Flow self-adaptive nozzle, adjusting method and plant protection machine comprising nozzle

Abstract

The invention belongs to the field of plant protection machine nozzle design, and particularly relates to a flow self-adaptive nozzle, an adjusting method and a plant protection machine comprising the nozzle, and the device is mainly composed of a shell, an inner core, a fixed electromagnet, a movable magnet, a conical sealing head, an elastic sealing sleeve, an adjusting seat and the like. A movable magnet is mounted at the bottom of an inner core and integrally embedded into an adjusting seat, a conical sealing head is mounted at the head of the inner core and clamps an upper opening of an elastic sealing sleeve onto the inner core, a bottom opening of the elastic sealing sleeve is mounted at an upper opening of the adjusting seat, and a fixed electromagnet is mounted at the bottom of the adjusting seat. The opening degree of the nozzle opening can be automatically adjusted according to the liquid medicine flow of the main pipeline controlled by the variable pesticide application system, the flow adaptability of the nozzle is improved, and meanwhile the one-way valve leakage prevention effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of nozzle design for a plant protection machine, and in particular to a flow adaptive nozzle, a regulating method and a plant protection machine comprising the nozzle. Background Art

[0002] In the existing technology, the main operating equipment of plant protection equipment is the sprayer, whose basic function is to disperse the pesticide liquid into mist and attach it to the surface of vegetation. It is mainly used in agriculture, industry and other related fields. It is also a typical mature machinery in plant protection equipment. It has the advantages of high spraying efficiency, better operating effect and a wide range of applications. Its mechanization and intelligence level is related to the spraying operation efficiency and has a relatively important impact on agricultural development.

[0003] The research on spraying control technology of sprayers is of great significance to the realization of precision agricultural pesticide application, the improvement of ecological and natural environment, and the promotion of sustainable development of agricultural operations. It avoids the high-intensity physical exertion of agricultural workers, effectively reduces the threat of pesticide poisoning, and improves the efficiency and quality of field work. At present, there are two main technical routes for spray control systems. One is to use high-frequency nozzles to control the switching frequency and duty cycle of the nozzles to achieve the purpose of accurately controlling the amount of pesticides applied. However, this method is costly and requires high reliability of the nozzles. It is difficult to promote low-end and medium-end plant protection machines. The other method uses flow control to control the spray flow of the plant protection machine by adjusting the main flow control valve. This method is low-cost, but adjusting the flow will change the terminal pipeline flow. Affected by the nozzle characteristics (the nozzle outlet hole can be adjusted), the flow adjustable range of a single nozzle is narrow. If the flow change exceeds the nozzle adaptation range, it will cause problems such as failure to atomize. Therefore, when adjusting the wide range, the nozzle within the corresponding aperture flow range must be replaced, otherwise it will affect the spray quality. The cumbersome operation and poor real-time adjustability affect its promotion and use. Therefore, it is necessary to study a nozzle that can automatically adjust the caliber according to the flow rate in the pipe to improve the adaptability of the spraying system. Summary of the invention

[0004] In order to solve the shortcomings of the prior art, the present invention aims to provide a flow adaptive nozzle of a variable spraying system of a plant protection machine, an adjustment method and a plant protection machine including the nozzle.

[0005] In order to achieve the above object, the specific scheme adopted by the present invention is as follows: In the first aspect, the present invention provides a flow adaptive nozzle, including an outer shell, an inner core, a fixed electromagnet, a movable magnet, a conical sealing head, an elastic sealing sleeve and an adjustment seat; the tail of the inner core is embedded in the adjustment seat, the head of the inner core is equipped with a conical sealing head, the tail of the inner core is equipped with an movable magnet, and the fixed electromagnet is installed inside the adjustment seat, and the relative polarity of the movable magnet and the fixed electromagnet is the same to achieve the purpose of mutual repulsion; the adjustment seat is installed in the outer shell, and a medicine liquid cavity is formed between the outer shell and the adjustment seat; a liquid outlet is provided on the shell, the liquid outlet is connected to the medicine liquid cavity, and the liquid outlet of the liquid outlet is controlled by the moving distance of the conical sealing head along its axial direction.

[0006] As a further technical solution, a cavity is formed inside the adjustment seat, the cavity cooperates with the tail of the inner core, and the front of the inner core extends out of the cavity; the fixed electromagnet is arranged at the bottom of the cavity.

