Detection system and detection method for soil analysis of instant potassium sulfate

Abstract

The invention relates to the technical field of soil analysis and detection, and particularly discloses a detection system and a detection method for soil analysis of instant potassium sulphate, the detection system comprises a dilution tank and a detection unit for soil analysis, and the detection system also comprises a telescopic stirring mechanism which is arranged in the dilution tank and comprises an upper stirring mechanism and a lower stirring mechanism, the upper stirring mechanism and the lower stirring mechanism are connected through a spring; the filter pressing mechanism is used for carrying out filter pressing on the diluted soil solution and collecting filtrate; the device comprises a collecting tank, the top of the collecting tank extends outwards to form a filter pressing plate, and the collecting tank is connected with an upper stirring mechanism; the rotary telescopic assembly is used for driving the filter pressing mechanism to rotate and vertically move; and when the filter pressing mechanism moves downwards, the filter pressing mechanism filters and collects filtrate and can extrude and filter the filtered soil. According to the invention, the residual quantity of potassium in the solid after solid-liquid separation can be reduced, so that the measurement error of potassium in the filtrate is reduced, and a mixed solution does not need to be poured and transferred.

Description

Technical Field

[0001] The invention relates to the technical field of soil analysis and detection, and in particular to a detection system and a detection method for instant potassium sulfate soil analysis. Background Art

[0002] Soluble Potassium Sulfate (SOP) is a highly efficient potassium fertilizer, mainly used to provide potassium required by plants. Compared with ordinary potassium sulfate (K2SO4), Soluble Potassium Sulfate has a faster dissolution rate and is suitable for agriculture and horticulture and soil improvement where potassium needs to be quickly provided.

[0003] Although instant potassium sulfate can quickly provide potassium, excessive application may lead to salt accumulation in the soil, which in turn affects the root health of plants. Therefore, the potassium content in the soil needs to be controlled within a reasonable range, which can both provide the required potassium for plants and avoid the problem of salt accumulation caused by excessive fertilization.

[0004] Then, the demand for potassium by soils of different soil types and the demand for potassium by different plants are different. Therefore, it is necessary to apply an appropriate amount of instant potassium sulfate according to the characteristics of different plants and the soil in which they are planted. Therefore, it is necessary to test the soil for specific plant varieties, including soil testing before fertilization and soil testing after applying different amounts of instant potassium sulfate, in order to finally determine the amount of instant potassium sulfate to be applied.

[0005] The common soil test uses the extraction method, which mixes and filters the collected soil with the extraction solution. The potassium content in the soil can be determined by detecting the potassium content in the filtrate through colorimetry, atomic absorption spectroscopy, liquid chromatography, etc. Since the potassium content in the soil has a great influence on plant growth, the accuracy of potassium measurement is particularly important. The factors that affect the accuracy of potassium measurement mainly include the collection of soil samples and the collection of filtrate during extraction.

[0006] The existing extraction and filtration methods mainly include 1) pouring the mixed solution into a filter structure containing filter paper; 2) letting the mixed solution settle and taking the supernatant; 3) pouring the mixed solution into a centrifuge to achieve solid-liquid separation. Method 1) is time-consuming and requires cumbersome operation of pouring the mixed solution; Method 3) requires the addition of expensive equipment and requires cumbersome operation of pouring the mixed solution; Method 2) will cause part of the potassium-containing solution to remain in the solid, resulting in a large error in the measurement of potassium in the filtrate. Summary of the invention

[0007] The object of the present invention is to provide a detection system for instant potassium sulfate soil analysis to reduce the residual amount of potassium in the solid after solid-liquid separation, thereby reducing the measurement error of potassium in the filtrate, and there is no need to dump and transfer the mixed solution.

[0008] In addition, the present invention also provides a detection method based on the above detection system.

