A quantitative fertilizer discharge device based on magnetic levitation technology

Abstract

This application relates to a quantitative fertilizer discharge device based on magnetic levitation technology. It includes a metering mechanism comprising a discharge pipe, a magnetic levitation core, and a detection unit. A movable valve plate is movably installed inside the discharge pipe. The magnetic levitation core includes a magnetic levitation base and a float. The magnetic levitation base is positioned below the discharge pipe, and the float is fixedly installed at the bottom of the valve plate. The detection unit is connected to a controller of the magnetic levitation core. This application utilizes a magnetic field generated by the magnetic levitation base to drive the float, which in turn suspends the valve plate within the discharge pipe. After fertilizer enters the discharge pipe, the valve plate is pressed down and sinks. When the valve plate sinks a set distance, the base is de-energized and demagnetized, causing the valve plate to fall and the fertilizer to be discharged from its lower end. This process repeats continuously, achieving continuous fertilizer discharge. The amount of fertilizer discharged each time depends only on the quality of the fertilizer, eliminating the influence of fertilizer fluffiness and effectively ensuring the accuracy of each discharge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery equipment, in particular to a quantitative fertilizer discharge device based on magnetic suspension technology. BACKGROUND

[0002] In agricultural production, precision variable rate fertilization technology can implement variable application of fertilizers according to soil nutrient content due to its unique advantages. This aims to meet the needs of crop growth, thereby achieving significant improvement of fertilizer utilization rate, saving fertilizer consumption and reducing pollution degree of water and soil.

[0003] The existing fertilizer amount detection device has great dependence on fertilizer types, and needs to calibrate the fertilizer. Due to errors in the calibration process, the detection is inaccurate.

[0004] For example, the patent with application number CN2018104802315 specifically discloses a variable fertilizer discharge device for orchard hole fertilization. Valves are arranged on the upper and lower sides of a fertilizer storage cavity. The fertilizer storage cavity is filled with fertilizer and discharged by alternately opening the two valves. The fertilizer amount of each time is the amount of fertilizer that the fertilizer storage cavity can accommodate. The mass of different fertilizers is different under the same volume. Therefore, the mass of the fertilizer under a certain volume needs to be calibrated before use. When the fertilizer is damp, the fertilizer is compact. When the fertilizer is dry, the fertilizer is fluffy. The fertilizer amount under the same volume is greatly different, which is not conducive to precision fertilization. SUMMARY

[0005] To solve or partially solve the problems in the related art, the present application provides a quantitative fertilizer discharge device based on magnetic suspension technology, aiming to solve the technical problem of inaccurate fertilizer amount.

[0006] A quantitative fertilizer discharge device based on magnetic suspension technology, comprising a metering mechanism, the metering mechanism comprising a fertilizer discharge pipe, a valve plate movably mounted in the fertilizer discharge pipe; a magnetic suspension movement, the magnetic suspension movement comprising a magnetic suspension base, a float; the magnetic suspension base is arranged below the fertilizer discharge pipe, and the float is fixedly installed at the bottom of the valve plate;

[0007] and a detection unit for detecting the sinking distance of the float, the detection unit being connected with the controller of the magnetic suspension movement;

[0008] Wherein, the fertilizer falls along the fertilizer discharge pipe to the valve plate, the valve plate sinks under pressure, when the sinking distance of the valve plate reaches the set distance, the magnetic suspension base loses power and loses magnetism, the float and the valve plate slide downward and are separated from the fertilizer discharge pipe, and then the fertilizer is completely discharged, then the magnetic suspension base is powered on again to drive the float to move upward, and then the valve plate is pushed into the fertilizer discharge pipe.

[0009] Optionally, in some schemes, the detection unit comprises a laser ranging sensor fixedly installed on one side of the fertilizer discharging pipe and a reflector, the reflector is fixedly connected with the float through a connecting rod penetrating through the side wall of the fertilizer discharging pipe, and the fertilizer discharging pipe is provided with a relief hole matched with the connecting rod.

[0010] The light emitted by the laser ranging sensor is irradiated on the reflector.

[0011] Optionally, in some schemes, the top of the valve plate is conical.

[0012] Optionally, in some schemes, the Y-shaped fertilizer feeding pipe is further provided, two ends of the Y-shaped fertilizer feeding pipe are connected with the fertilizer discharging pipes of the metering mechanisms respectively, the intersection of the Y-shaped fertilizer feeding pipe is provided with a valve plate, the valve plate is driven to rotate by a motor, the motor is connected with the controller of the magnetic suspension movement core, when one of the magnetic suspension bases is powered off, the motor drives the valve plate to rotate to the magnetic suspension base which is powered off, and then the fertilizer is guided into the other metering mechanism.