[0007] As a further technical solution, a vent hole is provided on the adjustment seat, and the vent hole is communicated with the cavity.

[0008] As a further technical solution, a liquid inlet hole is provided on the adjustment seat, and a liquid medicine cavity is formed between the liquid inlet hole, the housing, and the adjustment seat to communicate with each other.

[0009] As a further technical solution, the fixed electromagnet is arranged at the center of the adjustment seat, and the magnetic magnitude of the fixed electromagnet can be adjusted.

[0010] As a further technical solution, a movable magnet is installed at the center of the tail of the inner core.

[0011] As a further technical solution, a sealing gasket is arranged between the housing and the adjustment seat.

[0012] As a further technical solution, the conical sealing head and the inner core are clamped together or screwed together through threads.

[0013] In a second aspect, the present invention further provides a plant protection machine, including a spraying system, wherein the spraying system includes the flow adaptive nozzle described above.

[0014] In a third aspect, the present invention further provides a control method based on the above-mentioned flow adaptive nozzle, which is as follows: When the spraying system is not turned on, the liquid medicine will flow into the liquid medicine cavity between the adjustment seat and the shell through the nozzle pipeline. Under no pressure, the inner core will be subject to its own gravity and the repulsive force of the two magnets, causing the conical sealing head of the inner core to be pressed tightly against the liquid outlet of the shell to form a sealed environment to prevent the liquid medicine from leaking out. When the plant protection machine starts to work and the spraying system is gradually opened, as the liquid pressure in the liquid chamber increases, the inner core moves upward under the pressure of the liquid, and then moves upward with the conical sealing head, thereby opening the liquid outlet of the shell, and the liquid is sprayed out from the liquid outlet in atomized form; When the flow rate is reduced by adjusting the flow valve of the main flow line of the pesticide application system, the pressure in the cavity is reduced accordingly, and the inner core will move downward until the pressure in the cavity is balanced with its own gravity and the repulsive force of the two magnets. At this time, the opening of the liquid outlet is reduced accordingly, effectively ensuring the atomization of the liquid medicine; conversely, when the flow rate is increased by adjusting the flow valve, the pressure in the cavity is increased accordingly, and the inner core will be affected by the pressure and move upward until the pressure in the cavity is balanced with its own gravity and the repulsive force of the two magnets. At this time, the opening of the liquid outlet is increased accordingly, effectively ensuring the quality of pesticide application.

[0015] The beneficial effects of the present invention are as follows: The flow adaptive nozzle proposed by the present invention is used to replace the nozzle in the existing conventional plant protection machine nozzle. The nozzle itself is designed by changing the structural design of the nozzle. An active magnet is installed at the tail of the inner core, and then the nozzle is embedded in the adjustment seat as a whole. A conical sealing head is installed at the head of the inner core, and a fixed electromagnet is installed at the bottom of the adjustment seat. The repulsive force between the active magnet and the fixed electromagnet is used to adjust the gap between the conical seal and the liquid outlet hole, thereby adjusting the liquid output. Since the liquid outlet of the nozzle itself can be adjusted according to the pressure in the liquid cavity, and then combined with the adjustment of the control main line flow valve in the existing spraying system, the nozzle can solve the problems of the narrow adjustable flow range of the traditional nozzle, and the inability to atomize when the flow change exceeds the adaptability range of the nozzle, improve the quality of spraying operations, avoid the tedious operation of manually replacing the nozzle when adjusting the flow in a wide range, improve the adaptability of the flow control variable spraying system, reduce the cost of the variable spraying system, and improve the market application scope and prospects of the product.

[0016] The variable spraying system of the present invention can monitor the flow changes of each nozzle, change the coil current of the fixed electromagnet in real time to adjust the magnet repulsion force to ensure the consistency of the flow of each nozzle, and can also realize the rapid opening and closing of the nozzle by changing the direction of the coil current. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the flow rate adaptive nozzle of the variable spraying system of the plant protection machine of the present invention; Figure 2 It is a top view of the flow rate adaptive nozzle of the variable spraying system of the plant protection machine of the present invention; In the figure: 1, outer shell, 2, inner core, 3, fixed electromagnet, 4, movable magnet, 5, conical sealing head, 6, liquid cavity, 7, adjustment seat, 8, sealing gasket, 9, vent hole, 10, elastic sealing sleeve, 11, liquid inlet hole; 12, liquid outlet hole. DETAILED DESCRIPTION

