A device for detecting the content of nitrogen, phosphorus and potassium in soil

Abstract

The utility model relates to detection device technical field, concretely relates to a detection device for soil nitrogen phosphorus potassium content, including nitrogen phosphorus potassium sensor and setting on nitrogen phosphorus potassium sensor's connecting wire, one end fixed mounting of connecting wire has detection instrument, through the semicircle cleaning scraper hole of cleaning component, the lower end fixed mounting of nitrogen phosphorus potassium sensor has metal probe, through compression telescopic spring, when metal probe pulls out, the elastic force of telescopic spring pushes down and moves first cleaning rod and second cleaning rod, makes semicircle cleaning scraper hole automatic cleaning of metal probe outer wall soil soil impurity, need not manual additional operation, avoid the problem that manual wiping cleaning exists not in time, thereby lead to soil and other impurities solidification on the outer wall of metal probe, prevent the subsequent cleaning difficulty increases greatly, thereby influence detection equipment's accuracy and use efficiency, reduce overall detection effect finally.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to a device for detecting the content of nitrogen, phosphorus and potassium in soil. Background Technology

[0002] Nitrogen (N), phosphorus (P), and potassium (K) in soil are the three essential elements for plant growth and development. Their content directly determines soil fertility, crop yield and quality, and is also related to agricultural non-point source pollution such as eutrophication of water bodies and ecological environment safety caused by excessive nitrogen and phosphorus loss. Soil nitrogen, phosphorus, and potassium content detection devices are core tools for accurately obtaining these indicators.

[0003] In existing technologies, the detection of the three core nutrients in soil—nitrogen (N), phosphorus (P), and potassium (K)—generally employs a multi-probe synchronous insertion method through sensor detection. The core components of the detection device are three independent metal probes and a dedicated nitrogen, phosphorus, and potassium sensor built into the device. Each metal tube is matched with a sensor for detecting a single element, nitrogen, phosphorus, or potassium, ensuring that the detection signals of each element are collected independently and that the outer wall of the metal tube is in full contact with the soil particles, thereby detecting the nitrogen, phosphorus, and potassium elements in the soil.

[0004] However, there are some drawbacks: In actual operation, the soil is usually loose and moist. When the metal probe is inserted into the soil to detect the content of nitrogen, phosphorus and potassium elements, soil and other impurities will inevitably adhere to the outer wall of the metal probe on the detection device. These soil and impurities need to be wiped clean manually, but manual wiping is often not timely. Once the impurities solidify on the outer wall of the metal probe, the difficulty of subsequent cleaning increases significantly, thereby affecting the accuracy and efficiency of the detection equipment and ultimately reducing the overall detection effect. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a device for detecting the content of nitrogen, phosphorus and potassium in soil, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a device for detecting the content of nitrogen, phosphorus and potassium in soil, including a nitrogen, phosphorus and potassium sensor and a connecting wire disposed on the nitrogen, phosphorus and potassium sensor. A detection instrument is fixedly installed at one end of the connecting wire, and a metal probe is fixedly installed at the lower end of the nitrogen, phosphorus and potassium sensor. A cleaning component is disposed on the outside of the metal probe to clean the soil on the outside of the metal probe. The cleaning component includes a mounting block with a through hole inside. A fixing sleeve is fixedly fitted inside the fixing hole, and a guide groove is provided inside one side of the mounting block.

[0007] Furthermore, a telescopic spring is fixedly installed inside the upper part of the fixed sleeve, and a connecting post is fixedly installed at the lower end of the telescopic spring. A first cleaning rod and a second cleaning rod are fixedly installed on the outer wall of the connecting post, and a semi-circular cleaning scraping hole is opened inside the first cleaning rod and the second cleaning rod.

[0008] Furthermore, a guide strip is slidably fitted inside the guide groove, and one end of the guide strip is fixedly installed on the outer wall of the connecting column near one side.

