Ammonia nitrogen analyzer and analysis method

Abstract

The present invention discloses an ammonia nitrogen analyzer and an analysis method, the ammonia nitrogen analyzer comprises: 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; the 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; the liquid adding assembly is arranged at the liquid adding and color developing position; the filtering constant volume positions are formed on the machine body; the constant volume component is arranged at the filtering constant volume position; the filtering component is detachably arranged in the constant volume component; the three-dimensional mechanical arm is assembled on the machine body and can move in three directions; the sampling part is arranged on the three-dimensional mechanical arm and can be driven by the three-dimensional mechanical arm to move; and the grabbing component is arranged on the three-dimensional mechanical arm. According to the ammonia nitrogen analyzer provided by the invention, full-automatic detection of ammonia nitrogen analysis and detection is realized, and the detection efficiency and the detection precision are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water quality detection and analysis, and specifically relates to an ammonia nitrogen analyzer and an analysis method thereof. Background Art

[0002] At present, the main methods for determining ammonia nitrogen include Nessler's reagent colorimetry, salicylic acid colorimetry, alkali neutralization titration, ion electrode method, etc. Generally, laboratories carry out the determination of ammonia nitrogen according to the method specified in the national standard HJ 535-2009 Nessler's reagent colorimetry. However, the traditional manual ammonia nitrogen determination method is extremely time-consuming and laborious, requires manual operation and control in the laboratory, has high requirements on the accuracy of the operator's operation requirements, and the reagents have certain dangers. The overall work efficiency is relatively low, which can no longer meet the needs of today's society. Therefore, there is an urgent need for a fully automatic ammonia nitrogen determination system and a determination method thereof, which can solve the problems of low efficiency and low accuracy in the traditional manual ammonia nitrogen determination process, reduce the contact between the operator and the reagents, and increase the safety of the operation.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the above-mentioned technical problems existing in battery pole piece detection in the prior art, the present invention proposes an ammonia nitrogen analyzer, which realizes fully automated detection of ammonia nitrogen analysis and detection, and improves detection efficiency and detection accuracy.

[0005] In order to achieve the above invention / design purpose, the present invention adopts the following technical solutions: An ammonia nitrogen analyzer, comprising: A machine body, on which a plurality of sample placement positions are formed, and a plurality of sample cups are arranged on the plurality of sample placement positions; The liquid adding and color developing position is formed on the machine body, and a stirring component is arranged at the liquid adding and color developing position for stirring; A liquid adding component, disposed at the liquid adding and color developing position, is configured to extract the corresponding first type reagent or second type reagent into a container transported to the heating and color developing position; A filtration fixed volume position is formed on the machine body and is provided in plurality; A plurality of filter positioning devices are provided, the number of which is at least the same as the number of sample positions, including: A constant volume component, arranged at the filtering constant volume position; and a detachable filter component disposed in the constant volume component; The three-dimensional robotic arm is mounted on the machine body and can move in three directions; The sampling component is arranged on the three-dimensional mechanical arm and can be moved under the drive of the three-dimensional mechanical arm to extract samples; A grabbing component is arranged on the three-dimensional mechanical arm and can move under the drive of the three-dimensional mechanical arm, and is used to grab and transfer the sample cup, the filtering component or the constant volume component; Wherein, after the sample in the sample cup is flocculated and precipitated, the three-dimensional mechanical arm is configured as follows: the grabbing component grabs the filtering device to separate it from the constant volume component; Pressing the filter device into the sample cup from top to bottom so that the clear liquid in the sample cup penetrates into the filter component and is filtered by the filter sheet disposed in the filter component; Grab the fixed volume component to the liquid adding and color developing position; Move to the filtering part, move downward and extract a quantitative filtered clarified sample through the sampling part and transfer it to the constant volume part to react with the second type of reagent added to the interior of the constant volume part by the liquid adding component.

[0006] Compared with the prior art, the advantages and positive effects of the present invention are: When performing ammonia nitrogen analysis, the ammonia nitrogen analyzer moves multiple sample cups in sequence to the liquid adding and color development position through a three-dimensional robotic arm to perform liquid adding operations. When filtering, the filter component is pressed into the corresponding sample cup by the three-dimensional robotic arm for immersion filtration. When color development is required after the filtration is completed, the three-dimensional robotic arm transfers multiple fixed volume components to the liquid adding and color development position respectively, and the liquid adding component extracts the clarified solution from the corresponding sample cup for color development. The entire liquid adding, liquid extraction, filtration and color development operations are completely realized through automation. The entire analysis operation process does not require human participation, which improves the analysis efficiency and accuracy, and realizes the analysis of large quantities of samples.