[0013] Optionally, in some schemes, a guide rod coaxial with the fertilizer discharging pipe is fixedly installed in the fertilizer discharging pipe, and the float is slidably connected with the guide rod.

[0014] Optionally, in some schemes, the bottom of the guide rod is provided with a supporting rod, one end of the supporting rod is fixedly connected with the guide rod, and the other end is fixedly connected with the inner side wall of the fertilizer discharging pipe.

[0015] Optionally, in some schemes, the fertilizer discharging pipe comprises a left side and a right side, the left side and the right side are opened or closed to two sides through a driving mechanism, and the driving mechanism is electrically connected with the controller of the magnetic suspension movement core.

[0016] Optionally, in some schemes, the driving mechanism adopts an electric clamp, and two clamping jaws of the electric clamp are fixedly connected with the left side and the right side respectively.

[0017] Optionally, in some schemes, a Y-shaped fertilizer discharging pipe is further provided, two ends of the fertilizer discharging pipe are respectively provided with a collecting cavity.

[0018] The bottom of the magnetic suspension base and the fertilizer discharging pipe is arranged in the collecting cavity, and a gap exists between the magnetic suspension base and the inner wall of the collecting cavity.

[0019] Optionally, in some schemes, the fertilizer discharging pipe and the magnetic suspension base are connected with each other through a connecting plate, the lower end surface of the fertilizer discharging pipe is uniformly and spacedly provided with connecting rods, the lower end of the connecting rod is provided with a supporting frame, one end of the fertilizer discharging net bag is fixedly connected with the connecting plate, the end of the fertilizer discharging net bag and the connecting plate enclose a fertilizer discharging cavity, and the supporting frame is arranged in the fertilizer discharging cavity.

[0020] The technical scheme provided by the application can have the following beneficial effects: the application generates a magnetic field through the magnetic suspension base to drive the float to suspend the valve plate in the fertilizer discharge pipe. After the fertilizer enters the fertilizer discharge pipe, the valve plate sinks under pressure. When the sinking distance of the valve plate reaches a set distance, the base loses magnetism after power-off, the valve plate falls, and the fertilizer in the fertilizer discharge pipe is discharged from the lower end thereof. In this way, the continuous fertilizer discharge operation is realized. The amount of fertilizer discharged each time is only related to the mass of the fertilizer, eliminating the influence of the bulkiness of the fertilizer and effectively ensuring the accuracy of the amount of fertilizer discharged each time.

[0021] Furthermore, the application does not rely on the type of fertilizer to detect the mass flow rate, realizes online detection of the fertilizer amount without calibration, can be used for a fertilizer spreading machine to be connected in the discharge pipe to realize online monitoring of the mass flow rate of the fertilizer, and can also be used for a water-fertilizer integrated device to realize accurate fertilizer solution ratio in fertilizer ratio work during irrigation and fertilization.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the several views, and in which:

[0024] Figure 1 is a structural schematic view of a quantitative fertilizer discharge device shown in an embodiment of the application; Figure 2 is another structural schematic view of a quantitative fertilizer discharge device shown in an embodiment of the application;

[0025] Figure 3 is still another structural schematic view of a quantitative fertilizer discharge device shown in an embodiment of the application;

[0026] Figure 4 is an assembly schematic view of a Y-shaped fertilizer inlet pipe and a metering mechanism shown in an embodiment of the application;

[0027] Figure 5 is an assembly schematic view of a fertilizer outlet pipe and a metering mechanism shown in an embodiment of the application;

[0028] Figure 6 is an assembly schematic view of a Y-shaped fertilizer inlet pipe, a fertilizer outlet pipe and a metering mechanism shown in an embodiment of the application;

[0029] Figure 7 is an assembly schematic view of a guide rod and a fertilizer discharge pipe shown in an embodiment of the application;

[0030] Figure 8is an assembly schematic diagram of the guide rod and the limiting platform shown in the embodiments of the present application;

[0031] Figure 9 is an assembly schematic diagram of the guide rod and the supporting rod shown in the embodiments of the present application;

[0032] Figure 10 is a structural schematic diagram of the metering mechanism shown in the embodiments of the present application;

[0033] Figure 11 is another structural schematic diagram of the metering mechanism shown in the embodiments of the present application;