[0009] Furthermore, a connecting pin is sleeved through the interior of the first and second cleaning rods, and locking nuts are rotatably tightened at both ends of the connecting pin. The interior of the semi-circular cleaning scraping hole is in close contact with the outer wall of the metal probe, and an elastic clamp is fixedly installed on one side of the mounting block.

[0010] Furthermore, the nitrogen, phosphorus, and potassium sensor includes a first outer shell and a second outer shell. The inner side of the elastic clamp is fitted onto the outer wall of the first and second outer shells. The first outer shell has slots equidistantly arranged on one side near both ends. The inner wall of the second outer shell has a nesting on one side, and the nesting is fitted onto the outer wall of the first outer shell.

[0011] Furthermore, a sealing strip is bonded to the gap between the first outer shell and the second outer shell. The outer wall of the sealing strip contacts the inner side of the elastic clamp, and one end of the elastic clamp is inserted into the groove of the first outer shell.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. This utility model utilizes a semi-circular cleaning scraper hole in the cleaning component. By compressing a telescopic spring, when the metal probe is pulled out, the elastic force of the telescopic spring pushes the first and second cleaning rods downwards, allowing the semi-circular cleaning scraper hole to automatically clean the soil and impurities on the outer wall of the metal probe. This eliminates the need for additional manual operation and avoids the problem of untimely manual wiping, which can cause soil and other impurities to solidify on the outer wall of the metal probe, significantly increasing the difficulty of subsequent cleaning and affecting the accuracy and efficiency of the testing equipment, ultimately reducing the overall testing effect.

[0013] 2. Simultaneously, the sealing strip is affixed to the gap between the two housings of the nitrogen, phosphorus, and potassium sensor. The sealing strip effectively prevents external dust, moisture, and other substances from entering the sensor housing. The elastic clamp is fitted onto the outer wall of the sensor housing, and the elastic clamp applies further pressure to the sealing strip, making the seal between the sealing strip and the housing gap even tighter. This prevents external dust, moisture, and other substances from entering the sensor housing, and prevents internal electronic components from malfunctioning or being damaged due to moisture or dust accumulation. This ensures that the accuracy of the nitrogen, phosphorus, and potassium sensor in soil detection is not affected. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cleaning component and connecting wire structure of this utility model; Figure 3 This is a schematic diagram of the first and second outer shells, elastic clamps, and sealing strips of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the cleaning component of this utility model.

[0016] The labels in the diagram represent: 1. Nitrogen, phosphorus, and potassium sensor; 11. First housing; 12. Second housing; 13. Slot; 14. Nesting; 3. Connecting wire; 4. Detection instrument; 5. Metal probe; 6. Cleaning assembly; 61. Mounting block; 62. Telescopic spring; 63. Fixing sleeve; 64. Guide strip; 65. Connecting post; 66. First cleaning rod; 67. Second cleaning rod; 68. Fixing hole; 69. Guide groove; 611. Semi-circular cleaning scraping hole; 612. Connecting pin; 613. Locking nut; 7. Elastic clamp; 71. Sealing strip. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments. Example 1:

[0019] Reference Figures 1 to 4This first embodiment of the present invention discloses a device for detecting the content of nitrogen, phosphorus, and potassium in soil. It includes a nitrogen, phosphorus, and potassium sensor 1 and a connecting wire 3 mounted on the sensor 1. A detection instrument 4 is fixedly installed at one end of the connecting wire 3, and a metal probe 5 is fixedly installed at the lower end of the sensor 1. A cleaning component 6 is provided on the outside of the metal probe 5 to clean the soil on the outside of the metal probe 5. The soil nitrogen, phosphorus, and potassium content detection device is mainly based on the principle of ion-selective electrode (a common principle of the nitrogen, phosphorus, and potassium sensor 1). The metal probe 5 in the nitrogen, phosphorus, and potassium sensor 1 acts as an ion-selective electrode, where different ions generate different potential differences on the electrode surface. When the metal probe 5 is inserted into the soil, the nitrogen, phosphorus, and potassium ions in the soil interact with the probe surface, generating an electrical signal related to the ion concentration. The detection instrument 4 receives the electrical signal from the nitrogen, phosphorus, and potassium sensor 1 through the connecting line 3. After the internal signal processing circuit, the electrical signal is converted into a displayable digital signal. The nitrogen, phosphorus, and potassium sensor 1 and the detection instrument 4 are common in the prior art and will not be described in detail here. Thus, the content of nitrogen, phosphorus, and potassium in the soil can be obtained. Common models of nitrogen, phosphorus, and potassium sensor 1 and detection instrument 4 include SDI-12 nitrogen, phosphorus, and potassium sensor 1, Dutch SenseCAP soil nitrogen, phosphorus, and potassium sensor 1, and Top Cloud Agriculture TPS-2 soil nutrient analyzer. The cleaning component 6 includes a mounting block 61. A fixing hole 68 is formed through the interior of the mounting block 61. A fixing sleeve 63 is fixedly fitted inside the fixing hole 68. A guide groove 69 is formed inside one side of the mounting block 61. A telescopic spring 62 is fixedly installed at the upper end of the interior of the fixing sleeve 63. A connecting post 65 is fixedly installed at the lower end of the telescopic spring 62. A first cleaning rod 66 and a second cleaning rod 67 are fixedly installed on the outer wall of the connecting post 65. A semi-circular cleaning scraping hole 611 is formed inside the first cleaning rod 66 and the second cleaning rod 67. A guide strip 64 is slidably fitted inside the guide groove 69. One end of the guide strip 64 is fixedly installed on the outer wall of the connecting post 65 at one side.

[0020] The first cleaning rod 66 and the second cleaning rod 67 are internally fitted with connecting pins 612. The two ends of the connecting pins 612 are screwed with locking nuts 613. The first cleaning rod 66 and the second cleaning rod 67 are fitted together through the connecting pins 612 and the two ends are screwed with locking nuts 613 to ensure that the two are in a stable position and that the semi-circular cleaning scraping hole 611 can accurately correspond to the metal probe 5. The interior of the semi-circular cleaning scraping hole 611 is in close contact with the outer wall of the metal probe 5. An elastic clamp 7 is fixedly installed on one side of the mounting block 61.

[0021] In use, align the metal probe 5 of the nitrogen, phosphorus, and potassium sensor 1 with the soil and begin inserting it downwards. As the metal probe 5 penetrates the soil, its lower end contacts the lower ends of the first cleaning rod 66 and the second cleaning rod 67. Because the metal probe 5 continues to penetrate the soil, it generates an upward thrust on the first cleaning rod 66 and the second cleaning rod 67, causing the connecting column 65 to move upwards. During the upward movement of the connecting column 65, the telescopic spring 62 is compressed, and simultaneously, the guide strip 64 slides upwards within the guide groove 69, ensuring the linearity of the connecting column 65's movement. The first cleaning rod 66 and... As the connecting post 65 moves upward, the second cleaning rod 67's internal semi-circular cleaning scraping hole 611 remains in contact with the outer wall of the metal probe 5. When the metal probe 5 is pulled out of the soil, as it moves upward, the elastic force generated by the compression of the telescopic spring 62 pushes the connecting post 65 downward. The connecting post 65 then drives the first cleaning rod 66 and the second cleaning rod 67 downward. The semi-circular cleaning scraping hole 611 cleans the outer wall of the metal probe 5, further scraping away the attached impurities and soil, ensuring that the surface of the metal probe 5 is clean after it is pulled out of the soil. Example 2:

[0022] Reference Figures 1 to 3 This is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: the nitrogen, phosphorus, and potassium sensor 1 includes a first outer shell 11 and a second outer shell 12. The inner side of the elastic clamp 7 is fitted onto the outer wall of the first outer shell 11 and the second outer shell 12. The first outer shell 11 has slots 13 evenly spaced on one side near both ends. The inner wall of the second outer shell 12 has a nest 14 on one side. The inside of the nest 14 is fitted onto the outer wall of the first outer shell 11. A sealing strip 71 is pasted and connected between the first outer shell 11 and the second outer shell 12. The outer wall of the sealing strip 71 contacts the inner side of the elastic clamp 7. One end of the elastic clamp 7 is inserted into the slot 13 of the first outer shell 11.