[0009] The present invention is achieved through the following technical solutions: A detection system for instant potassium sulfate soil analysis, comprising a dilution tank and a detection unit for soil analysis, the detection system also comprising: The telescopic stirring mechanism is placed in the dilution tank, and comprises an upper stirring mechanism and a lower stirring mechanism, and the upper stirring mechanism and the lower stirring mechanism are connected by a spring; The filter press mechanism is used to filter the diluted soil solution and collect the filtrate; it includes a collecting tank, the top of which extends outward to form a filter press plate, and the soil solution enters the collecting tank after being filtered by the filter press plate, and the collecting tank is connected to the upper stirring mechanism; The rotating telescopic assembly is used to drive the filter press mechanism to rotate and move vertically; when moving downward, the filter press mechanism filters and collects the filtrate and can squeeze and filter the filtered soil.

[0010] The telescopic stirring mechanism of the present invention is different from the conventional stirring structure. On the one hand, it can be used for stirring and mixing the mixed liquid (soil and water). On the other hand, when pressure filtration is required, the telescopic stirring mechanism can be contracted under the extrusion of the filter press mechanism, that is, it can use the compressibility of the spring to reduce the vertical length of the telescopic stirring mechanism, so as to provide downward moving space for the filter press mechanism, so as to realize the extrusion filtration of the filtered soil (wet mud) by the filter press mechanism.

[0011] The filter press mechanism of the present invention can rotate and vertically displace under the drive of the rotating telescopic component. When the rotating telescopic component drives the filter press mechanism to rotate, the telescopic stirring mechanism rotates with the filter press mechanism to realize the stirring function. When the rotating telescopic component drives the filter press mechanism to move downward, when the lower stirring mechanism abuts against the bottom of the dilution tank, the filter press mechanism continues to move downward to compress the spring, thereby providing space for the filter press mechanism to move downward until the filter press plate squeezes the wet mud after filtration and squeezes the residual liquid in the wet mud into the collection tank.

[0012] In summary, the present invention can not only realize the stirring function, but also reduce the residual liquid in the wet mud after solid-liquid separation, thereby reducing the residual potassium element in the wet mud, thereby reducing the measurement error of the potassium element in the filtrate, and there is no need to dump and transfer the mixed liquid by arranging a telescopic stirring mechanism, a filter press mechanism and a rotating telescopic assembly that cooperate with each other.

[0013] In a preferred embodiment, the dilution tank is composed of a stirring section and a filter press section from top to bottom, and the inner diameter of the stirring section is larger than the inner diameter of the filter press section; The outer diameter of the filter press plate is equal to the inner diameter of the filter press section.

[0014] When the dilution tank is in a stirring state, the filter press plate is located in the stirring section. Since the outer diameter of the filter press plate is smaller than the inner diameter of the stirring section, the pressure mechanism can rotate in the dilution tank; when the dilution tank is in a filtration state, the outer wall of the filter press plate moves downward against the inner wall of the filtration section. Since there is no radial gap between the filter press plate and the filtration section, the mixed liquid can only be filtered through the filter press plate and then flow from the top of the filter press plate to the collecting tank for collection.

[0015] The above arrangement can prevent the unfiltered mixed liquid from entering the collection tank. Since the unfiltered mixed liquid contains soil and has a high turbidity, it is not conducive to subsequent filtrate detection and analysis.

[0016] In a preferred embodiment, the bottom of the filter press section is a necking section, and the inner diameter of the bottom of the necking section is greater than or equal to the maximum width of the lower stirring mechanism.

[0017] The above arrangement can provide as large a downward space as possible for the filter press mechanism to move downward, thereby achieving filtration of wet mud by the filter press plate.

[0018] In a preferred embodiment, the filter press plate includes an outer fixing ring and an inner fixing ring; the outer fixing ring and the inner fixing ring are connected via a plurality of connecting plates, and a filter screen is arranged between the connecting plates, the outer fixing ring and the inner fixing ring.

[0019] In a preferred embodiment, a connecting piece for connecting to the rotating and telescopic assembly is provided on the connecting plate.

[0020] In a preferred embodiment, a pressure mechanism is disposed on the outer wall of the collecting tank, and the pressure mechanism is used to pressurize the filtered soil. The pressure mechanism is composed of at least one pressure plate.