[0034] Figure 12 is still another structural schematic diagram of the metering mechanism shown in the embodiments of the present application;

[0035] Figure 13 is still another structural schematic diagram of the metering mechanism shown in the embodiments of the present application;

[0036] Figure 14 is an assembly schematic diagram of the fertilizer outlet net bag shown in the embodiments of the present application;

[0037] Figure 15 is another assembly schematic diagram of the fertilizer outlet net bag shown in the embodiments of the present application;

[0038] Figure 16 is an installation structural schematic diagram of the connecting rod shown in the embodiments of the present application;

[0039] Figure 17 is a control circuit diagram of the metering mechanism shown in the embodiments of the present application;

[0040] Reference signs:

[0041] 1, metering mechanism; 11, fertilizer discharge pipe; 111, left side; 112, right side; 113, guide part; 114, first opening part;

[0042] 115, second opening part; 12, valve piece; 2, magnetic suspension movement; 21, magnetic suspension base; 211, fertilizer guide cover; 22, float; 3, detection unit; 31, laser distance sensor; 32, reflector; 4, Y-shaped fertilizer inlet pipe; 41, valve plate; 42, motor; 5, guide rod; 51, supporting rod; 52, limiting platform; 6, driving mechanism; 7, fertilizer outlet pipe; 71, collecting cavity; 8, fertilizer outlet net bag; 81, connecting plate; 82, connecting rod; 83, supporting frame; 84, fertilizer discharge cavity. DETAILED DESCRIPTION

[0043] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.

[0044] It should be understood that, although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish information of the same type from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information, without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0045] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0046] Unless otherwise specifically defined and limited, the terms "mount", "connect", "connect", "fix", and the like should be broadly understood, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Please refer to Figures 1-3 and Figure 17 , the present application provides a quantitative fertilizer device based on magnetic suspension technology, which comprises a metering mechanism 1, a magnetic suspension core 2 and a detection unit 3.

[0048] The metering mechanism 1 comprises a fertilizer discharging pipe 11 made of plastic or a material that does not affect the magnetic field, the fertilizer discharging pipe 11 is suspended by an external frame, a valve plate 12 that can move up and down is movably arranged in the fertilizer discharging pipe 11, the outer diameter of the valve plate 12 matches the inner diameter of the fertilizer discharging pipe 11, and then when the valve plate 12 is located in the fertilizer discharging pipe 11, the lower end of the fertilizer discharging pipe 11 is blocked, so that the fertilizer introduced into the fertilizer discharging pipe 11 can be accumulated in the fertilizer discharging pipe 11.

[0049] The magnetic suspension movement 2 comprises a magnetic suspension base 21 and a float 22, the specific model of the magnetic suspension movement 2 can be selected as XN-120 or XN-100, and the specific structure is not described again; the magnetic suspension base 21 is arranged below the fertilizer discharging pipe 11, and the float 22 is fixedly arranged on the bottom of the valve plate 12. The magnetic suspension base 21 generates a magnetic field after being powered on, so as to drive the float 22 and the valve plate 12 arranged on the float 22 to be suspended in the fertilizer discharging pipe 11; the magnetic field disappears after the magnetic suspension base 21 is powered off, and the float 22 and the valve plate 12 fall until they are separated from the fertilizer discharging pipe 11.

[0050] The detection unit 3 is used for detecting the sinking distance of the float 22, and the detection unit 3 is connected with the controller of the magnetic suspension movement 2.

[0051] In work, the fertilizer is introduced into the upper end of the fertilizer discharging pipe 11 by an external device, and then falls along the fertilizer discharging pipe 11 to the valve plate 12, the valve plate 12 sinks under pressure, the detection unit 3 detects the sinking amount of the valve plate 12 in real time, and transmits relevant data to the controller of the magnetic suspension movement 2.

[0052] When the sinking distance of the valve plate 12 reaches a set distance, the magnetic suspension base 21 is powered off to lose magnetism, the float 22 and the valve plate 12 slide downward and are separated from the fertilizer discharging pipe 11, so that the lower end of the fertilizer discharging pipe 11 is in an open state, and then the fertilizer is discharged from the fertilizer discharging pipe 11; then, the magnetic suspension base 21 is powered on again to drive the float 22 to move upward, and then the valve plate 12 is pushed into the fertilizer discharging pipe 11;

[0053] The above-mentioned actions are repeatedly performed, so that the quantitative and accurate fertilizer discharging can be realized.

