the two. When it is necessary to remove the filter element 600 for filtration, it can be detached from the volume-regulating element 500 for independent use.

[0063] In some embodiments of this application, the volume-fixing component 500 is inserted into the filter volume-fixing position 400. The volume-fixing component 500 is assembled into the filter volume-fixing position 400 by an insertion method, which facilitates the subsequent grasping operation of the volume-fixing component 500.

[0064] The number of filtration and volume-regulating devices should at least match the number of sample positions to ensure that each sample cup placed in a sample position has a corresponding filter element 600 to filter it after flocculation and sedimentation.

[0065] Each sample cup is matched with a filter element 600 for filtering, which avoids cross-contamination caused by cross-use and affects the detection accuracy.

[0066] On the other hand, the clarified sample filtered out in each sample cup can be contained by the filter element 600 equipped in each sample cup, so as to separate the clarified sample from the remaining solution sample in the sample cup, which facilitates the collection of the clarified sample.

[0067] The 700 three-dimensional robotic arm, when assembled onto the machine body, can move in three directions.

[0068] The three-dimensional robotic arm 700 can adopt the existing three-dimensional robotic arm 700 structure that can perform three-way motion, which will not be elaborated here.

[0069] The sampling component 710 is mounted on the three-dimensional robotic arm 700 and can move under the drive of the three-dimensional robotic arm 700 to extract samples.

[0070] In some embodiments, the sampling component 710 includes a sampling needle, a sampling tube connected to the sampling needle, and a sampling pump connected to the sampling tube to provide the power required for sampling.

[0071] The sampling pump operates to drive the sampling needle for sampling.

[0072] The gripping component 720 is mounted on the three-dimensional robotic arm 700 and can move under the drive of the three-dimensional robotic arm 700. It is used to grip and transfer the sample cup, the filter component 600, or the volume-fixing component 500.

[0073] The gripping component 720 is a gripping robot in the prior art, which can move in three directions under the drive of the three-dimensional robotic arm 700, and transfer the position of the gripped component through its three-way movement.

[0074] Its gripping component 720 can be a sample cup, a filter component 600, or a volume-fixing component 500.

[0075] It can grasp the sample cup and move it back and forth between the sample position and the liquid addition and color development position 200.

[0076] Alternatively, the filter element 600 can be grasped and placed into the corresponding sample cup for filtration;

[0077] You can also add liquid by grabbing the volume-fixing component 500 to the liquid addition and color development position 200.

[0078] In this process, after the sample in the sample cup has flocculated and precipitated, the three-dimensional robotic arm 700 is configured such that the gripping component 720 grips the filter device and detaches it from the volume-fixing component 500.

[0079] The filter device is placed inside the sample cup so that the clear liquid in the sample cup is immersed into the filter element 600 and filtered by the filter sheet disposed inside the filter element 600;

[0080] Grab 500 ml of the volume-fixing component and bring it to the liquid addition and color development point at 200 ml.

[0081] Move to the filter element 600, move downwards and extract a quantitative amount of the filtered clarified sample through the sampling element 710 and transfer it into the volume-fixing element 500 to react with the second type of reagent added into the volume-fixing element 500 by the liquid addition component 300.

[0082] In this embodiment, when the ammonia nitrogen analyzer performs ammonia nitrogen analysis, the three-dimensional robotic arm 700 grasps the sample cup corresponding to the sample position and transfers it to the liquid addition and color development position 200. According to the settings of the controller inside the device, a quantitative amount of the first type of reagent is added. After the reagent is added, the stirring component at the bottom of the liquid addition and color development position 200 works to stir the sample solution. Then, the three-dimensional robotic arm 700 grasps the sample cup and returns to the corresponding sample position, waiting for the sample to flocculate and precipitate.