[0021] The setting of the above-mentioned pressurizing mechanism can be used as a stirring structure to stir the mixed liquid on the one hand, and on the other hand, it can compress the space between the filter press mechanism and the dilution tank that can accommodate wet mud. Under the premise of the same soil processing volume, the setting of the pressurizing mechanism can shorten the downward movement stroke of the filter press mechanism compared to not setting it, so as to achieve the filtration of wet mud.

[0022] In a preferred embodiment, the pressurizing mechanism includes a first pressurizing plate and / or a second pressurizing plate, the first pressurizing plate and the second pressurizing plate have a height difference, and ribs are arranged between the first pressurizing plate and the second pressurizing plate.

[0023] In a preferred embodiment, an annular pressure plate and / or a second pressure plate is disposed on the outer wall of the collecting tank; the annular pressure plate and the second pressure plate have a height difference, and a plurality of ribs are disposed between the annular pressure plate and the second pressure plate.

[0024] In a preferred embodiment, the collecting groove comprises a groove of constant diameter or a groove of variable diameter. When the collecting groove is a groove of variable diameter, the inner diameter of the collecting groove tends to gradually decrease from top to bottom.

[0025] In a preferred embodiment, the side wall of the dilution tank is provided with a liquid inlet and a feed plate; the feed plate is arranged at an angle; The detection system also includes a feeding mechanism, which is used to transport soil to a feeding plate, and the feeding mechanism is provided with a microwave heating mechanism.

[0026] The microwaves generated by the microwave heating mechanism of the present invention can penetrate the soil and generate cracks inside the soil, which is beneficial to subsequent stirring and mixing, that is, the dissolution of potassium in the soil can be better achieved.

[0027] The feed plate is tilted to facilitate the soil to be directed into the dilution tank.

[0028] At the same time, the present invention can realize automatic feeding by arranging the liquid inlet and the feeding plate on the side wall of the dilution tank, thereby improving automation.

[0029] In a preferred embodiment, the rotary telescopic assembly includes a driving mechanism, a rotating disk and a telescopic member; The driving mechanism is used to drive the turntable to rotate, the fixed end of the telescopic member is connected to the bottom of the turntable; the telescopic end of the telescopic member is connected to the filter pressing mechanism.

[0030] In a preferred embodiment, the top of the dilution tank is an open end, and a tank cover is detachably connected to the top of the dilution tank, and the rotating telescopic assembly is installed on the tank cover; a sampling port is provided on the tank cover.

[0031] The analysis method based on the above detection system comprises the following steps: S1. Soil sampling: Take the same amount of soil from 5-10 different locations and mix them evenly. The sampling depth is 5-20cm; S2. Soil pretreatment: drying, crushing and sieving the soil in sequence to make the particle size of the soil to be tested uniform; S3, soil dilution filtration: using the above detection system to treat the soil to obtain a filtrate; S4. Analysis: The potassium content in the filtrate is detected by a detection unit, and the potassium content in the soil is analyzed based on the potassium content in the filtrate.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention not only realizes the stirring function by arranging a telescopic stirring mechanism, a filter press mechanism and a rotating telescopic assembly that cooperate with each other, but also realizes the filtration of the mixed liquid and the extrusion filtration of the filtered soil (wet mud) through the special structure of the telescopic stirring mechanism and the filter press mechanism, which can reduce the residual liquid in the wet mud, thereby reducing the residual potassium element in the wet mud, and avoid the problem of cumbersome operation caused by pouring the mixed liquid out of the dilution tank.

[0033] 2. The present invention provides a pressure mechanism on the outer wall of the collecting tank; under the premise of the same soil processing volume, the pressure mechanism can shorten the downward movement of the filter press mechanism compared to not providing the pressure mechanism, thereby achieving filter pressing of wet mud. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 is a schematic diagram of the detection system of Example 1 of the present invention in a stirring state; Figure 2 This is a schematic diagram of the detection system of Example 1 of the present invention in a filter pressing state; Figure 3 This is a schematic structural diagram of the filter press mechanism of Example 1 of the present invention; Figure 4 It is a top view of the filter press mechanism of Example 1 of the present invention; Figure 5 This is a schematic structural diagram of a filter press mechanism according to Embodiment 2 of the present invention; Figure 6 This is a schematic structural diagram of the filter press mechanism of Example 3 of the present invention; Figure 7 This is a schematic diagram of the structure of the detection system of Example 4 of the present invention.