[0054] The application generates a magnetic field by the magnetic suspension base 21, drives the float 22 to drive the valve plate 12 to be suspended in the fertilizer discharging pipe 11, the fertilizer enters the fertilizer discharging pipe 11, the valve plate 12 sinks under pressure, when the sinking distance of the valve plate 12 reaches a set distance, the base is powered off to lose magnetism, the valve plate 12 falls, the fertilizer in the fertilizer discharging pipe 11 is discharged from the lower end thereof, and the like, so that the accurate measurement of the fertilizer discharging amount is realized.

[0055] The application converts different distance signals into different voltage signals by the detection unit 3. Therefore, the relationship model between the voltage signal and the fertilizer gravity is established, and the online detection of the fertilizer amount is realized.

[0056] That is, different quality acts on the valve piece 12 to produce different pressures, resulting in different distances of the valve piece 12 sinking, so that the electrical signal output by the detection unit 3 is different. The different pressures produced by different amounts of fertilizer acting on the valve piece 12 cause different distances of the valve piece 12 sinking, so that the different signals output by the sensor correspond to the different distances of the valve piece 12 sinking, and a relationship model between the voltage signal and the fertilizer gravity, i.e., a fertilizer amount detection model, is established, so as to realize online detection of the fertilizer amount.

[0057] The different distances of the valve piece 12 sinking correspond to the different signals output by the sensor, and a relationship model between the voltage signal and the fertilizer gravity, i.e., a fertilizer amount detection model, is established, so as to realize online detection of the fertilizer amount.

[0058] Meanwhile, the fertilizer amount of each time is directly set according to the mass of the fertilizer, without the need of calibrating the fertilizer amount of each time in the early stage, and is also irrelevant to the characteristics of different fertilizers, so that the precision of the fertilizer amount of each time is improved. The device can be used for a seeding machine to be connected in a fertilizer discharge pipe to realize online monitoring of the mass flow of the fertilizer, and can also be used for a water-fertilizer integrated device to realize precise fertilizer solution ratio in fertilizer ratio work during irrigation and fertilization operation.

[0059] Optionally, in some specific embodiments, as shown in Figure 1 the detection unit 3 includes a laser distance sensor 31 fixedly installed on one side of the fertilizer discharge pipe 11 and a reflector 32, the reflector 32 is fixedly connected with the float 22 through a connecting rod penetrating the side wall of the fertilizer discharge pipe 11, and the fertilizer discharge pipe 11 is provided with a avoiding hole matched with the connecting rod, the light emitted by the laser distance sensor 31 is irradiated on the reflector 32, and then the distance between the laser distance sensor 31 and the reflector 32 is obtained. In operation, the magnetic suspension base 21 is powered on, when there is no fertilizer on the valve piece 12, the reading of the laser distance sensor 31 is X1, after the fertilizer is introduced into the fertilizer discharge pipe 11, the valve piece 12 is pressed to sink, at this time, the reading of the laser distance sensor 31 is X2, and then the actual sinking distance of the valve piece 12 is X=X1-X2.

[0060] Optionally, in some specific embodiments, as shown in Figure 2 the detection unit 3 adopts proximity switches, the proximity switches are provided with two, one of which corresponds to the position of the valve piece 12 when the magnetic suspension base 21 is powered on and there is no fertilizer on the valve piece 12, and the other of which is matched with the position of the valve piece 12 when the valve piece 12 sinks to a set distance; the valve piece 12 is provided with a detection rod penetrating the side wall of the fertilizer discharge pipe 11 and extending outward, which is used in cooperation with the proximity switches, when the valve piece 12 is pressed to sink to a set position, the detection rod is detected by the proximity switch located below, and then the signal is transmitted to the controller of the magnetic suspension movement 2, the controller controls the magnetic suspension base 21 to be powered off to discharge fertilizer; when the magnetic suspension base 21 is powered on again, the valve piece 12 moves upward to reset, the detection rod is detected by the proximity switch located above, so that the reset detection of the valve piece 12 is realized, and the problem of data error caused by inaccurate reset of the valve piece 12 is avoided.

[0061] Optionally, in some specific embodiments, as shown inFigure 3 The detection unit 3 includes a conductive sheet fixed to the outer circumferential surface of the valve piece 12, and a first detection contact and a second detection contact fixed to the inner side wall of the fertilizer discharge pipe 11. When the valve piece 12 sinks to the set position, the conductive sheet connects the first detection contact and the second detection contact, and further transmits a signal to the controller of the magnetic suspension movement.