[0007] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is a structural schematic diagram of an embodiment of the ammonia nitrogen analyzer proposed by the present invention; Figure 2 This is a three-dimensional structural diagram of a filtering and volume-fixing device of an embodiment of an ammonia nitrogen analyzer proposed by the present invention; Figure 3It is a structural schematic diagram of a positioning component of an embodiment of an ammonia nitrogen analyzer proposed by the present invention; Figure 4 It is a structural schematic diagram of a filter component of an embodiment of the ammonia nitrogen analyzer proposed by the present invention.

[0010] In the figure, 100, sample placement position; 200, liquid addition and color development position; 300, liquid addition component; 400, filtration and volume fixing position; 500, volume fixing component; 510, insertion cavity; 600, filtration component; 610, opening; 620, filter body; 630, filter seat; 700, three-dimensional robotic arm; 710, sampling component; 720, grabbing component; 800, cleaning position. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present invention.

[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0014] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0015] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0016] In some embodiments of the present application, an ammonia nitrogen analyzer is proposed, which is mainly used for automatically and effectively analyzing the ammonia nitrogen content.

[0017] The ammonia nitrogen analyzer mainly includes an organism, a liquid adding and color developing position 200, a sample position, a filtering and volume fixing position 400 and a sample cup arranged in the sample position, a stirring component arranged at the liquid adding and color developing position 200 and a filtering and volume fixing device arranged at the filtering and volume fixing position 400.

[0018] and a three-dimensional robotic arm 700, which is used to carry and transfer sample cups and filter positioning devices.

[0019] Spectrophotometer is used to perform colorimetric analysis on the solution after color development.

[0020] Ammonia nitrogen refers to the free ammonia (NH3) and ammonium ions (NH 4+ ) in the form of nitrogen. The nitrogen content of animal organic matter is generally higher than that of plant organic matter. At the same time, the nitrogen-containing organic matter in human and animal feces is very unstable and easily decomposes into ammonia. Therefore, when the ammonia nitrogen content in water increases, it refers to the combined nitrogen in the form of ammonia or ammonium ions. The main nitrogen in natural surface water and groundwater is nitrate nitrogen (NO3), free ammonia (NH3) and ammonium ions (NH 4+ ) in polluted water is called hydrated ammonia, also known as non-ionic ammonia. Non-ionic ammonia is the main factor causing toxicity to aquatic organisms, while ammonium ions are relatively non-toxic. For national standard Class III surface water, the concentration of non-ionic ammonia nitrogen is ≤1 mg / L.

[0021] Ammonia nitrogen is a nutrient in water bodies that can cause eutrophication. It is the main oxygen-consuming pollutant in water bodies and is toxic to fish and certain aquatic organisms.

[0022] Ammonia nitrogen in water can be converted into nitrite under certain conditions. If consumed for a long time, the nitrite in the water will combine with protein to form nitrosamines, which are strong carcinogens and extremely harmful to human health. Therefore, the content of ammonia nitrogen in water is an indicator of the degree of pollution of water bodies by nitrogen-containing organic matter and must be strictly controlled. At the same time, it is more urgent to conduct real-time and rapid analysis of industrial emissions and water bodies such as rivers, lakes, etc., to provide data on the real-time content of ammonia nitrogen in water, so as to take corresponding measures to ensure that enterprises meet emission standards and the ammonia nitrogen content in water bodies such as rivers, lakes, etc. is within the environmental safety index.

[0023] Ammonia nitrogen analyzer includes: A machine body is provided with a plurality of sample placement positions 100 , and a plurality of sample cups are arranged on the plurality of sample placement positions 100 .

[0024] The body forms the foundation of the entire analyzer and is used to support the entire analyzer.

[0025] In some embodiments, the body comprises an organic shell.

[0026] The sample placement position 100 is a sample placement slot formed on the housing, which is mainly used to place a sample cup. A plurality of sample placement slots are provided and arranged side by side.

[0027] By arranging a plurality of sample placement positions 100 so as to accommodate a plurality of sample cups at the same time, the plurality of sample cups can be analyzed and processed during analysis.

[0028] The sample to be tested is placed inside the sample cup. When not being tested, the sample cup is placed in a plurality of sample placement positions 100 .

[0029] In some embodiments of the present application, the ammonia nitrogen analyzer further includes a liquid adding and color developing position 200 formed on the body, and a stirring component is disposed at the liquid adding and color developing position 200 for stirring.

[0030] The liquid adding and color developing position 200 is a liquid adding and color developing tank, which can be used to place containers transferred to this point, such as sample cups, etc.

[0031] A plurality of sample cups that need to be filled with liquid all need to be moved to the liquid adding and color developing position 200 for liquid adding.

[0032] In order to ensure that the sample inside the sample cup reacts quickly after adding liquid, a stirring component is correspondingly provided at the liquid adding and color developing position 200 , and the stirring component can be arranged at the bottom of the liquid adding and color developing position 200 .