[0083] After the sample has completed flocculation and sedimentation, the three-dimensional robotic arm 700 moves to the filtration and volume-fixing device position to grab the filter component 600, places the filter component 600 into the sample cup to filter the sample, and the clarified sample enters the filter component 600. The three-dimensional robotic arm 700 then grabs the volume-fixing device to the liquid addition and color development position 200.

[0084] The three-dimensional robotic arm 700 moves above the sample cup, moves down to extract a quantitative amount of filtered clarified sample through the extraction component, and transfers the extracted clarified sample to the volume-fixing component 500.

[0085] When the liquid addition component 300 is activated, the second type of reagent required for color development is added, and the stirring component is activated to stir so that the second type of reagent and the first type of reagent are mixed evenly.

[0086] Then the volume-fixing component 500 is moved back to the original filter volume-fixing position 400 for color development.

[0087] After color development, the sampling component 710 is moved to the volume-fixing component 500 by the three-dimensional robotic arm 700 to perform sampling. The sample is then extracted to a spectrophotometer for colorimetric analysis and the results are recorded.

[0088] In ammonia nitrogen analysis, multiple sample cups are sequentially moved to the liquid addition and color development position 200 by a three-dimensional robotic arm 700 for liquid addition. During filtration, the three-dimensional robotic arm 700 presses the filter component 600 into the corresponding sample cup for immersion filtration. After filtration, when color development is required, multiple volume-fixing components 500 are transferred to the liquid addition and color development position 200 by the three-dimensional robotic arm 700. The liquid addition component 300 extracts the clear solution from the corresponding sample cup for color development. The entire liquid addition, extraction, filtration, and color development operation is fully automated, and the entire analysis process does not require manual intervention, improving analysis efficiency and accuracy, and enabling the analysis of large batches of samples.

[0089] The existing analysis method is as follows: a three-dimensional robotic arm 700 drives the first and second liquid addition components to sequentially add the first type of reagent, namely the reaction reagents zinc sulfate and sodium hydroxide, to multiple first sample cups. The third and fourth liquid addition components add the second reagent, namely the colorimetric reagents potassium sodium tartrate solution and Nessler's reagent, to the colorimetric tube. During the addition process, the first, second, third, and fourth liquid addition components are moved by the three-dimensional robotic arm 700, while the positions of the multiple sample cups and colorimetric tubes remain fixed.

[0090] Because ammonia nitrogen analyzers need to analyze a large number of samples in sample cups, the analysis operation includes adding first-class and second-class reagents and performing colorimetric analysis. After the colorimetric tubes are used up, the colorimetric tubes or sample cups need to be cleaned by the cleaning unit configured in the machine. When the sample volume is large, the colorimetric tubes need to be cleaned frequently, which takes a lot of time and greatly reduces the analysis efficiency.

[0091] The analysis method in this embodiment is completely different from the above method. The addition of the first type of reagent to the sample cup and the addition of the second type of reagent to the volume-fixing component 500 are carried out by a three-dimensional moving robot in a sequential cycle, transporting each sample cup and each volume-fixing component 500 to the liquid addition and color development position 200 one by one for liquid addition operation. In this embodiment, the sample cup and the volume-fixing component 500 are transferable and movable throughout the entire reagent reaction operation. In this way, after the volume-fixing component 500 or the sample cup is completely used, they can be removed from the machine in batches for batch cleaning, which facilitates cleaning and improves cleaning efficiency.

[0092] In some embodiments of this application, the filter element 600 has a through portion, configured to allow liquid in the sample cup to flow into the filter element 600 when the filter element 600 is placed inside the sample cup;

[0093] The filter element is assembled inside the filter component 600 and is used to filter the liquid flowing into the filter component 600.

[0094] The through portion is a through hole provided through the filter component 600. Multiple through holes are provided so that when the filter component 600 is placed inside the sample cup, the sample liquid inside the sample cup can enter the filter component 600.

[0095] The filter element is a filter membrane or filter paper, which is disposed inside the filter element 600 and is used to filter the sample liquid entering the filter element 600 to obtain a clear sample liquid.