[0035] Marks and corresponding parts names in the attached drawings: 1-tank cover; 2-dilution tank; 3-driving mechanism; 4-telescopic member; 5-filter press mechanism; 6-telescopic stirring mechanism; 7-feeding mechanism; 11-sampling port; 21-stirring section; 22-filter press section; 23-narrowing section; 24-liquid inlet; 25-feed plate; 31-motor; 32-first gear; 33-second gear; 51-collecting tank; 52-filter press plate; 53-first pressure plate; 54-ribs; 55-second pressure plate; 56-upper fixed column; 57-annular pressure plate; 61-upper stirring mechanism; 62-spring; 63-lower stirring mechanism; 521-outer fixed ring; 522-inner fixed ring; 523-connecting plate; 524-filter screen; 525-connecting member. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details do not have to be employed to practice the present invention. In other embodiments, in order to avoid confusing the present invention, known structures, materials or methods are not specifically described. The materials, instruments and reagents used in the following examples, unless otherwise specified, can be obtained from commercial sources. The technical means used in the examples, unless otherwise specified, are conventional means well known to those skilled in the art.

[0038] In addition, 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. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] Embodiment 1: In the prior art, for filtering soil after dilution, either static stratification is used to remove the supernatant, which takes a long time and causes a large amount of liquid residue in the wet mud; or the diluted mixed liquid is poured out for filtration or centrifugal separation, which is cumbersome to operate.

[0040] In order to solve the problems of long time and complicated operation caused by filtration after soil dilution in the technology and large potassium element measurement error caused by large amount of liquid residue in wet mud, this embodiment provides a detection system for instant potassium sulfate soil analysis, such as Figure 1-Figure 5 As shown, it includes a dilution tank 2 and a detection unit for soil analysis. The detection unit adopts existing technology, and specifically can be a device used for colorimetry, atomic absorption spectrometry or liquid chromatography.

[0041] The detection system also includes: The telescopic stirring mechanism 6 is placed in the dilution tank 2. When it is squeezed in the vertical direction, its vertical length can be retracted. Specifically, the telescopic stirring mechanism 6 includes an upper stirring mechanism 61 and a lower stirring mechanism 63. The upper stirring mechanism 61 and the lower stirring mechanism 63 are connected by a spring 62. The elasticity of the spring 62 is used to adjust the vertical length of the telescopic stirring mechanism 6. Specifically, when the upper stirring mechanism 61 is subjected to downward pressure and / or the lower stirring mechanism 63 is subjected to upward pressure, as shown in FIG. Figure 2 As shown, the spring 62 is compressed and the vertical length of the telescopic stirring mechanism 6 is reduced; when the upper stirring mechanism 61 is subjected to an upward pulling force, as shown in FIG. Figure 1 As shown, under the action of the pulling force of the upper stirring mechanism 61 and the gravity of the lower stirring mechanism 63 , the spring 62 is stretched, thereby increasing the vertical length of the telescopic stirring mechanism 6 .

[0042] The filter press mechanism 5 is used to filter the diluted soil solution and collect the filtrate; it includes a collecting tank 51, the top of the collecting tank 51 extends outward to form a filter press plate 52, the soil solution enters the collecting tank 51 after being filtered by the filter press plate 52, and the collecting tank 51 is connected to the upper stirring mechanism 61.

[0043] In this embodiment, the filter press plate 52 is an annular flat plate structure, and the filter press plate 52 includes a filter screen 524. The filter screen 524 can allow water to pass through and block wet mud, that is, the filter screen 524 can filter the mixed liquid. The filter screen 524 can specifically be a filter cloth filter screen. In a specific case, Figure 5 As shown, the filter press plate 52 includes an outer fixing ring 521 and an inner fixing ring 522 ; the outer fixing ring 521 and the inner fixing ring 522 are connected via a plurality of connecting plates 523 , and a filter screen 524 is arranged between the connecting plates 523 , the outer fixing ring 521 and the inner fixing ring 522 .