[0033] When the corresponding container is placed at the liquid adding and color developing position 200, the stirring component can be started to stir the sample inside, thereby accelerating the speed of the sample reaction and the uniformity of the sample reaction.

[0034] In some embodiments of the present application, the ammonia nitrogen analyzer also includes a liquid adding component 300, which is arranged at the liquid adding color development position 200 and is configured to extract the corresponding first type reagent or second type reagent into a container transported to the heating color development position.

[0035] The liquid adding component 300 is mainly used for adding liquid. The liquid adding component 300 can select the liquid adding pump valve component in the prior art to extract the first type of reagent or the second type of reagent to add it to the container at the liquid adding color development position 200 for reaction or color development operation.

[0036] The first type of reagent and the second type of reagent required for ammonia nitrogen analysis are arranged at the liquid adding and color developing position 200. When addition is required, the liquid adding component 300 only needs to be actuated to extract the corresponding reagent and add it into the container at this position.

[0037] A filtering fixed volume position 400 is formed on the machine body and is provided in plurality; The filtering constant volume position 400 is a filtering constant volume tank formed on the machine body.

[0038] A plurality of filter positioning devices are provided, and the number of the filter positioning devices is at least the same as the number of sample positions.

[0039] The filter positioning device includes a constant volume component 500 and a filter component 600. The filter component 600 can be detachably arranged inside the constant volume component 500. The filter component 600 can be supported and placed by the constant volume component 500 to avoid contamination caused by placing the filter component 600 at any position.

[0040] During setting, the constant volume component 500 is set at the filtering constant volume position 400, and is supported by the filtering constant volume position 400.

[0041] The filter component 600 is configured to be detachably connected to the constant volume component 500, which can facilitate separation of the two. When the filter component 600 needs to be taken out separately for filtering, it can be detached from the constant volume component 500 to facilitate the separate use of the filter component 600.

[0042] In some embodiments of the present application, the volume-fixing component 500 is inserted into the filtering volume-fixing position 400, and the volume-fixing component 500 is assembled to the filtering volume-fixing position 400 by insertion, so as to facilitate the subsequent grabbing operation of the volume-fixing component 500.

[0043] The number of filtering and constant volume devices at least matches the number of sample positions, so as to ensure that the sample cups placed in the sample positions are filtered by the corresponding matching filtering components 600 after flocculation and sedimentation.

[0044] Each sample cup is matched with a filter component 600 for filtering the sample cup, which can avoid the problem of cross-contamination caused by cross-use that affects the detection accuracy; On the other hand, the clarified sample filtered out of each sample cup can be contained by the filtering component 600 provided in each sample cup, so that the clarified sample is separated from the remaining solution samples in the sample cup, thereby facilitating the collection of the clarified sample.

[0045] The three-dimensional robot arm 700 is mounted on the machine body and can move in three directions.

[0046] The three-dimensional robotic arm 700 can adopt the three-dimensional robotic arm 700 structure that can perform three-dimensional movement in the prior art, which will not be described in detail here.

[0047] The sampling component 710 is disposed on the three-dimensional robotic arm 700 and can be moved driven by the three-dimensional robotic arm 700 to extract samples.

[0048] In some embodiments, the sampling component 710 includes a sampling needle, a sampling tube connected to the sampling needle, and a sampling pump, wherein the sampling pump is connected to the sampling tube to provide power required for sampling.

[0049] The sampling pump can drive the sampling needle to perform sampling.

[0050] The grabbing component 720 is disposed on the three-dimensional robotic arm 700 and can move under the drive of the three-dimensional robotic arm 700 to grab and transfer the sample cup, the filtering component 600 or the constant volume component 500 .

[0051] The grasping component 720 is a grasping robot in the prior art, which can move in three directions driven by the three-dimensional robot arm 700, and transfer the position of the grasped component through the three-dimensional movement.

[0052] The grabbing component 720 may be a sample cup, a filtering component 600 or a volume fixing component 500 .

[0053] It can grab the sample cup and move back and forth between the sample position and the liquid adding and color development position 200 .

[0054] Alternatively, the filter element 600 may be grabbed and placed in a corresponding sample cup for filtering; The volume-fixing component 500 can also be grabbed and brought to the liquid-adding and color-developing position 200 for adding liquid.

[0055] After the sample in the sample cup is flocculated and precipitated, the three-dimensional mechanical arm 700 is configured as follows: the grabbing component 720 grabs the filtering device to separate it from the constant volume component 500; Place the filter device in the sample cup so that the clear liquid in the sample cup is immersed in the filter component 600 and filtered by the filter sheet disposed in the filter component 600; Grab the volume-fixing component 500 and move it to the liquid-adding and color-developing position 200; Move to the filtering component 600 , move downward and extract a quantitative filtered clarified sample through the sampling component 710 and transfer it to the constant volume component 500 to react with the second type of reagent added to the interior of the constant volume component 500 by the liquid adding component 300 .