[0096] The existing method for extracting clarified sample liquid from flocculated liquid is mainly through a sampling needle. The sampling needle is mounted on a robotic arm, and the filter element 600 is located inside the sampling needle. When the sampling needle draws up the flocculated sample liquid, the pump connected to the sampling needle provides power for direct aspiration.

[0097] During the absorption process, the liquid is filtered through the filter elements.

[0098] However, this type of filtration method is very difficult because the filter element is generally a filter membrane with a small pore size. The small pore size of the filter membrane results in high resistance during suction, requiring a very large suction force and making suction very difficult.

[0099] The filter component 600 proposed in the above embodiments of this application can effectively avoid the above-mentioned problems.

[0100] The filter element 600 has undergone a complete structural improvement. Instead of being built into the sampling needle, it is now a single component. During use, it is grasped by the three-dimensional robotic arm 700 and placed into the sample cup. When the sample reaction solution in the sample cup is subjected to pressure from the filter element 600, it is immersed into the filter element 600 through the through-hole for filtration. This filtration structure eliminates the need for suction from the sampling needle and pump, resulting in not only better filtration of the sample solution but also faster filtration speed.

[0101] To improve filtration speed and efficiency, the filter element weight can be designed to be 600 during setup.

[0102] The filter element 600 is mainly used for filtration by being pressed into the sample cup. To ensure that the filter element 600 does not float due to the buoyancy of the solution in the sample cup when placed inside, it should automatically sink into the sample cup. The weight of the filter element 600 is N times the buoyancy of the solution filling the sample cup, where N is greater than or equal to 2.

[0103] In some embodiments of this application, the filter element 600 is made of a corrosion-resistant material to prevent it from being corroded by contact with chemicals.

[0104] The volume-regulating component 500 is made of corrosion-resistant material to prevent it from being corroded by contact with chemicals.

[0105] The filter element 600 and the volume-regulating element 500 are made of polytetrafluoroethylene. This ensures that the filter element 600 has sufficient weight, which can both ensure that the filter element can be pressed down to the bottom of the liquid in the sample cup for filtration and ensure that the sample liquid in the sample cup will not overflow.

[0106] In some embodiments of this application, the filter element 600 has an opening 610 at one end, which is configured to facilitate the sampling element 710 in extracting a clarified sample. The opening 610 is an opening formed on the filter element 600 so that the three-dimensional robotic arm 700 can drive the sampling element 710 to extend into its interior to extract the clarified sample.

[0107] In some embodiments of this application, the filter is arranged perpendicular to the axis of the through-hole, and the sample liquid in the sample cup flows in along the through-hole. The way the filter is arranged perpendicular to the axis of the through-hole can ensure that all the solution flowing in from the through-hole can pass through the filter, thus ensuring the filtration effect of the solution.

[0108] In some embodiments of this application, the through portion is formed at one end of the filter member 600 opposite to the opening 610, or at a side position of the filter member 600.

[0109] In the setup, the opening 610 is located at the top of the filter element 600, and the through portion is located at the bottom opposite the position of the opening 610.

[0110] When the filter element 600 is placed inside the sample cup, the sample solution flows into the filter element 600 from bottom to top through the through-hole at the bottom and is then filtered by the filter plate. The solution flows into the filter element 600 from bottom to top, and the filter plate is positioned perpendicular to the axis of the through-hole. The filter plate acts as a barrier, preventing unfiltered solution from being trapped below the filter plate, while the filtered, clear solution is trapped above the filter plate, facilitating extraction of the clear solution by the sampling element 710.

[0111] In some embodiments of this application, the through portions are arranged at the side of the filter element 600 and are formed in multiple sets, with the multiple sets of through portions arranged at a certain interval along the circumference of the filter element 600.

[0112] The through-hole is located on the side of the filter element 600. When the filter element 600 is placed in the sample cup, the solution enters the filter element 600 from the side and is then filtered through the filter sheet.