[0023] In use, firstly, the nesting 14 of the second housing 12 of the nitrogen, phosphorus, and potassium sensor 1 is fitted onto the outer wall of the first housing 11, so that the two housings are initially assembled together. Then, the sealing strip 71 is pasted into the gap between the first housing 11 and the second housing 12, ensuring that the sealing strip 71 can completely cover the gap and play a good sealing role. The elastic clamp 7 is fitted onto the outer wall of the first housing 11 and the second housing 12, and the position is adjusted so that the inner side of the elastic clamp 7 contacts the outer wall of the sealing strip 71, which plays a role in further pressing the sealing strip 71. Then, one end of the elastic clamp 7 is inserted into the slot 13 that is equidistantly opened at both ends on one side of the first housing 11, ensuring that the elastic clamp 7 is firmly fixed on the two housings, thus completing the assembly of the entire housing.

[0024] The remaining structure is the same as that in Example 1.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting the content of nitrogen, phosphorus, and potassium in soil, characterized in that: Includes a nitrogen, phosphorus and potassium sensor (1) and a connecting line (3) set on the nitrogen, phosphorus and potassium sensor (1). A detection instrument (4) is fixedly installed at one end of the connecting line (3). A metal probe (5) is fixedly installed at the lower end of the nitrogen, phosphorus and potassium sensor (1). A cleaning component (6) is set on the outside of the metal probe (5). The cleaning component (6) is used to clean the soil on the outside of the metal probe (5). The cleaning component (6) includes a mounting block (61), a fixing hole (68) is provided through the interior of the mounting block (61), a fixing sleeve (63) is fixedly sleeved inside the fixing hole (68), and a guide groove (69) is provided inside one side of the mounting block (61).

2. The device for detecting the content of nitrogen, phosphorus, and potassium in soil according to claim 1, characterized in that, A telescopic spring (62) is fixedly installed at the upper end of the inside of the fixed sleeve (63). A connecting post (65) is fixedly installed at the lower end of the telescopic spring (62). A first cleaning rod (66) and a second cleaning rod (67) are fixedly installed on the outer wall of the connecting post (65). A semi-circular cleaning scraping hole (611) is opened inside the first cleaning rod (66) and the second cleaning rod (67).

3. The device for detecting the content of nitrogen, phosphorus, and potassium in soil according to claim 1, characterized in that, The guide groove (69) is slidably fitted with a guide strip (64), and one end of the guide strip (64) is fixedly installed on the outer wall of the connecting column (65) near one side.

4. The device for detecting the content of nitrogen, phosphorus, and potassium in soil according to claim 2, characterized in that, The first cleaning rod (66) and the second cleaning rod (67) are fitted with connecting pins (612) through the interior. The two ends of the connecting pins (612) are tightened with locking nuts (613). The interior of the semi-circular cleaning scraping hole (611) is in close contact with the outer wall of the metal probe (5). An elastic clamp (7) is fixedly installed on one side of the mounting block (61).

5. The device for detecting the content of nitrogen, phosphorus, and potassium in soil according to claim 4, characterized in that, The nitrogen, phosphorus and potassium sensor (1) includes a first shell (11) and a second shell (12). The inner side of the elastic clamp (7) is sleeved on the outer wall of the first shell (11) and the second shell (12). The first shell (11) has slots (13) arranged at equal intervals on one side near both ends. The inner wall of the second shell (12) has a nest (14) on one side. The inside of the nest (14) is sleeved on the outer wall of the first shell (11).

6. The device for detecting the content of nitrogen, phosphorus, and potassium in soil according to claim 5, characterized in that, A sealing strip (71) is pasted and connected between the first outer shell (11) and the second outer shell (12). The outer wall of the sealing strip (71) contacts the inner side of the elastic clamp (7). One end of the elastic clamp (7) is inserted into the groove (13) of the first outer shell (11).

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