[0056] When the ammonia nitrogen analyzer in this embodiment performs ammonia nitrogen analysis, the three-dimensional robotic arm 700 grabs the sample cup corresponding to the sample position and transfers it to the liquid adding and color developing position 200, and adds a certain amount of the first type of reagent according to the setting of the controller inside the device. After the reagent is added, the stirring component at the bottom of the liquid adding and color developing position 200 works to stir the sample solution. Then the three-dimensional robotic arm 700 grabs the sample cup and returns to the corresponding sample position to wait for the sample to flocculate and precipitate.

[0057] After waiting for the sample to complete flocculation and sedimentation, the three-dimensional robotic arm 700 moves to the filtering and volume fixing device position to grab the filtering component 600, places the filtering component 600 in the sample cup to filter the sample, and the clarified sample enters the inside of the filtering component 600. The three-dimensional robotic arm 700 grabs the volume fixing device to the liquid adding and color developing position 200.

[0058] The three-dimensional robot arm 700 moves to the top of the sample cup, moves downward to extract a quantitative filtered clarified sample through the extraction component, and transfers the extracted clarified sample to the constant volume component 500 .

[0059] The liquid adding component 300 is activated to add the second type of reagent required for color development, and the stirring component is activated to stir so that the second type of reagent and the first type of reagent are evenly mixed.

[0060] Then the constant volume component 500 is transferred back to the original filtering constant volume position 400 for color development.

[0061] After the color development is completed, the three-dimensional mechanical arm 700 drives the sampling component 710 to the fixed volume component 500 for sampling, and the sample is taken into the spectrophotometer for colorimetry and the result is recorded.

[0062] When performing ammonia nitrogen analysis, the ammonia nitrogen analyzer moves multiple sample cups in sequence to the liquid adding and color development position 200 through the three-dimensional robotic arm 700 to perform liquid adding operations. When filtering, the filter component 600 is pressed into the corresponding sample cup by the three-dimensional robotic arm 700 for immersion filtration. When color development is required after the filtration is completed, the multiple fixed volume components 500 are respectively transferred to the liquid adding and color development position 200 by the three-dimensional robotic arm 700, and the liquid adding component 300 extracts the clarified solution of the corresponding sample cup for color development. The entire liquid adding, liquid extraction, filtration and color development operations are completely realized through automation. The entire analysis operation process does not require human participation, which improves the analysis efficiency and accuracy, and realizes the analysis of large quantities of samples.

[0063] The existing analysis method is: the three-dimensional robotic arm 700 drives the first liquid adding component and the second liquid adding component to circulate and add the first type of reagents, namely, reaction reagents zinc sulfate and sodium hydroxide, to multiple first sample cups respectively and in turn, and the third liquid adding component and the fourth liquid adding component are used to add the second reagent, namely, the color developing reagent potassium sodium tartrate solution and Nessler's reagent, into the color developing tube. During the adding process, the first liquid adding component, the second liquid adding component, the third liquid adding component and the fourth liquid adding component are driven to move by the three-dimensional robotic arm 700, while the positions of the multiple sample cups and the color developing tube are fixed.

[0064] Since the ammonia nitrogen analyzer needs to analyze samples in a large number of sample cups, the analysis operation includes adding the first type of reagents and the second type of reagents and performing color analysis. After the color tube is used, the above analysis method needs to be cleaned by the cleaning unit configured in the machine. When the sample volume is large, the color tube needs to be cleaned frequently, and the cleaning takes a lot of time, which greatly reduces its analysis efficiency.

[0065] The analysis method in the embodiment of the present application 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 fixed volume component 500 are both carried out by a three-dimensional mobile manipulator to circulate each sample cup and each fixed volume component 500 in turn to the liquid adding and color development position 200 for liquid adding operation one by one. The sample cup and the fixed volume component 500 in the embodiment of the present application are transferable and movable during the entire reagent reaction operation process. In this way, after the fixed volume component 500 or the sample cup is completely used, it can be removed from the machine body in batches for batch cleaning, which facilitates cleaning and improves cleaning efficiency.

[0066] In some embodiments of the present application, the filter component 600 has a through portion configured to allow the liquid in the sample cup to flow into the filter component 600 when the filter component 600 is placed inside the sample cup; The filter sheet is assembled inside the filter component 600 and is used to filter the liquid flowing into the filter component 600 .

[0067] The through portion is a through hole provided through the filter component 600 , and a plurality of 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 into the filter component 600 .

[0068] The filter sheet is a filter membrane sheet or a filter paper sheet, which is disposed inside the filter component 600 and is used to filter the sample liquid entering into the filter component 600 to obtain a clarified sample liquid.