[0113] When arranging the filter, it can be fitted to fit the through-hole on the side.

[0114] To improve filtration efficiency and effectiveness, multiple sets of through sections can be arranged along the 600° circumference of the filter components.

[0115] When the solution enters the sample cup, it can simultaneously enter the filter element 600 through the surrounding through-holes.

[0116] In some embodiments of this application, a through portion is provided on the side of the filter component 600 and at the end of the filter component 600 opposite to the opening 610, and a filter sheet is provided at each through portion to ensure the filtration effect.

[0117] In some embodiments of this application, the filter sheet is provided at the location corresponding to the through-hole, so that the solution flowing out of the through-hole can then enter the filter sheet for filtration, thereby improving the filtration effect.

[0118] In some embodiments, the filter element is positioned at a certain distance from the through portion and is arranged perpendicular to the inner wall of the filter element 600 to divide the filter element 600 into a buffer chamber and a clarified liquid placement chamber.

[0119] The solution entering through the through-hole can first enter the buffer chamber, and then be filtered by the filter before entering the clear liquid placement chamber.

[0120] The filtered sections are stored in the buffer chamber.

[0121] In some embodiments of this application, the filter component 600 includes a filter body 620 and a filter base 630, the filter body 620 and the filter base 630 are detachably connected, and the through portion is provided on the filter body 620 and / or the filter base 630.

[0122] The filter base 630 and the filter body 620 can be fixed by thread or by snap-fit ​​connection.

[0123] The filter element can be installed on the filter base 630. When the filter element needs to be replaced, the filter base can be removed and the filter element placed on the filter base can be removed and replaced. The replacement operation is convenient and quick.

[0124] In some embodiments of this application, the volume-regulating component 500 has an insertion cavity 510 with an open top, the outline of the insertion cavity 510 being adapted to the outer outline of the filter component 600, the filter component 600 being inserted into the insertion cavity 510 and at least partially extending from the open top of the insertion cavity 510.

[0125] By configuring the volume-regulating component 500 and the filter component 600 in an insert-fit manner, they can be easily and quickly assembled into place.

[0126] The height of the filter component 600 is set to be greater than that of the volume-fixing component 500, so that its top can extend out of the volume-fixing component 500 to facilitate the gripping operation of the gripping component 720 on the three-dimensional robotic arm 700.

[0127] In some embodiments of this application, in order to facilitate the quick insertion of the filter component 600 into the volume-fixing component 500, the filter component 600 is configured to include a tapered outer surface, and the inner wall of the volume-fixing component 500 is configured to have a tapered inner surface, so that when the filter component 600 is placed inside the volume-fixing component 500, it can be quickly placed in place without deflection.

[0128] The tapered fit between the volume-regulating component 500 and the filter component 600 ensures that the internal filter component 600 will not be tilted, and also facilitates the gripping component 720 of the three-dimensional robotic arm 700 to perform precise gripping operations.

[0129] In some embodiments of this application, a cleaning station 800 is also included, wherein a cleaning container filled with clean water is provided at the cleaning station 800, and the cleaning container is configured to be used for cleaning the sampling component 710 after sampling.

[0130] The cleaning station 800 is a cleaning tank, and the cleaning container is filled with clean water, which is mainly used for the sampling component 710.

[0131] After the sampling component 710 on the three-dimensional robotic arm 700 completes a sampling, it needs to be cleaned by drawing clean water from the cleaning container to prevent cross-contamination when drawing the next solution sample.

[0132] The machine body is equipped with a waste discharge position and a waste discharge container at the waste discharge position to collect the waste liquid.

[0133] A waste discharge pump is connected to the waste discharge container to discharge the waste liquid at the waste discharge location.

[0134] The cleaning container is equipped with a water replenishment pump connected to it for replenishing water and a wastewater discharge pump connected to it for discharging wastewater.