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof; For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0020] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] As described in the background technology, the shortcomings of the prior art exist. In order to solve the above technical problems, this embodiment proposes a flow adaptive nozzle of a variable spraying system of a plant protection machine, an adjustment method, and a plant protection machine including the nozzle. In a typical embodiment of the present invention, Figure 1As shown, this embodiment discloses a flow adaptive nozzle of a variable spraying system of a plant protection machine, which is mainly composed of an outer shell 1, an inner core 2, a fixed electromagnet 3, an active magnet 4, a conical sealing head 5, an elastic sealing sleeve 10, an adjustment seat 7 and a sealing gasket 8. The device is used to replace the nozzle in the existing conventional plant protection machine nozzle, wherein the tail of the inner core 2 is equipped with an active magnet 4, which is embedded in the adjustment seat 7 as a whole, and the head of the inner core 2 is equipped with a conical sealing head 5, which clamps the upper end of the elastic sealing sleeve 10 onto the inner core 2, and the bottom end of the elastic sealing sleeve is installed on the upper end of the adjustment seat 7, and the inside of the adjustment seat 7 is equipped with a fixed electromagnet 3, and the active magnet 4 has the same polarity relative to the fixed electromagnet 3 to achieve the purpose of mutual repulsion, and the adjustment seat 7, together with the inner core 2 and the elastic sealing sleeve, is inserted into the outer shell 1 to replace the conventional nozzle as a whole, and is installed on the nozzle body by the nozzle cap; In this embodiment, the conical sealing head 5 and the inner core 2 are clamped together or screwed together through threads. A clamping groove is provided at the tail of the conical sealing head 5, and a protrusion for clamping is provided at the head of the inner core 2. The two are directly clamped together, or threads are provided on the outer ring of the protrusion and the inner ring of the clamping groove, and the conical sealing head 5 and the inner core 2 are clamped together through threads to achieve connection between the two.

[0022] In the present embodiment, the head of the conical sealing head 5 is conical. By designing the conical sealing head 5 into a cone, and then adjusting the position of the conical sealing head 5, the size of the gap between it and the liquid outlet 12 on the outer shell 1 can be adjusted. Specifically, when the conical sealing head 5 gradually moves from the inside of the outer shell 1 to the outside of the outer shell 1, the liquid outlet 12 of the outer shell 1 will become smaller and smaller. When the conical sealing head 5 gradually moves from the outside of the outer shell 1 to the inside of the outer shell 1, the liquid outlet 12 of the outer shell 1 will become larger and larger. In the present embodiment, the conical sealing head 5 is made of a rubber material with certain elastic function.

[0023] In this embodiment, the inner core 2 is a columnar structure, which includes three parts, the rear part is a hollow cylindrical structure, the middle part is a solid cylindrical structure, and the front part is a raised part; the outer ring of the rear half is provided with a spline protrusion, which cooperates with the spline groove on the adjustment seat 7, and the movable magnet 4 is fixed on the interface between the middle part and the rear part.

[0024] In this embodiment, the above-mentioned adjustment seat 7 is a T-shaped column structure, which is cylindrical as a whole, including a large-area end and a small-area end. The large-area end cooperates with the liquid inlet pipe end, and a cavity is formed along the small-area end toward the inside of the adjustment seat 7. The cavity is used to install the inner core 2. The rear part of the inner core 2 is located in the cavity, and the front part of the inner core 2 extends outside the cavity, and a fixed electromagnet 3 is arranged at the bottom of the cavity; the large-area end is provided with a liquid inlet hole 11, and the liquid inlet hole 11 is connected to the liquid medicine cavity 6 formed between the shell 1 and the adjustment seat 7, and the liquid inlet hole 11 is arranged in a circle around the circumferential direction of the adjustment seat 7, such as Figure 2 As shown, each liquid inlet hole 11 can be used to inlet liquid into the liquid medicine cavity 6 .

[0025] Furthermore, a vent hole 9 is provided on the side wall of the large-area end of the adjustment seat 7, one end of the vent hole 9 is connected to the outside, and the other end is connected to the cavity inside the adjustment seat 7, so that the inner core 2 can move freely in the cavity along the axial direction of the adjustment seat 7 and the inner core 2.