[0069] The existing method of extracting clarified sample liquid from flocculated liquid is mainly through suction on a sampling needle. The sampling needle is set on a mechanical arm, and the filter component 600 is set in the sampling needle. When the sampling needle sucks the flocculated sample liquid, the pump body connected to the sampling needle provides power for direct suction.

[0070] During the suction process, the liquid is filtered between the filter elements.

[0071] However, the filtering method of this structure is very difficult because the filter element is generally a filter membrane with a small pore size. The filter membrane has a small pore size, and the resistance during suction is large. The suction force required during suction is very large and suction is very difficult, making the filtering operation very difficult.

[0072] The filter component 600 proposed in the above embodiment of the present application can effectively avoid the above problems.

[0073] The structure of the filter component 600 has been completely improved. It is not set inside the sampling needle, but is set as a single component. When in use, it is grabbed by the three-dimensional mechanical arm 700 and placed in the sample cup, so that the sample reaction solution in the sample cup is immersed into the filter component 600 through the penetration part when it is subjected to the pressure of the filter component 600 for filtration. This filtering structure does not require the use of a sampling needle and a pump to absorb the suction of the liquid, and not only has a good filtering effect on the sample solution but also a fast filtering speed.

[0074] In order to improve the filtering speed and filtering effect, the weight of the filtering component 600 can be designed during setting.

[0075] The filter component 600 is mainly used to be pressed into the sample cup for filtering. To ensure that the filter component 600 does not float up due to the buoyancy of the solution in the sample cup when placed in the sample cup, and to ensure that it can automatically sink into the sample cup, the weight of the filter component 600 is N times the buoyancy of the solution filling the sample cup, where N is greater than or equal to 2.

[0076] In some embodiments of the present application, the filter component 600 is made of an anti-corrosion material to avoid being corroded by contact with chemicals.

[0077] The constant volume component 500 is made of anti-corrosion material to avoid corrosion due to contact with chemicals.

[0078] The filter component 600 and the constant volume component 500 are made of polytetrafluoroethylene, which ensures that the filter component 600 has sufficient weight, so that the filter component can be normally pressed down to the bottom of the liquid in the sample cup for filtering and the sample liquid in the sample cup will not overflow.

[0079] In some embodiments of the present application, the filter component 600 has an opening 610 at one end, and the opening 610 is configured to facilitate the sampling component 710 to extract a clarified sample. The opening 610 is an opening formed on the filter component 600, so that the three-dimensional mechanical arm 700 drives the sampling component 710 to extend into the interior thereof to extract a clarified sample.

[0080] In some embodiments of the present application, the filter plate is arranged perpendicular to the axis of the through-portion, and the sample liquid in the sample cup will flow in along the through-portion. The filter plate is arranged perpendicular to the axis of the through-portion to ensure that all the solution flowing in from the through-portion can flow through the filter plate, thereby ensuring the filtering effect on the solution.

[0081] In some embodiments of the present application, the through portion is formed at an end of the filter component 600 opposite to the opening portion 610 , or is formed at a side position of the filter component 600 .

[0082] During the setting, the opening portion 610 is set at the top end of the filter component 600 , and the through portion is set at the bottom end position opposite to the opening portion 610 .

[0083] When the filter component 600 is placed inside the sample cup, the sample solution flows into the filter component 600 from bottom to top through the through-hole at the bottom and then passes through the filter sheet for filtration. The solution flows into the filter component 600 from bottom to top. The filter sheet is arranged perpendicular to the axis of the through-hole. The unfiltered solution is blocked below the filter sheet by the filter sheet block, and the filtered solution, i.e., the clarified solution, is blocked above the filter sheet, so that the sampling component 710 can extract the clarified solution above.

[0084] In some embodiments of the present application, the penetration portions are arranged at the side of the filter component 600 and are formed in multiple groups, and the multiple groups of penetration portions are arranged at a certain interval along the circumference of the filter component 600.

[0085] The penetration portion is disposed at a side position of the filter component 600. When the filter component 600 is placed in the sample cup, the solution will enter the filter component 600 from the side and then be filtered through the filter sheet.

[0086] During arrangement, the filter sheet can be arranged in contact with the through-hole of the side portion.

[0087] In order to improve the filtering efficiency and effect, the penetration parts can be arranged in multiple groups along the circumference of the filter component 600.

[0088] When the solution enters the sample cup, it can simultaneously enter the interior of the filter component 600 through the through-holes on all sides.

[0089] In some embodiments of the present application, a through portion is provided on the side of the filter component 600 and on the end of the filter component 600 opposite to the opening 610, and a filter sheet is provided correspondingly at the through portion at each position to ensure the filtering effect.