[0135] The sampling unit is equipped with a pump and valve assembly connected to it and a liquid filling pipeline connected to it.

[0136] During cleaning, the valve is opened, the pump is turned on, and the sampling component draws clean water from the cleaning container and enters the liquid addition pipeline. Finally, the water is discharged to the waste discharge point through the liquid addition pipeline.

[0137] The method of drawing clean water into the sampling line and discharging it out through the liquid filling line ensures a good cleaning effect on the sampling components.

[0138] During cleaning, not only will the sampling component draw clean water to clean its interior, but it will also be placed in a cleaning container to clean its exterior. After cleaning, the water in the cleaning container becomes wastewater, at which point the wastewater pump is turned on to discharge the wastewater.

[0139] After the wastewater in the cleaning container is drained, the water replenishment pump is turned on to draw clean water to replenish the cleaning container, so as to facilitate the next cleaning operation of the sampling parts.

[0140] In some embodiments of this application, multiple liquid addition components 300 are provided, and each liquid addition component 300 is movably arranged on the body, so that the liquid addition component 300 can add a first type of reagent or a second type of reagent to any container at the liquid addition and color development position 200.

[0141] The liquid addition component 300 can be connected to the machine body via a linear motion module to enable relative movement. During liquid addition, it can move to the liquid addition and color display position 200 to perform the liquid addition operation.

[0142] In some embodiments of this application, the stirring assembly includes a stirring motor and a stirring magnetic component connected to the stirring motor. The bottom of the volume-regulating component 500 has a built-in stirring magnet for cooperating with the stirring magnetic component to stir the sample located inside it.

[0143] When the volume-fixing component 500 is transported to the liquid addition and color development position 200 by the three-dimensional robotic arm 700, the stirring motor can be started to drive the stirring magnetic component to move, thereby driving the stirring magnet located inside the volume-fixing component 500 that can be attracted by the stirring magnetic component to move, so as to realize the stirring function of the solution with the second type of reagent added inside the volume-fixing component 500.

[0144] In some embodiments of this application, an analytical method for an ammonia nitrogen analyzer is proposed, comprising the following steps:

[0145] Step 1: The 3D robotic arm 700 moves and grabs the sample cup to the liquid addition and color development position 200. The first type of reagent is added into the sample cup through the liquid addition component 300, and the mixture is stirred by the stirring component.

[0146] Step 2: The three-dimensional robotic arm moves 700 degrees and picks up the sample cup after reaction at the liquid addition and color development position 200 to the sample position for flocculation and precipitation;

[0147] After the first preset time, the three-dimensional robotic arm 700 moves and grasps the filter component 600, pressing it down into the sample cup to filter the sample inside the sample cup.

[0148] Flocculation and sedimentation require a first preset time. After the first preset time, the sample in the sample cup can be filtered.

[0149] The filtration operation is automated by a three-dimensional robotic arm 700 gripping the filter element 600 from the volume-fixing component 500 and placing it into the sample cup.

[0150] During the flocculation and sedimentation process of any sample cup, the liquid addition operation of the remaining unadded sample cup and the placement of the filter component 600 corresponding to the sample cup that has completed flocculation and sedimentation are carried out alternately.

[0151] If the first sample cup is flocculating and settling, the second sample cup is added. After the addition of liquid is completed, if the flocculation and settling of the first sample cup is finished, the filter component 600 corresponding to the first sample cup is placed by the three-dimensional robotic arm 700. Then, the third sample cup is added. After the flocculation and settling of the second sample cup is finished, the filter component 600 of the second sample cup is placed. This process is repeated continuously.

[0152] Alternatively, while the first sample cup is undergoing flocculation and precipitation, the second sample cup is added. If the flocculation and precipitation in the first sample cup is not yet complete after the addition of liquid, the third sample cup is added. If the flocculation and precipitation in the first sample cup is complete after the addition of liquid in the third sample cup, the corresponding filter device is placed, and then the fourth sample cup is added. After the addition of liquid, it is determined whether to place the filter component 600 of the second sample cup.

