Adaptive water and fertilizer supply device and adaptive water and fertilizer supply system

Abstract

The present invention addresses the shortcomings of the prior art in which hanging bags are used to supply liquid when replenishing water, nutrients or medicines for trees, and the frequent replacement of hanging bags results in a large workload and low efficiency for practitioners. The present invention provides an adaptive water and fertilizer supply device and a water and fertilizer supply system. The adaptive water and fertilizer supply device includes a shell for storing liquid and a liquid level control valve for controlling the liquid level in the shell. The liquid level control valve is located in the shell, and a shell liquid outlet is provided at the lower part of the shell for communication with an external pipeline. The liquid level control valve includes a valve body, a valve core, a support plate and a float limit device. The adaptive water and fertilizer supply system includes an infusion needle and an infusion pipeline connecting the infusion needle and the adaptive water and fertilizer supply device. The adaptive water and fertilizer supply device and the water and fertilizer supply system using the structure of the present invention greatly reduce the workload and inspection workload of practitioners in setting hanging bags, etc., improve labor efficiency, reduce labor costs, and will not cause environmental pollution.

Description

Technical Field

[0001] The invention belongs to the technical field of tree liquid replenishment devices, and in particular relates to a water and fertilizer supply device and a water and fertilizer supply system for replenishing water, liquid fertilizer or medicine to trees. Background Art

[0002] When using a needle to replenish water, nutrient solution or fertilizer to trees, the liquid needs to be placed in a hanging bag, which supplies the liquid to an infusion pump. The needle of the infusion pump is then inserted into the tree to deliver the liquid substance to the tree. When using this type of hanging bag to replenish liquid to trees, the hanging bag needs to be hung on the tree, and the liquid needs to be prepared in advance and poured into the hanging bag. Personnel need to conduct regular inspections to prevent the hanging bag from running out of liquid. When the hanging bag is empty, the hanging bag needs to be replaced, or when other types of liquids need to be replenished, the hanging bag also needs to be replaced. Trees are planted in large areas, some in the mountains, which results in a large workload and low work efficiency. The hanging bags are usually made of plastic and are generally disposable, resulting in a large amount of use and disposal of the hanging bags, causing environmental pollution. Summary of the Invention

[0003] The purpose of the present invention is to provide an adaptive water and fertilizer supply device and a water and fertilizer supply system to address the shortcomings of the existing technology in which liquid is supplied by hanging bags when replenishing water, nutrients or medicines for trees. The hanging bags need to be replaced frequently, resulting in a large workload and low efficiency for the practitioners.

[0004] The technical solution of the present invention to solve the technical problem is as follows:

[0005] 14. The liquid-conditioning liquid of claim 13, wherein the control valve is located in the liquid-conditioning liquid-conditioning liquid-supplying unit and the control valve body has the advantages of simple structure, convenient operation and high efficiency. When the valve body is opened, the valve core is disconnected from the valve body and the valve body is closed, and the valve body is closed when the valve core is closed.

[0006] The spool hole comprises an upper portion of the spool hole and a lower portion of the spool hole, the spool comprises a spool body, an elastic diaphragm and a compression spring, the spool body is divided into an upper portion of the spool body and a lower portion of the spool body, the outer peripheral wall of the upper portion of the spool body is tapered, the lower portion of the spool body is straight-cylindrical, the connection between the lower portion of the spool body and the upper portion of the spool body is provided with an annular flat shoulder, an annular groove is provided on the outer peripheral wall at the intersection of the upper portion of the spool body and the lower portion of the spool body, an annular wall is provided on the upper surface of the support plate, the valve body drain hole is located within the range surrounded by the annular wall, the mold has a central through hole and is sealed with the upper outer peripheral wall of the spool body through the central through hole in the annular groove, the diaphragm is fixed to the valve body through the annular wall, the upper portion of the spool body is located in the upper portion of the spool hole, the lower portion of the spool body is located in the lower portion of the spool hole, the diaphragm separates the upper portion of the spool hole and the lower portion of the spool hole into two parts that are not communicated with each other, and the water inlet channel and the water outlet channel are connected through the upper portion of the spool hole When the diaphragm is closed, the diaphragm is disengaged from the valve body and the valve core body is opened, and the diaphragm is opened, so that the diaphragm is opened, and the diaphragm is opened, and the diaphragm is opened, so that the diaphragm is opened, and the diaphragm is opened, and the diaphragm is opened, so that the diaphragm is opened, and the diaphragm is opened.