[0090] In some embodiments of the present application, the filter plate is arranged at a position corresponding to the position of the penetration portion, so that it can be ensured that the solution flowing out of the penetration portion can then enter the filter plate for filtration, thereby improving the filtering effect.

[0091] In some embodiments, the filter plate is disposed at a certain distance from the penetration portion, and the filter plate is arranged perpendicular to the inner wall of the filter component 600 to separate the filter component 600 into a buffer chamber and a clarified liquid placement chamber.

[0092] The solution entering through the penetration portion may first enter the buffer chamber, and then enter the clarified liquid placement chamber after being filtered through the filter sheet.

[0093] The filtered partitions are arranged in the buffer chamber for storage.

[0094] In some embodiments of the present application, the filter component 600 includes a filter body 620 and a filter seat body 630 , the filter body 620 is detachably connected to the filter seat body 630 , and the through portion is provided on the filter body 620 and / or the filter seat body 630 .

[0095] The filter seat body 630 and the filter body 620 can be fixed by threaded connection or snap connection.

[0096] The filter disc can be arranged on the filter seat body 630. When the filter disc needs to be replaced, the filter seat can be disassembled and then the filter disc arranged on the filter seat can be taken out and replaced. The replacement operation is convenient and quick.

[0097] In some embodiments of the present application, an insertion cavity 510 with an open top is formed inside the constant volume component 500, and the contour of the insertion cavity 510 is adapted to the outer contour of the filter component 600. The filter component 600 is inserted in the insertion cavity 510 and at least partially extends from the opening at the top of the insertion cavity 510.

[0098] By arranging the volume-fixing component 500 and the filtering component 600 in a plug-in fit manner, the two can be quickly assembled into place.

[0099] The height of the filtering component 600 is set to be greater than that of the constant volume component 500 so that the top of the filtering component 600 can extend out of the constant volume component 500 to facilitate the grasping operation of the grasping component 720 on the three-dimensional robot arm 700.

[0100] In some embodiments of the present application, in order to facilitate the rapid insertion of the filter component 600 into the interior of the constant volume component 500, the filter component 600 is configured to include a conical outer side surface, and the inner wall of the constant volume component 500 is configured to be a conical inner side surface, so that the filter component 600 can be quickly placed into place when placed inside the constant volume component 500 without deflection.

[0101] The conical matching structure of the constant volume component 500 and the filter component 600 can ensure that the internal filter component 600 will not be deflected, and also facilitate the grasping component 720 of the three-dimensional robot arm 700 to perform precise grasping operations.

[0102] In some embodiments of the present application, a cleaning position 800 is further included, at which a cleaning container containing clean water is provided, and the cleaning container is configured to be used for cleaning the sampling component 710 after sampling.

[0103] The cleaning position 800 is a cleaning tank, and clean water is contained inside the cleaning container, which is mainly used for the sampling component 710.

[0104] After the sampling component 710 on the three-dimensional robot arm 700 completes a sampling, it is necessary to draw clean water from the cleaning container for cleaning to prevent cross contamination when drawing the next solution sample.

[0105] A waste discharge position is arranged on the machine body, and a waste discharge container is arranged at the waste discharge position for receiving waste liquid.

[0106] The waste container is connected with a waste pump for discharging waste liquid at the waste position.

[0107] The cleaning container is provided with a water replenishment pump for replenishing water and a waste discharge pump for discharging waste water.

[0108] The sampling component is equipped with a pump valve assembly connected thereto and a liquid adding pipeline communicating therewith.

[0109] During cleaning, the valve is opened, the pump is turned on, and the sampling component draws clean water from the cleaning container, enters the liquid adding pipeline, and finally discharges it to the waste discharge position through the liquid adding pipeline.

[0110] The method of sucking clean water from the sampling pipeline and discharging it from the liquid adding pipeline can ensure a good cleaning effect on the sampling parts.

[0111] 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 sewage, and the waste pump is turned on to discharge the waste water.

[0112] After the waste water in the cleaning container is discharged, the water replenishment pump is turned on to draw clean water through the water replenishment pump to replenish the cleaning container, so as to facilitate the next cleaning operation of the sampling parts.

[0113] In some embodiments of the present application, a plurality of liquid adding components 300 are provided, and each liquid adding component 300 is movably arranged on the body, so that the liquid adding component 300 can add the first type of reagent or the second type of reagent to any container at the liquid adding and color developing position 200 .

[0114] The liquid adding component 300 can be connected to the machine body through a linear moving module to achieve relative movement. When adding liquid, it can move to the liquid adding and color developing position 200 to perform the liquid adding operation.

[0115] In some embodiments of the present application, the stirring assembly includes: a stirring motor and a stirring magnetic component connected to the stirring motor. A stirring magnetic component is built into the bottom of the constant volume component 500 for cooperating with the stirring magnetic component to stir the sample located therein.