[0062] Optionally, in some embodiments, as Figures 1-3 The top of the valve piece 12 is conical. When the valve piece 12 is separated from the fertilizer discharge pipe 11 during fertilizer discharge, the conical top can effectively prevent fertilizer from remaining on the valve piece 12, ensuring clean fertilizer discharge and accurate fertilizer discharge amount each time.

[0063] Optionally, in some embodiments, as Figure 4 The quantitative fertilizer discharge device further includes a Y-shaped fertilizer inlet pipe 4. The Y-shaped fertilizer inlet pipe 4 is invertedly arranged, two lower end outlets are respectively connected with the fertilizer discharge pipes 11 of the metering mechanisms 1, and the remaining upper end is connected with an external fertilizer supply device. A valve plate 41 is arranged at the intersection of the Y-shaped fertilizer inlet pipe 4. The valve plate 41 is driven to rotate by a motor 42. The motor 42 is connected with the controller of the magnetic suspension movement.

[0064] The motor 42 is a servo motor 42 or a stepping motor 42. When one of the magnetic suspension bases 21 is powered off, the motor 42 drives the valve plate 41 to rotate towards the powered-off side magnetic suspension base 21, blocks the channel of the corresponding side Y-shaped fertilizer inlet pipe 4, and guides the fertilizer into the other metering mechanism 1. Through the alternate fertilizer discharge of the two metering mechanisms 1, the continuity of the fertilizer discharge action is improved, and at the same time, the influence of the continuously input fertilizer on the fertilizer discharge amount during the fertilizer discharge process is avoided, and the fertilizer discharge precision of the quantitative fertilizer discharge device is improved.

[0065] Optionally, in some embodiments, as Figure 5 The quantitative fertilizer discharge device further includes a Y-shaped fertilizer outlet pipe 7. Two ends of the fertilizer outlet pipe 7 are respectively provided with collection cavities 71. The magnetic suspension bases 21 and the bottoms of the fertilizer discharge pipes 11 are arranged in the collection cavities 71, and there is a gap between the magnetic suspension bases 21 and the inner walls of the collection cavities 71. Specifically, supports are arranged in the collection cavities 71, and the magnetic suspension bases 21 are installed on the supports, so as to achieve the purpose of installing the magnetic suspension bases 21 in the collection cavities. The magnetic suspension bases 21 can also be connected with the inner walls of the collection cavities 71 through some connecting rods, so as to achieve the purpose of installing the magnetic suspension bases 21 in the collection cavities. The top of the collection cavity 71 is fixedly connected with the fertilizer discharge pipe 11, so as to fix the position of the fertilizer outlet pipe 7.

[0066] When the fertilizer is discharged, the fertilizer spreads to both sides after leaving the valve piece 12, and then is guided downward through the gap between the magnetic suspension base 21 and the inner wall of the collecting cavity 71, and finally is guided outward from the lowermost end of the fertilizer outlet pipe 7, thereby correlating the fertilizer outlets of the two metering mechanisms 1 with each other, and unifying the fertilizer outlet, which facilitates the use of the subsequent fertilizer.

[0067] Optionally, in some specific embodiments, as shown in Figure 6 The two metering mechanisms 1 are correlated through the Y-shaped fertilizer inlet pipe 4 and the fertilizer outlet pipe 7 to realize unified fertilizer inlet and outlet, and the use is more convenient.

[0068] Optionally, in some specific embodiments, as shown in Figures 5-6 The magnetic suspension base 21 is covered with a fertilizer guide cover 211, the middle part of the fertilizer guide cover 211 protrudes upward in a spherical or circular table shape, which effectively avoids the problem that the fertilizer falls on the magnetic suspension base 21 and accumulates, affecting the downward movement of the valve piece 12, and ensures the smooth progress of the fertilizer discharge process, and is also conducive to the stable operation of the magnetic suspension base 21.

[0069] Optionally, in some specific embodiments, as shown in Figure 7 A guide rod 5 coaxial with the fertilizer discharge pipe 11 is fixedly installed in the fertilizer discharge pipe 11, and the float 22 is slidably connected with the guide rod 5. Specifically, the bottom of the float 22 is fixedly installed with a sleeve matched with the guide rod 5, and the upper end of the guide rod 5 is arranged in the sleeve, thereby slidably connecting the float 22 with the guide rod 5 through the sleeve.