[0026] As a further technical solution, long through holes are evenly distributed on the bottom of the adjustment seat 7 to facilitate the flow of medicine into the cavity after the adjustment seat 7 is embedded in the shell 1. The side wall of the cavity inside the adjustment seat 7 is designed as an internal spline groove, which can reduce the friction between the inner core 2 and the adjustment seat 7 and improve the sliding property.

[0027] As a further technical solution, a fixed electromagnet 3 and a movable magnet 4 are respectively installed at the center position inside the adjustment seat 7 and the center position of the tail of the inner core 2. After the inner core 2 is embedded in the adjustment seat 7, the fixed electromagnet 3 and the movable magnet 4 are spaced a certain distance apart, and the fixed electromagnet 3 and the movable magnet 4 are in a mutually exclusive state so as to offset the pressure of the liquid medicine. At the same time, through the repulsive force formed between the fixed electromagnet 3 and the movable magnet 4, the conical sealing head 5 can move to the outside of the outer shell 1, thereby adjusting the size of the liquid outlet 12.

[0028] Furthermore, the elastic sealing sleeve 10 in this embodiment has a stepped cross-section, a front end face which is semi-closed and an open rear end, a through hole being provided on the front end face, a protrusion provided on the head of the inner core 2 passing through the through hole, and the end face being sleeved between the conical sealing head 5 and the inner core 2, and the remaining parts being sleeved on the front side of the inner core 2, the small area end of the adjustment seat 7 and the side wall in sequence; that is, it is installed on the front end of the inner core 2 through the conical sealing head, and after being inserted into the adjustment seat 7, it will form a liquid medicine cavity 6 with the adjustment seat 7, and the liquid medicine cannot enter. At the same time, there is a vent 9 in the adjustment seat 7 which communicates with the outside from the side wall, so that the inner core 2 can move freely in the cavity.

[0029] Furthermore, the exterior of the housing 1 is a nozzle cap, which, during installation, replaces the conventional nozzle as a whole and is installed on the nozzle body by the nozzle cap.

[0030] Furthermore, in this embodiment, the magnetic strength of the fixed electromagnet 3 can be adjusted, and the magnet repulsion force can be fine-tuned by changing the coil current on the fixed electromagnet 3, thereby improving the adaptability of the nozzle to different flow pressures.

[0031] Based on the above flow adaptive nozzle, the corresponding specific control method is as follows: The device replaces the conventional nozzle and is installed inside the spray head of the plant protection machine. It can automatically adjust the nozzle opening according to the main line liquid flow controlled by the variable spraying system, improve the nozzle flow adaptability and have the function of anti-drip of the one-way valve.

[0032] When the drug application system is not turned on, the drug liquid will flow into the drug liquid cavity 6 between the adjustment seat 7 and the outer shell 1 through the nozzle pipeline. Under no-pressure conditions, the inner core 2 will be affected by its own gravity and the repulsive force of the two magnets, causing the vertebral head of the inner core 2 to be pressed tightly against the liquid outlet 12 of the shell to form a sealed environment, and the drug liquid will not leak out of the nozzle.

[0033] When the plant protection machine starts to work, as the liquid pressure in the cavity increases, the inner core 2 will be pushed upward by the liquid pressure to open the lower liquid outlet 12 of the shell, and the liquid medicine will be sprayed out from the lower liquid outlet 12 in atomized form.

[0034] When the variable dosage system controls the main flow valve to adjust the flow rate to decrease, the pressure in the medicine liquid cavity 6 decreases accordingly, and the inner core 2 moves downward until the pressure in the cavity is balanced with its own gravity and the repulsive force between the two magnets. At this time, the opening of the liquid outlet 12 decreases accordingly, which can effectively ensure the atomization of the medicine liquid; conversely, when the flow valve adjusts the flow rate to increase, the pressure in the medicine liquid cavity 6 increases accordingly, and the inner core 2 moves upward under the influence of the pressure until the pressure in the medicine liquid cavity 6 is balanced with the gravity of the inner core and the repulsive force between the fixed electromagnet 3 and the movable magnet 4. At this time, the opening of the liquid outlet 12 increases accordingly, which can effectively ensure the quality of dosage.