[0116] When the constant volume component 500 is transported to the liquid adding and color developing 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 constant volume component 500 and being 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 constant volume component 500.

[0117] In some embodiments of the present application, an analysis method of an ammonia nitrogen analyzer is proposed, comprising the following steps: Step 1: The three-dimensional robotic arm 700 moves, grabs the sample cup to the liquid adding and color developing position 200, adds the first type of reagent into the sample cup through the liquid adding component 300, and stirs it through the stirring component; Step 2: The three-dimensional robotic arm 700 moves to grab the sample cup after the reaction at the liquid addition and color development position 200 and move it to the sample position for flocculation and precipitation; After the first preset time has passed, the three-dimensional mechanical arm 700 moves, grabs the filtering component 600 and presses it down into the sample cup to filter the sample in the sample cup.

[0118] The flocculation and sedimentation needs to go through a first preset time, and after the first preset time, the sample in the sample cup can be filtered.

[0119] The filtering operation is performed by the three-dimensional mechanical arm 700 grabbing the filtering component 600 from the fixed volume component 500 and placing it into the sample cup to achieve automatic filtering.

[0120] During the flocculation and sedimentation process of any sample cup, the liquid addition operation of the remaining sample cups not yet added with liquid and the placement of the filter components 600 corresponding to the sample cups that have completed the flocculation and sedimentation are performed alternately.

[0121] For example, when the first sample cup is flocculating and settling, the second sample cup is added with liquid. 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 mechanical arm 700, and then the third sample cup is added with liquid. After the flocculation and settling of the second sample cup is finished, the filter component 600 of the second sample cup is placed, and the cycle continues in sequence; Alternatively, when the first sample cup is flocculating and settling, continue to add liquid to the second sample cup. After the addition is completed, if the flocculation and sedimentation of the first sample cup is not completed, continue to add liquid to the third sample cup. After the third liquid sample cup is added, if the flocculation and sedimentation of the first sample cup is completed, place its corresponding filter device, and then continue to add liquid to the fourth sample cup. After the addition, determine whether to place the filter component 600 of the second sample cup.

[0122] The cross-processing method can fully utilize the flocculation and sedimentation time, shorten the waiting time and improve the efficiency of detection.

[0123] Step 3: The three-dimensional mechanical arm 700 moves to grab the fixed volume component 500 to the liquid adding and color developing position 200; The three-dimensional mechanical arm 700 moves to the sample cup, extracts the clarified sample from the filter component 600 and transfers it to the constant volume component 500; The liquid adding component 300 adds the second type of reagent into the interior of the constant volume component 500, and the stirring component stirs the solution inside the constant volume component 500.

[0124] The clarified sample is extracted by the sampling component 710 on the three-dimensional mechanical arm 700 and moved to the liquid adding and color developing position 200 and into the fixed volume component 500 matched therewith.

[0125] Through the operation of the liquid adding assembly 300, the second type of reagent is added into the interior of the fixed volume component 500 to perform color development.

[0126] After the second type of reagent is added, the solution is stirred by the cooperation of the stirring assembly and the stirring magnet inside the constant volume component 500 .

[0127] Step 4: After the second preset time, the three-dimensional mechanical arm 700 grabs the fixed volume component 500 to the filtering fixed volume position 400 for color development. After the stirring is completed and the second preset time has passed, the fixed volume component 500 is grabbed to the filtering fixed volume position 400 for color development reaction.

[0128] After the third preset time has passed, the three-dimensional robotic arm 700 extracts the color-developed sample inside the fixed volume component 500 to the spectrophotometer for colorimetry.

[0129] The color development needs to wait for a third preset time. After the color development is completed after the third preset time, the three-dimensional robot 700 can extract the sample to the spectrophotometer for colorimetric analysis.

[0130] When the color development reaction is in progress, one of the multiple positioning components is at the liquid adding color development position 200, and at least one positioning component is in the waiting state for the color development reaction.

[0131] When any one of the fixed volume components 500 is at the filtering fixed volume position 400 waiting for color development, the other fixed volume components 500 are simultaneously transferred to the liquid adding color development position 200 and the clarified sample and the second type of reagent are added.

[0132] The colorimetric analysis of the positioning component that has completed color development and the transfer of the fixed volume component 500 that has not been added with liquid for color development, the clarification of the sample and the addition of the second type of reagent are performed alternately.