[0044] In this embodiment, when the collecting tank 51 is a variable diameter tank, the inner diameter of the collecting tank 51 tends to gradually decrease from top to bottom, which is beneficial for guiding the filtrate into the collecting tank 51.

[0045] The rotating telescopic assembly is used to drive the filter press mechanism 5 to rotate and move vertically; when moving downward, the filter press mechanism 5 filters and collects the filtrate and can squeeze and filter the filtered soil. The rotating telescopic assembly can adopt any existing technology that can achieve the functions of rotation and telescopic.

[0046] In this embodiment, the rotary telescopic assembly includes a driving mechanism 3, a turntable and a telescopic member 4; the driving mechanism 3 is used to drive the turntable to rotate, and the fixed end of the telescopic member 4 is connected to the bottom of the turntable; the telescopic end of the telescopic member 4 is connected to the filter press mechanism 5. Specifically, one structure of the driving mechanism 3 is: including a motor 31, a first gear 32 and a second gear 33, the first gear 32 is arranged on the power output shaft of the motor 31, the second gear 33 is coaxially arranged on the outer wall of the turntable, and the first gear 32 and the second gear 33 are meshed. The driving mechanism 3 can also realize the driving of the turntable to rotate through a belt drive.

[0047] In this embodiment, the driving mechanism 3 drives the turntable to rotate, and since the filter pressing mechanism 5 is connected to the turntable through the telescopic member 4, the filter pressing mechanism 5 can rotate with the turntable, and the telescopic stirring mechanism 6 is driven to rotate, thereby realizing the stirring function of the telescopic stirring mechanism 6. The telescopic member 4 can be a hydraulic cylinder or a pneumatic cylinder, etc., and the telescopic member 4 is used to realize the up and down displacement of the filter pressing mechanism 5.

[0048] In a preferred embodiment, a connecting member 525 for connecting to a rotating telescopic assembly is provided on the connecting plate 523. Specifically, the connecting member 525 can be a connecting tube, and the telescopic end of the telescopic member 4 is inserted into the connecting tube and then fastened by bolts, thereby achieving a fixed connection between the telescopic end of the telescopic member 4 and the filter press mechanism 5.

[0049] In this embodiment, the telescopic stirring mechanism 6 can realize its stirring function by using the upper stirring mechanism 61 and the lower stirring mechanism 63, and when the spring 62 is compressed, the vertical length of the telescopic stirring mechanism 6 is reduced, which can provide space for the downward movement of the filter press mechanism 5: if a conventional stirring structure is adopted, the maximum stroke of the filter press mechanism 5 moving downward can only be the maximum height that the lower stirring mechanism 63 can descend. If the stroke is not large enough, the wet mud cannot be filtered, and it may even cause part of the mixed liquid to be unable to be filtered, resulting in too much liquid remaining in the dilution tank. One solution is not to set a stirring structure, but this cannot realize the stirring function. After the telescopic stirring mechanism 6 is adopted in this embodiment, the maximum stroke of the filter press mechanism 5 moving downward includes the maximum height that the lower stirring mechanism 63 can descend and the maximum compression length of the spring 62, which greatly increases the movement stroke of the filter press mechanism 5 and can realize the filtering of the wet mud after filtration, that is, this embodiment can have both stirring function and filter press function.

[0050] The working principle of this embodiment is: The soil and water to be tested are added to the dilution tank 2 in a volume ratio of 1:1. At this time, the filter press plate 52 is located above the liquid surface, and the filter press plate 52 can prevent the liquid from splashing out from the top open end of the dilution tank 2 during the stirring process; the spring 62 is in a stretched state, and the telescopic stirring mechanism 6 has a maximum vertical length; the driving mechanism 3 is started, and the soil and water are mixed by stirring the telescopic stirring mechanism 6 to obtain a mixed liquid. The telescopic end of the telescopic member 4 is driven to move downward, pushing the filter press mechanism 5 to move downward, and when the filter press plate 52 contacts the liquid surface, the filter screen 524 filters the mixed liquid, and the filtered filtrate enters the collection tank 51 from the top of the filter press plate 52 for collection. The filter press plate 52 continues to move downward under the drive of the telescopic member 4 until the mixed liquid is completely filtered, and then the filter press plate 52 continues to move downward under the drive of the telescopic member 4, and the filter press plate 52 generates a downward squeezing force on the wet mud, squeezing and filtering the residual liquid in the wet mud into the collection tank 51 for collection.