[0070] As shown in Figure 8 The connection mode of the float 22 and the valve piece 12 with the guide rod 5 can also be that the lower end of the guide rod 5 is fixedly connected with the magnetic suspension base 21 or the fertilizer guide cover 211, thereby achieving the purpose of fixing the guide rod 5. The middle part of the float 22 and the valve piece 12 is provided with a through hole matched with the outer diameter of the guide rod 5, and the guide rod 5 is arranged in the through hole, thereby achieving the purpose of slidably connecting the float 22 and the valve piece 12 with the guide rod 5.

[0071] The present embodiment guides the float 22 and the valve piece 12 through the guide rod 5, so that they can only move in the vertical direction, thereby effectively avoiding the technical problem that the float 22 and the valve piece 12 are inclined during movement, and further causing the float 22 and the valve piece 12 to fail to reset after the fertilizer is discharged, and ensuring the smoothness of the fertilizer discharge process.

[0072] Optionally, in some specific embodiments, as shown in Figure 8 The guide rod 5 is provided with a limiting table 52, and when the float 22 sinks to the limiting table 52, the limiting table 52 abuts against the float 22, thereby limiting the sinking distance of the float 22 during the fertilizer discharge, avoiding the technical problem that the float 22 cannot reset after the fertilizer is discharged due to excessive sinking of the float 22, and further ensuring the smoothness of the fertilizer discharge process.

[0073] Optionally, in some embodiments, the detection unit 3 adopts a laser ranging sensor 31, which is installed on the limiting table 52 and irradiates upward on the bottom of the float 22, so as to detect the floating distance of the float 22. By calculating the floating distance of the float 22, the specific sinking amount of the float 22 under pressure is obtained, and then the on-off time point of the magnetic suspension base 21 is controlled.

[0074] Optionally, in some embodiments, as shown in Figure 9 The bottom of the guide rod 5 is provided with a supporting rod 51, one end of which is fixedly connected with the guide rod 5, and the other end is fixedly connected with the inner side wall of the fertilizer discharging pipe 11, so as to fix the position of the guide rod 5.

[0075] Optionally, in some embodiments, as shown in Figure 10 The fertilizer discharging pipe 11 includes a left side part 111 and a right side part 112, both of which are in a hollow semicylindrical shape, and are opened or closed to both sides by the driving mechanism 6; the driving mechanism 6 is electrically connected with the controller of the magnetic suspension movement 2.

[0076] When discharging fertilizer, the controller of the magnetic suspension movement 2 controls the magnetic suspension base 21 to be powered off at the same time, and controls the driving mechanism 6 to act, so as to drive the left side part 111 and the right side part 112 to open to both sides, and then make the fertilizer discharging pipe 11 and the valve piece 12 separate from each other in the horizontal direction, so as to improve the efficiency of fertilizer discharge and improve the operation speed of the device.

[0077] Meanwhile, the magnetic suspension movement 2 can also be continuously powered to discharge fertilizer, that is, when the float 22 sinks to the set distance, the driving mechanism 6 directly acts to drive the left side part 111 and the right side part 112 to open to both sides, so as to make the left side part 111 and the right side part 112 separate from the valve piece 12, and the fertilizer directly passes through the gap between the valve piece 12 and the fertilizer discharging pipe 11, so as to achieve the purpose of discharging fertilizer.

[0078] It should be noted that in this embodiment, the fertilizer discharging pipe 11 is entirely placed in the collecting cavity 71, so as to avoid the fertilizer from spilling.

[0079] Optionally, in some embodiments, as shown in Figure 11 and Figure 12As shown, the fertilizer discharge pipe 11 includes a hollow cylindrical guide portion 113, a hollow semi-cylindrical first opening portion 114 and a second opening portion 115, the first opening portion 114 and the second opening portion 115 are arranged in the collection cavity 71, the guide portion 113 is fixedly connected with the top of the collection cavity 71, the first opening portion 114 and the second opening portion 115 are respectively hingedly connected with the lower end of the guide portion 113, and the first opening portion 114 and the second opening portion 115 jointly form a hollow cylindrical structure with the same diameter as the guide portion 113.

[0080] Optionally, in some embodiments, as shown in Figure 10 As shown, the driving mechanism 6 adopts an electric clamp, two clamping jaws of the electric clamp are respectively fixedly connected with the left side portion 111 and the right side portion 112, when the electric clamp operates, the left side portion 111 and the right side portion 112 are respectively opened to two sides, and then the fertilizer discharge pipe 11 and the valve plate 12 are separated from each other in the horizontal direction, thereby improving the efficiency of fertilizer discharge.