[0007] A convex edge convex outward is provided at the open end of the lower part of the valve core body, the diaphragm has a downward-opening cavity 1, a downward-opening cavity 2 is provided around the cavity 1, and a downward-opening cavity 3 is provided around the cavity 2. The diaphragm is connected to the outer wall of the lower part of the valve core body through the inner wall of the cavity 1, the convex edge supports the bottom of the cavity 2, the annular wall of the support plate is located in the cavity 3 and fixes the diaphragm in the lower opening groove provided on the valve body through the cavity 3, and there is a distance between the convex edge and the outer side of the annular wall;

[0008] The tail end of the compression spring is vertically arranged and passes through the diaphragm and the valve core body; or at least two mushroom-shaped connectors are provided on the flat shoulder of the valve core body, the diaphragm and the valve core body are fixedly connected through the mushroom-shaped connectors, the water inlet is provided in the mushroom-shaped connectors, and the tail end of the compression spring is vertically arranged and movably connected to the water inlet;

[0009] The housing is closed, and a housing air hole is provided on the upper part of the housing for communicating the inner cavity of the housing with the external atmosphere. The liquid inlet of the control valve is located outside the housing, and the housing is sealed and connected to the water inlet channel end of the valve body;

[0010] The first air hole of the shell is provided with a tubular air hole protective cover, which is fixedly connected to the shell at the intersection, and the second air hole of the shell is provided at the upper end of the air hole protective cover, and a protective cover is provided outside the second air hole of the shell to shield the second air hole of the shell.

[0011] An adaptive water and fertilizer supply system includes an infusion needle and an infusion pipe connecting the infusion needle and the adaptive water and fertilizer supply device. The adaptive water and fertilizer supply device is used, and the infusion pipe connects the liquid inlet end of the infusion needle and the liquid outlet of the housing of the adaptive water and fertilizer supply device.

[0012] The device comprises at least two infusion needles, each of which is connected to the self-adaptive water and fertilizer supply device through an infusion pipeline to absorb the liquid therein.

[0013] The advantages and beneficial effects of the present invention are:

[0014] The adaptive water and fertilizer supply device adopts the structure of the present invention. A liquid level control valve arranged in the shell controls whether the external high-pressure liquid enters the shell according to the water level in the shell, so that a certain amount of water is maintained in the shell. The excessive water in the shell is not caused to overflow, and a certain amount of water is always guaranteed to be stored in the shell to be provided to the trees. Liquid is automatically replenished according to the needs of the trees, and no manual supervision and inspection of the water level are required. The adaptive liquid supply is realized, thereby reducing the number of inspections and bag changes of employees, reducing labor intensity and improving labor efficiency.

[0015] The adaptive water and fertilizer supply system of the present invention can connect multiple infusion needles to supply liquid to a group of trees. There is no need to use hanging bags. Liquid can be automatically supplied to the sap needles, which greatly reduces the workload of practitioners in setting up hanging bags and patrolling, improves labor efficiency, reduces labor costs, and does not cause environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the adaptive water and fertilizer supply device of the present invention;

[0017] Figure 2 for Figure 1 DD cross-sectional structure diagram;

[0018] Figure 3 for Figure 1 Schematic top view of ;

[0019] Figure 4This is a schematic structural diagram of an embodiment of a liquid level control valve of the present invention;

[0020] Figure 5 yes Figure 4 AA cross-sectional structural diagram;

[0021] Figure 6 yes Figure 4 Schematic diagram after rotating 90 degrees;

[0022] Figure 7 yes Figure 6 BB cross-sectional structure diagram;

[0023] Figure 8 yes Figure 7 Schematic diagram of the structure of the embodiment of the core body with the water inlet and outlet channels opened, where FF is the line indicating the direction of no flow;

[0024] Figure 9 This is a schematic diagram of the front view of the structure of the float limit plate embodiment;

[0025] Figure 10 for Figure 9 CC cross-sectional view;

[0026] Figure 11 for Figure 9 Schematic top view of .