[0133] This cross-operation method can greatly shorten the operation time and improve the efficiency of detection and analysis.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An ammonia nitrogen analyzer, characterized in that: Included are: A machine body, on which a plurality of sample placement positions are formed, and a plurality of sample cups are arranged on the plurality of sample placement positions; The liquid adding and color developing position is formed on the machine body, and a stirring component is arranged at the liquid adding and color developing position for stirring; A liquid adding component, disposed at the liquid adding and color developing position, is configured to extract the corresponding first type reagent or second type reagent into a container transported to the heating and color developing position; A filtration fixed volume position is formed on the machine body and is provided in plurality; A plurality of filter positioning devices are provided, the number of which is at least the same as the number of sample positions, including: A constant volume component, arranged at the filtering constant volume position; and a detachable filtering component disposed in the constant volume component; The three-dimensional robotic arm is mounted on the machine body and can move in three directions; The sampling component is arranged on the three-dimensional mechanical arm and can be moved under the drive of the three-dimensional mechanical arm to extract samples; A grabbing component is arranged on the three-dimensional mechanical arm and can move under the drive of the three-dimensional mechanical arm, and is used to grab and transfer the sample cup, the filtering component or the constant volume component; Wherein, after the sample in the sample cup is flocculated and precipitated, the three-dimensional mechanical arm is configured as follows: the grabbing component grabs the filtering device to separate it from the constant volume component; Pressing the filter device into the sample cup from top to bottom so that the clear liquid in the sample cup penetrates into the filter component and is filtered by the filter sheet disposed in the filter component; Grab the fixed volume component to the liquid adding and color developing position; Move to the filtering part, move downward and extract a quantitative filtered clarified sample through the sampling part and transfer it to the constant volume part to react with the second type of reagent added to the interior of the constant volume part by the liquid adding component.

2. The ammonia nitrogen analyzer according to claim 1, characterized in that: The filter component has a through portion configured to allow the liquid in the sample cup to flow into the filter component when the filter component is placed inside the sample cup; The filter sheet is installed inside the filter component and is used to filter the liquid flowing into the filter component.

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

4. The ammonia nitrogen analyzer according to claim 3, characterized in that: The penetration portion is formed at an end of the filter component opposite to the opening portion or at a side portion of the filter component.

5. The ammonia nitrogen analyzer according to claim 2, characterized in that: The filter sheet is arranged at a position corresponding to the position of the penetration portion.

6. The ammonia nitrogen analyzer according to claim 2, characterized in that: The filter component comprises a filter body and a filter seat body, the filter body is detachably connected to the filter seat body, and the penetration portion is arranged on the filter body or the filter seat body.

7. The ammonia nitrogen analyzer according to claim 3, characterized in that: An inserting cavity with an open top is formed inside the constant volume component. The contour of the inserting cavity matches the outer contour of the filter component. The filter component is inserted in the inserting cavity and at least partially extends out from the open top of the inserting cavity.

8. The ammonia nitrogen analyzer according to claim 1, characterized in that: It also includes a cleaning position and a waste discharge position, wherein a cleaning container containing clean water is arranged at the cleaning position, and the cleaning container is provided with a water replenishment pump connected thereto for replenishing water and a waste discharge pump connected thereto for discharging waste water; The sampling component is provided with a liquid adding pipeline connected thereto, and a pump valve assembly is arranged on the liquid adding pipeline. When the sampling component is taken to the cleaning position for cleaning, the sampling component is placed in the cleaning container, and the pump action enables the sampling component to extract clean water in the cleaning container and discharge it to the waste position through the liquid adding pipeline. After cleaning is completed, the waste pump starts to discharge the waste water in the cleaning container; The water replenishment pump starts to replenish water to the cleaning container.

9. The ammonia nitrogen analyzer according to claim 2, characterized in that: The stirring assembly comprises: a stirring motor and a stirring magnetic member connected to the stirring motor; A stirring magnet is built into the bottom of the constant volume component, which is used to cooperate with the stirring magnetic piece to stir the sample inside the constant volume component.

10. An analysis method of an ammonia nitrogen analyzer, characterized in that: The steps include: Step 1: The three-dimensional robotic arm moves, grabs the sample cup to the liquid adding and color development position, adds the first type of reagent into the sample cup for reaction through the liquid adding component, and stirs it through the stirring component; Step 2: The three-dimensional robotic arm moves to grab the sample cup after the reaction at the liquid addition and color development position and move it to the sample position for flocculation and precipitation; After a first preset time, the three-dimensional mechanical arm moves, grabs the filter component and presses it into the sample cup to filter the sample in the sample cup; Step 3: The three-dimensional robotic arm moves to grab the fixed volume component to the liquid adding and color development position; The three-dimensional mechanical arm moves to the sample cup, extracts the clarified sample from the filter component and transfers it to the constant volume component; The liquid adding component adds the second type of reagent into the fixed volume component, and the stirring component stirs the solution inside the fixed volume component; Step 4: After the second preset time, the three-dimensional robotic arm grabs the fixed volume component to the filtering fixed volume position for color development; After the third preset time has passed, the three-dimensional robotic arm extracts the colored sample inside the fixed volume component to the spectrophotometer for colorimetry.

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