[0081] Optionally, in some embodiments, as shown in Figure 12 As shown, the driving mechanism 6 can also adopt a linear driving element such as a pneumatic cylinder or an electric telescopic rod, one end of the electric telescopic rod is fixedly connected with the first opening portion 114 or the second opening portion 115, and the other end is fixedly connected with the inner side wall of the collection cavity 71, when the electric telescopic rod operates, the left side portion 111 and the right side portion 112 are respectively opened to two sides, and then the fertilizer discharge pipe 11 and the valve plate 12 are separated from each other in the horizontal direction, thereby improving the efficiency of fertilizer discharge.

[0082] Optionally, in some embodiments, as shown in Figure 13 As shown, the present embodiment provides a quantitative fertilizer discharge device, which includes a metering mechanism 1, a magnetic suspension movement 2, a detection unit 3, a Y-shaped fertilizer inlet pipe 4, a guide rod 5, a driving mechanism 6, and a fertilizer outlet pipe 7; the connection forms of the structures are the same as those described in the above embodiments.

[0083] In operation, the fertilizer is introduced from the upper port of the Y-shaped fertilizer inlet pipe 4 by an external feeding device, under the guidance of the valve plate 41, the fertilizer flows into one of the metering mechanisms 1 at the intersection; the fertilizer in the metering mechanism 1 falls along the fertilizer discharge pipe 11 to the valve plate 12 and continuously accumulates on the valve plate 12, the valve plate 12 sinks under pressure, and the detection unit 3 detects the sinking amount of the valve plate 12 in real time, when the sinking amount of the valve plate 12 reaches a set distance, the fertilizer in the fertilizer discharge pipe 11 reaches the required amount of each discharge, and then the detection unit 3 transmits a signal to the controller of the magnetic suspension movement 2. After receiving the signal, the controller of the magnetic suspension movement 2 controls the magnetic suspension movement 2 to be powered off or controls the driving mechanism 6 to operate, discharges the fertilizer, and controls the motor 42 to rotate, drives the valve plate 41 to rotate to the other side, and then makes the introduced fertilizer flow into the other metering mechanism 1, so as to continuously reciprocate the metering and discharging of the fertilizer, and complete the quantitative fertilization task.

[0084] Furthermore, the total fertilizer discharge volume is calculated as follows: when the magnetic levitation mechanism 2 is de-energized, the fertilizer discharge count increments by 1, and the total fertilizer discharge volume can be calculated by counting the number of times. That is, the total fertilizer discharge volume G = single-time set metering value M × number of fertilizer discharges F, where the number of fertilizer discharges is the number of times the magnetic levitation mechanism 2 is de-energized. The single-time set metering value M can be set by setting the distance of descent of the valve plate 12.

[0085] Simultaneously, when the detection unit 3 detects the float 22, the fertilizer discharge count is incremented by 1, and the total fertilizer discharge volume can be calculated by counting the number of times. That is, the total fertilizer discharge volume G = single-time set measurement value M × number of fertilizer discharges F, where the number of fertilizer discharges is the number of times the detection unit 3 detects the float 22. The single-time set measurement value M can be set by setting the distance of the valve plate 12 descent.

[0086] Optionally, in some specific implementations, such as Figure 14 , Figure 15 and Figure 16 As shown, the fertilizer discharge pipe 11 and the magnetic levitation base 21 are connected to each other by a connecting plate 81. The connecting plate 81 is rolled into a conical shape. Connecting rods 82 are evenly spaced on the lower end face of the fertilizer discharge pipe 11. The connecting rods 82 extend along the extension direction of the fertilizer discharge pipe 11. Thus, even after the valve plate 12 is detached from the fertilizer discharge pipe, it can still move vertically downward under the guidance of the connecting rods 82, effectively ensuring that the valve plate 12 can be smoothly reset. A support frame 83 is provided at the lower end of the connecting rods 82. The support frame 83 is used to limit the downward movement distance of the valve plate 12, effectively preventing the technical problem that the valve plate 12 cannot be smoothly reset after detaching from the fertilizer discharge pipe. The support frame 83 has multiple through holes smaller than the valve plate 12 to allow fertilizer to pass through during discharge.