[0153] By using a cross-processing method, the flocculation and sedimentation time can be fully utilized, shortening the waiting time and improving the efficiency of detection.

[0154] Step 3: The 3D robotic arm moves 700 degrees and grasps the volume-fixing component 500 to the liquid addition and color development position 200.

[0155] The three-dimensional robotic arm 700 moves to the sample cup, extracts the clarified sample from inside the filter component 600 and transfers it to inside the volume-fixing component 500;

[0156] The liquid addition component 300 adds a second type of reagent into the volume-fixing component 500, and the stirring component stirs the solution inside the volume-fixing component 500.

[0157] The clarified sample is then extracted by the sampling component 710 on the three-dimensional robotic arm 700 and moved to the matching volume-fixing component 500 at the liquid addition and color development position 200.

[0158] The second type of reagent is added into the volume-fixing component 500 by the operation of the liquid addition component 300 to achieve color development.

[0159] After the addition of the second type of reagent, the solution is stirred by the stirring assembly and the stirring magnet inside the volume-fixing component 500.

[0160] Step 4: After the second preset time has elapsed, the 3D robotic arm 700 grasps the volume-fixing component 500 and moves it to the filtration volume-fixing position 400 for color development. After the second preset time has elapsed since the stirring was completed, the volume-fixing component 500 is grasped and moved to the filtration volume-fixing position 400 for the color development reaction.

[0161] After the third preset time, the 3D robotic arm 700 extracts the colorimetric sample from the volumetric component 500 and transfers it to a spectrophotometer for colorimetric analysis.

[0162] The color development process requires a third preset time. After the third preset time is completed, the sample can be extracted by the 3D robotic arm 700 and sent to the spectrophotometer for colorimetric analysis.

[0163] During the color development reaction, one of the multiple positioning components is positioned at the liquid addition and color development position 200, while at least one positioning component is in the waiting phase for the color development reaction.

[0164] While one of the volume-fixing components 500 is at the filtration and volume-fixing position 400 waiting for color development, the other volume-fixing components 500 simultaneously perform the transfer to the liquid addition and color development position 200 and the addition of the clarified sample and the second type of reagent.

[0165] The colorimetric analysis of the positioning component after color development and the transfer, clarification of samples, and addition of second-class reagents of the volume-fixing component 500 without added liquid for color development are carried out alternately.

[0166] This cross-processing method can greatly shorten the processing time and improve the efficiency of detection and analysis.

[0167] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. An ammonia nitrogen analyzer, characterized in that, Including: The body has multiple sample placement positions formed on the body, and multiple sample cups are arranged on the multiple sample placement positions; A liquid addition and color development point is formed on the machine body, and a stirring component is provided at the liquid addition and color development point for stirring; The liquid addition assembly, located at the liquid addition and color development position, is configured to draw the corresponding Class I or Class II reagent into the container transported to the liquid addition and color development position; Filter positioning positions are formed on the machine body, and multiple positions are set. Multiple filter positioning devices are provided, with their number at least matching the number of sample positions, including: A volume-regulating component is disposed at the filter volume-regulating position; And a filter element that can be detachably disposed within the volume-regulating component; The three-dimensional robotic arm, assembled onto the machine body, can move in three directions; The sampling component, mounted on the three-dimensional robotic arm, can move under the drive of the three-dimensional robotic arm to extract samples; The gripping component, mounted on the three-dimensional robotic arm, can move under the drive of the three-dimensional robotic arm and is used to grip and transfer sample cups, filter components, or volume-fixing components. In this process, after the sample in the sample cup has flocculated and precipitated, the three-dimensional robotic arm is configured to: grasp the filter device with the gripping component to separate it from the volume-fixing component; The filter device is pressed into the sample cup from top to bottom so that the clear liquid in the sample cup is immersed into the filter element and filtered by the filter plate arranged in the filter element; Grab the volume-fixing component and place it at the liquid addition and color development point; It moves to the filter element, moves downwards and extracts a quantitative amount of the filtered clarified sample through the sampling element and transfers it into the volume-fixing element to react with the second type of reagent added into the volume-fixing element by the liquid addition component.