[0051] In summary, this embodiment not only realizes the stirring function by providing a telescopic stirring mechanism 6, a filter press mechanism 5 and a rotating telescopic assembly that cooperate with each other, but also can filter the mixed liquid and squeeze and filter the wet mud after filtration through the special structure of the telescopic stirring mechanism 6 and the filter press mechanism 5, which can reduce the residual liquid in the wet mud, thereby reducing the residual potassium element in the wet mud, and avoid the problem of cumbersome operation caused by pouring the mixed liquid out of the dilution tank 2.

[0052] In a preferred case, in order to prevent the mixed liquid from directly entering the collection tank 51 without being filtered, the dilution tank 2 is composed of a stirring section 21 and a filter press section 22 from top to bottom. The inner diameter of the stirring section 21 is larger than the inner diameter of the filter press section 22; the outer diameter of the filter press plate 52 is equal to the inner diameter of the filter press section 22. When in the stirring state, the filter press plate 52 is placed in the stirring section 21, and when in the filter press state, the filter press plate 52 moves downward into the filter press section 22. When in use, the soil to be tested and water are added to the dilution tank 2 in a volume ratio of 1:1. At this time, the filter press plate 52 is above the liquid level, and the liquid level is lower than the top of the filter press section 22, that is, the liquid level is lower than the junction of the filter press section 22 and the stirring section 21; Figure 1 As shown, when in the stirring state, the filter press plate 52 is placed in the stirring section 21. Since the inner diameter of the stirring section 21 is larger than the outer diameter of the filter press plate 52, the dilution tank 2 will not hinder the rotation of the filter press mechanism 5; when the stirring and mixing is completed, when filter pressing is required, the filter press plate 52 moves downward into the filter press section 22 until the filter press plate 52 contacts the liquid surface, and the filter pressing begins. When the filter press plate 52 continues to move downward, after all the liquid is completely filtered, the filter press plate 52 contacts and squeezes the wet mud, and the residual liquid in the wet mud is filtered into the collecting tank 51. During the filter pressing process, since the outer diameter of the filter press plate 52 is consistent with the inner diameter of the filter press section 22, that is, there is no gap between the filter press plate 52 and the filter press section 22, it can prevent the mixed liquid from directly entering the collecting tank 51 without being filtered.

[0053] Further preferably, the bottom of the filter press section 22 is a necking section 23, and the bottom inner diameter of the necking section 23 is greater than or equal to the maximum width of the lower stirring mechanism 63, so that the lower stirring mechanism 63 can move downward to the bottom of the dilution tank, which is conducive to achieving the lowest downward movement stroke of the telescopic stirring mechanism 6.

[0054] In a preferred case, in order to further shorten the downward stroke of the filter press plate 52, a pressurizing mechanism is provided on the outer wall of the collecting tank 51. The pressurizing mechanism is used to pressurize the filtered soil. The pressurizing mechanism is composed of at least one pressurizing plate. Since the pressurizing mechanism occupies a certain space, under the same volume of wet mud, after the pressurizing mechanism is provided, the height of the wet mud is increased, and the downward stroke of the filter press plate 52 can be shortened to achieve the filtration of the wet mud.

[0055] In this embodiment, if Figure 3 As shown, the pressurizing mechanism includes a first pressurizing plate 53 and / or a second pressurizing plate 55 . The first pressurizing plate 53 and the second pressurizing plate 55 have a height difference, and a rib 54 is provided between the first pressurizing plate 53 and the second pressurizing plate 55 .