[0087] The fertilizer discharge net bag 8 is made of cloth or rigid plastic tube. One end of the fertilizer discharge net bag 8 is fixedly connected to the connecting plate 81. The end of the fertilizer discharge net bag 8 and the connecting plate 81 form a fertilizer discharge cavity 84, and the support frame 83 is located inside the fertilizer discharge cavity 84. The other end of the fertilizer discharge net bag 8 passes through the connecting plate 81 and extends outward.

[0088] When discharging fertilizer, the magnetic levitation base 21 is de-energized, and the valve plate 12 slides downward under the action of gravity until it is blocked by the support frame 83. The fertilizer on the valve plate 12 slides to its surroundings and enters the fertilizer discharge chamber 84. Then it is discharged through the fertilizer discharge net bag 8, completing the fertilizer discharge action.

[0089] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A quantitative fertilizer discharge device based on magnetic levitation technology, characterized in that: The metering mechanism comprises a fertilizer discharging pipe, in which a valve plate movable up and down is movably installed; the top of the valve plate is conical; The magnetic suspension movement comprises a magnetic suspension base, a float; the magnetic suspension base is arranged below the fertilizer discharging pipe, the float is fixedly installed at the bottom of the valve plate; and a detection unit for detecting the sinking distance of the float is connected with the controller of the magnetic suspension movement; Wherein, the fertilizer falls along the fertilizer discharging pipe to the valve plate, the valve plate sinks under pressure, when the sinking distance of the valve plate reaches the set distance, the magnetic suspension base is powered off and loses magnetism, the float and the valve plate slide down and are separated from the fertilizer discharging pipe, and then the fertilizer is completely discharged, then the magnetic suspension base is powered on again to drive the float to move upward, and then the valve plate is pushed into the fertilizer discharging pipe; It also comprises a Y-shaped fertilizer inlet pipe, two ends of the Y-shaped fertilizer inlet pipe are respectively connected with the fertilizer discharging pipes of the metering mechanisms, a valve plate is arranged at the intersection of the Y-shaped fertilizer inlet pipe, the valve plate is driven to rotate by a motor, and the motor is connected with the controller of the magnetic suspension movement; When one of the magnetic suspension bases is powered off, the motor drives the valve plate to rotate to the powered-off side of the magnetic suspension base, and then the fertilizer is introduced into another metering mechanism; A guide rod coaxial with the fertilizer discharging pipe is fixedly installed in the fertilizer discharging pipe, the float is slidably connected with the guide rod; A supporting rod is arranged at the bottom of the guide rod, one end of the supporting rod is fixedly connected with the guide rod, and the other end is fixedly connected with the inner side wall of the fertilizer discharging pipe; The fertilizer discharging pipe and the magnetic suspension base are connected with each other through a connecting plate; Uniformly spaced connecting rods are arranged on the lower end surface of the fertilizer discharging pipe, a supporting frame is arranged at the lower end of the connecting rod, one end of a fertilizer outlet net bag is fixedly connected with the connecting plate, and the end of the fertilizer outlet net bag and the connecting plate enclose a fertilizer discharging cavity, and the supporting frame is arranged in the fertilizer discharging cavity.

2. The quantitative fertilizer device based on magnetic levitation technology according to claim 1, characterized in that: The detection unit comprises a laser ranging sensor fixedly installed on one side of the fertilizer discharging pipe and a reflecting sheet, the reflecting sheet is fixedly connected with the float through a connecting rod penetrating through the side wall of the fertilizer discharging pipe, and an avoiding hole matched with the connecting rod is arranged on the fertilizer discharging pipe; Wherein, the light emitted by the laser ranging sensor is irradiated on the reflecting sheet.

3. The quantitative fertilizer delivery device based on magnetic levitation technology according to claim 1, characterized in that: The fertilizer discharging pipe comprises a left side and a right side, the left side and the right side are opened or closed to two sides through a driving mechanism; The driving mechanism is electrically connected with the controller of the magnetic suspension movement.

4. The quantitative fertilizer delivery device based on magnetic levitation technology according to claim 3, characterized in that: The driving mechanism adopts an electric clamp, two clamping jaws of the electric clamp are fixedly connected with the left side and the right side respectively.

5. The quantitative fertilizer delivery device based on magnetic levitation technology according to claim 4, characterized in that: It also comprises a Y-shaped fertilizer outlet pipe, two ends of the Y-shaped fertilizer outlet pipe are respectively configured with a collecting cavity; The magnetic suspension base and the bottom of the fertilizer discharging pipe are arranged in the collecting cavity, and a gap exists between the magnetic suspension base and the inner wall of the collecting cavity.

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