2. The ammonia nitrogen analyzer according to claim 1, characterized in that, The filter element has a through portion and is configured such that when the filter element is placed inside the sample cup, the liquid in the sample cup flows into the filter element. A filter element, assembled inside a filter element, is used to filter the liquid flowing into the filter element.

3. The ammonia nitrogen analyzer according to claim 2, characterized in that, The filter element has an opening at one end, which is configured to facilitate the sampling element to extract a clarified sample.

4. The ammonia nitrogen analyzer according to claim 3, characterized in that, The through portion is formed at one end of the filter element opposite to the opening or at the side of the filter element.

5. The ammonia nitrogen analyzer according to claim 2, characterized in that, The filter is positioned corresponding to the location of the through section.

6. The ammonia nitrogen analyzer according to claim 2, characterized in that, The filter component includes a filter body and a filter base, the filter body and the filter base are detachably connected, and the through portion is provided on the filter body or the filter base.

7. The ammonia nitrogen analyzer according to claim 3, characterized in that, The volume-regulating component has an internal insertion cavity with an open top. The outline of the insertion cavity is adapted to the external outline of the filter component. The filter component is inserted into the insertion cavity and extends at least partially from the open top of the insertion cavity.

8. The ammonia nitrogen analyzer according to claim 1, characterized in that, It also includes a cleaning station and a waste discharge station. A cleaning container filled with clean water is provided at the cleaning station. The cleaning container is equipped with a water replenishment pump connected to it for replenishing water and a waste discharge pump connected to it for discharging wastewater. The sampling component is equipped with a liquid filling pipeline connected to it. A pump valve assembly is installed on the liquid filling pipeline. When the sampling component is cleaning at the cleaning position, the sampling component is placed in the cleaning container. The pump action causes the sampling component to draw clean water from the cleaning container and discharge it to the waste discharge position through the liquid filling pipeline. After cleaning is completed, the waste pump is started to discharge the wastewater from the cleaning container; The water pump starts to replenish water to the cleaning container.

9. The ammonia nitrogen analyzer according to claim 2, characterized in that, The stirring assembly includes: a stirring motor and a stirring magnetic component connected to the stirring motor; The volume-regulating component has a built-in stirring magnet at the bottom, which works in conjunction with the stirring magnetic component to stir the sample located inside it.

10. An analytical method based on an ammonia nitrogen analyzer according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The three-dimensional robotic arm moves and grasps the sample cup to the liquid addition and color development position. The first type of reagent is added into the sample cup through the liquid addition component, and the stirring component stirs the sample. Step 2: The three-dimensional robotic arm moves and picks up the sample cup after the reaction at the liquid addition and color development position, and moves it to the sample position for flocculation and precipitation; After the first preset time, the three-dimensional robotic arm moves, grabs the filter component and presses it into the sample cup to filter the sample in the sample cup. Step 3: The 3D robotic arm moves and grasps the volume-fixing component to the liquid addition and color development position; The three-dimensional robotic arm moves to the sample cup, extracts the clarified sample from inside the filter component, and transfers it to the volume-fixing component; The liquid addition component adds a second type of reagent into the volume-fixing component, and the stirring component stirs the solution inside the volume-fixing component. Step 4: After the second preset time, the 3D robotic arm grasps the volume-fixing component and moves it to the filter volume-fixing position for color development; After the third preset time, the three-dimensional robotic arm extracts the colorimetric sample from the fixed-volume component and sends it to the spectrophotometer for colorimetric comparison.

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