[0035] This embodiment also provides a plant protection machine, the spraying system of the plant protection machine includes the flow adaptive nozzle of the variable spraying system of the plant protection machine described above. Since the plant protection machine is provided with the flow adaptive nozzle of the variable spraying system of the plant protection machine described above, the plant protection machine also has all the advantages described above. At the same time, the variable spraying system of the present invention can monitor the changes in the flow of each nozzle, change the coil current of the fixed electromagnet in real time to adjust the mutual repulsion of the magnet to ensure the consistency of the flow of each nozzle, and at the same time, the nozzle can be quickly opened and closed by changing the direction of the coil current.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flow adaptive nozzle, characterized in that: It includes an outer shell, an inner core, a fixed electromagnet, a movable magnet, a conical sealing head, an elastic sealing sleeve and an adjustment seat; the tail of the inner core is embedded in the adjustment seat, the head of the inner core is equipped with a conical sealing head, the tail of the inner core is equipped with a movable magnet, the interior of the adjustment seat is equipped with a fixed electromagnet, the relative polarity of the movable magnet and the fixed electromagnet is the same to achieve the purpose of mutual repulsion; the adjustment seat is installed in the outer shell, and a medicine liquid cavity is formed between the outer shell and the adjustment seat; a liquid outlet is provided on the shell, the liquid outlet is connected to the medicine liquid cavity, and the liquid outlet of the liquid outlet is controlled by the moving distance of the conical sealing head along its axial direction.

2. The flow adaptive nozzle according to claim 1, characterized in that: A cavity is formed inside the adjustment seat, the cavity cooperates with the tail of the inner core, and the front of the inner core extends out of the cavity; the fixed electromagnet is arranged at the bottom of the cavity.

3. The flow adaptive nozzle according to claim 2, characterized in that: A vent hole is arranged on the adjusting seat, and the vent hole is communicated with the cavity.

4. The flow adaptive nozzle according to claim 2, characterized in that: The adjusting seat is provided with a liquid inlet hole, and a liquid medicine cavity is formed between the liquid inlet hole, the shell and the adjusting seat and is in communication with each other.

5. The flow adaptive nozzle according to claim 1, characterized in that: The fixed electromagnet is arranged at the center of the adjustment seat, and the magnetic magnitude of the fixed electromagnet can be adjusted.

6. The flow adaptive nozzle according to claim 1, characterized in that: A movable magnet is arranged at the center of the tail of the inner core.

7. The flow adaptive nozzle according to claim 1, characterized in that: A sealing gasket is arranged between the shell and the adjustment seat.

8. The flow adaptive nozzle according to claim 1, characterized in that: The conical sealing head and the inner core are clamped together or screwed together through threads.

9. A plant protection machine, comprising a spraying system, characterized in that: The spraying system comprises the flow adaptive nozzle described in any one of claims 1-8.

10. The method for controlling a flow adaptive nozzle according to any one of claims 1 to 8, characterized in that: as follows: When the spraying system is not turned on, the liquid medicine will flow into the liquid medicine cavity between the adjustment seat and the shell through the nozzle pipeline. Under no pressure, the inner core will be subject to its own gravity and the repulsive force of the two magnets, causing the conical sealing head of the inner core to be pressed tightly against the liquid outlet of the shell to form a sealed environment to prevent the liquid medicine from leaking out. When the drug application system is gradually opened, as the liquid pressure in the drug liquid cavity increases, the inner core moves upward under the pressure of the drug liquid, and then moves upward with the conical sealing head to open the liquid outlet of the shell, and the drug liquid is sprayed out from the liquid outlet hole in atomized form; When the flow rate is reduced by adjusting the flow valve of the main flow line of the pesticide application system, the pressure in the medicine liquid cavity is reduced accordingly, and the inner core will move downward until the pressure in the cavity is balanced with its own gravity and the repulsive force of the two magnets. At this time, the opening of the liquid outlet is reduced accordingly to ensure the atomization of the medicine liquid; conversely, when the flow rate is increased by adjusting the flow valve, the pressure in the cavity is increased accordingly, and the inner core will be affected by the pressure and move upward until the pressure in the cavity is balanced with its own gravity and the repulsive force of the two magnets, and the opening of the liquid outlet is increased accordingly to ensure the quality of pesticide application.

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