[0056] In a preferred case, the top of the dilution tank 2 is an open end, and the top of the dilution tank 2 is detachably connected to the tank cover 1, specifically, it can be connected by bolts, and the rotating telescopic assembly is installed on the tank cover 1; specifically, the turntable is arranged on the tank cover 1, the motor 31 is arranged on the outer wall of the tank cover 1, and the telescopic member 4 passes through the tank cover 1 and is connected to the filter press plate 52.

[0057] Preferably, a sampling port 11 is provided on the tank cover 1 , and samples can be taken from the collecting tank 51 through the sampling port 11 . Specifically, the sampling tube can pass through the sampling port 11 and enter the collecting tank 51 .

[0058] Embodiment 2: This embodiment is based on the embodiment 1, and the difference from the embodiment is that the structure of the pressurizing mechanism is different, such as Figure 4 As shown, the outer wall of the collecting tank 51 is provided with an annular pressure plate 57 and / or a second pressure plate 55 ; the annular pressure plate 57 and the second pressure plate 55 have a height difference, and a plurality of ribs 54 are provided between the annular pressure plate 57 and the second pressure plate 55 .

[0059] Embodiment 3: This embodiment is based on the embodiment 1, and the difference from the embodiment is that the shape of the collecting tank 51 is different, such as Figure 6 As shown, the collecting groove 51 comprises a groove of equal diameter.

[0060] Preferably, a pressurizing mechanism as described in Example 1 or Example 2 is provided on the outer wall of the collecting tank 51 .

[0061] Embodiment 4: This embodiment is based on embodiment 1. like Figure 7 As shown, the side wall of the dilution tank 2 of this embodiment is provided with a liquid inlet 24 and a feed plate 25; the liquid inlet 24 is used to automatically convey water into the dilution tank 2, and the feed plate 25 is used to automatically introduce soil into the dilution tank 2. Preferably, the feed plate 25 is arranged inclined to facilitate material guiding.

[0062] In this embodiment, automatic feeding can be achieved.

[0063] Preferably, the detection system further comprises a feeding mechanism 7, which is used to feed the soil to the feeding plate 25, and the feeding mechanism 7 is provided with a microwave heating mechanism. The microwave heating mechanism is a prior art and can be provided on the side wall of the feeding mechanism 7. The microwave generated by the microwave heating mechanism can penetrate the soil, causing cracks inside the soil, which is beneficial to subsequent stirring and mixing, that is, it can better achieve the dissolution of potassium in the soil.

[0064] Embodiment 5: An analytical method for instant potassium sulfate soil analysis comprises the following steps: S1. Soil sampling: Take the same amount of soil from 5-10 different locations and mix them evenly. The sampling depth is 5-20cm. This sampling method can improve the accuracy of sampling and help improve the accuracy of soil testing. S2. Soil pretreatment: The soil is dried, crushed and sieved in sequence to make the particle size of the soil to be tested uniform; the pretreated soil is conducive to the dissolution of potassium in the subsequent soil dilution and filtration; S3, soil dilution filtration: using the detection system of any one of Examples 1-4 to treat the soil to obtain a filtrate, which is used for subsequent analysis and detection; S4. Analysis: The potassium content in the filtrate is detected by a detection unit, and the potassium content in the soil is analyzed based on the potassium content in the filtrate. A pH meter can also be used to detect the pH value of the filtrate to analyze the acidity and alkalinity of the soil.

[0065] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0066] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A detection system for instant potassium sulfate soil analysis, comprising a dilution tank (2) and a detection unit for soil analysis, characterized in that: The detection system also includes: A telescopic stirring mechanism (6) is disposed in the dilution tank (2), comprising an upper stirring mechanism (61) and a lower stirring mechanism (63), wherein the upper stirring mechanism (61) and the lower stirring mechanism (63) are connected via a spring (62); A filter press mechanism (5) is used to filter the diluted soil solution and collect the filtrate; it comprises a collecting trough (51), the top of the collecting trough (51) extending outwards to form a filter press plate (52), and the collecting trough (51) is connected to the upper stirring mechanism (61); The rotating telescopic assembly is used to drive the filter press mechanism (5) to rotate and move vertically; when the filter press mechanism (5) moves downward, it filters and collects the filtrate and can squeeze and filter the filtered soil.

2. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The dilution tank (2) comprises, from top to bottom, a stirring section (21) and a filter press section (22); the inner diameter of the stirring section (21) is larger than the inner diameter of the filter press section (22); The outer diameter of the filter press plate (52) is equal to the inner diameter of the filter press section (22).

3. A detection system for instant potassium sulfate soil analysis according to claim 2, characterized in that: The bottom of the filter press section (22) is a necking section (23), and the inner diameter of the bottom of the necking section (23) is greater than or equal to the maximum width of the lower stirring mechanism (63).

4. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The filter press plate (52) comprises an outer fixing ring (521) and an inner fixing ring (522); the outer fixing ring (521) and the inner fixing ring (522) are connected via a plurality of connecting plates (523); and a filter screen (524) is provided between the connecting plates (523), the outer fixing ring (521), and the inner fixing ring (522).

5. A detection system for instant potassium sulfate soil analysis according to claim 4, characterized in that: The connecting plate (523) is provided with a connecting piece (525) for connecting to a rotating and telescopic assembly.

6. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The outer wall of the collecting tank (51) is provided with a pressurizing mechanism, which is used to pressurize the filtered soil, and the pressurizing mechanism is composed of at least one pressurizing plate.

7. A detection system for instant potassium sulfate soil analysis according to claim 6, characterized in that: The pressurizing mechanism comprises a first pressurizing plate (53) and / or a second pressurizing plate (55), the first pressurizing plate (53) and the second pressurizing plate (55) having a height difference, and a rib (54) is provided between the first pressurizing plate (53) and the second pressurizing plate (55).

8. A detection system for instant potassium sulfate soil analysis according to claim 6, characterized in that: The outer wall of the collecting tank (51) is provided with an annular pressure plate (57) and / or a second pressure plate (55); there is a height difference between the annular pressure plate (57) and the second pressure plate (55), and a plurality of ribs (54) are provided between the annular pressure plate (57) and the second pressure plate (55).

9. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The collecting groove (51) comprises a groove of equal diameter or a groove of variable diameter. When the collecting groove (51) is a groove of variable diameter, the inner diameter of the collecting groove (51) tends to gradually decrease from top to bottom.

10. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The side wall of the dilution tank (2) is provided with a liquid inlet (24) and a feed plate (25); the feed plate (25) is arranged at an angle; The detection system further comprises a feeding mechanism (7), wherein the feeding mechanism (7) is used to feed soil to the feeding plate (25), and the feeding mechanism (7) is provided in cooperation with a microwave heating mechanism.

11. A detection system for instant potassium sulfate soil analysis according to claim 1, characterized in that: The rotary telescopic assembly comprises a driving mechanism (3), a rotating disk and a telescopic member (4); The driving mechanism (3) is used to drive the turntable to rotate; the fixed end of the telescopic member (4) is connected to the bottom of the turntable; and the telescopic end of the telescopic member (4) is connected to the filter pressing mechanism (5).

12. A detection system for instant potassium sulfate soil analysis according to any one of claims 1 to 11, characterized in that: The top of the dilution tank (2) is an open end, and the top of the dilution tank (2) is detachably connected to a tank cover (1), and the rotating telescopic assembly is mounted on the tank cover (1); a sampling port (11) is provided on the tank cover (1).

13. An analysis method based on the detection system according to any one of claims 1 to 12, characterized in that: The following steps are involved: S1. Soil sampling: Take the same amount of soil from 5-10 different locations and mix them evenly. The sampling depth is 5-20cm; S2. Soil pretreatment: drying, crushing and sieving the soil in sequence to make the particle size of the soil to be tested uniform; S3, soil dilution filtration: treating the soil with the detection system according to any one of claims 1 to 12 to obtain a filtrate; S4. Analysis: The potassium content in the filtrate is detected by a detection unit, and the potassium content in the soil is analyzed based on the potassium content in the filtrate.

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