[0027] Description of Reference Numerals

[0028] 200 - Liquid level control valve 220 - Valve body 221 - Filter screen 222 - Control valve liquid inlet 223 - Control valve liquid outlet 224 - Water inlet channel 225 - Water outlet channel 226 - Wall 227 - Valve core hole 2271 - Upper part of valve core hole 2272 - Lower part of valve core hole 228 - Cover top inlay groove

[0029] 240 - Valve core 241 - Valve core body 2411 - Upper part of valve core body 2412 - Lower part of valve core body 2413 - Annular groove 2414 - Raised edge 242 - Diaphragm 2421 - Cover top 2422 - Cover wall 2423 - Chamber 1 2424 - Chamber 2 2425 - Chamber 3 2426 - Cover top edge 2427 - Mushroom-shaped connector 243 - Spring 260 - Support plate 261 - Valve body drain hole 262 - Support plate connecting hole 263 - Annular wall 264 - Connecting plate 270 - Float limit device 271 - Float limit plate 272 - Blocking 273 - Limit plate connecting shaft 274 - Limit short plate 1 275 - Limit short plate 2 276 - Connecting hole 277 - Float

[0030] 300-housing 301-air hole protective cover 302-housing air hole 1 303-housing liquid outlet 304-protective cover 305-housing air hole 2 DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely illustrative and non-restrictive, and should not be used to limit the scope of protection of the present invention. For ease of description, the positional relationship between the various components of the system will be described based on their normal use positions.

[0032] In the present invention, liquid fertilizer is a general term for water, liquid fertilizer, and liquid medicine, and can refer to one liquid or two or more liquids.

[0033] like Figure 1-Figure 5 As shown, the adaptive water and fertilizer supply system according to an embodiment of the present invention includes a water and fertilizer supply device, an infusion needle for directly delivering liquid to trees, and an infusion pipeline. The liquid inlet of the infusion needle is connected to the liquid outlet of the water and fertilizer supply device via the infusion pipeline. In the present invention, a single water and fertilizer supply device can deliver liquid to multiple water and fertilizer infusion needles.

[0034] The water and fertilizer supply device of the present invention includes a shell 300 as a liquid storage tank and a liquid level control valve 200 for controlling the liquid level in the shell. The liquid level control valve is located in the shell. Figure 2As shown, a housing pore 1 302 is provided at the upper part of the housing, preferably at the top position. In order to prevent mosquitoes, dust, etc. from entering the housing, the housing pore 1 is provided as a plurality of small pores. A pore protective sleeve 301 is provided on the outside of the housing pore 1. The pore protective sleeve is tubular and intersecting with the housing. A housing pore is also provided on the outer wall of the pore protective sleeve, referred to as housing pore 2 305. A protective sleeve cover 304 is provided at the top position of the pore protective sleeve. The protective sleeve cover has a cover top, which is used to close the top opening of the pore protective sleeve, and also includes a cover wall. The height of the cover wall can cover the housing pore 2 on the pore protective sleeve. In this way, the inner cavity of the housing can be connected to the outside atmosphere, and mosquitoes, dust, impurities, etc. can be effectively prevented from entering the housing, so that the liquid in the housing is kept clean and the clogging of the liquid outlet and the needle hole of the infusion needle is prevented. The shell pores of the present invention adopt a double-layer pore structure. When the shell pore 2 located on the pore protection sleeve is damaged or corroded, the second layer of pores located on the shell body, that is, the shell pore 2, can still perform its function, thereby extending the service life of the shell. The lower part of the shell is preferably provided with a shell liquid outlet 303 at the bottom of the shell for connection with the infusion pipeline. The upper part of the shell is preferably provided with an opening at the top for the pipeline to enter and exit. In the present invention, the shell has two main functions. One is to store liquid and provide liquid to the infusion needle. The other main function is to protect the liquid level control valve located therein. It can prevent external physical impact, dust, etc. from damaging or corroding the internal components, thereby extending the service life of the entire device and providing a stable working environment.

[0035] like Figure 4-Figure 7As shown, the liquid level control valve 200 includes a valve body 220, a valve core 240, a support plate 260, and a float stopper 270. An inlet channel 224 and an outlet channel 225 are provided within the valve body. The valve core 240 seals the connection between the inlet channel 224 and the outlet channel 225 on the valve body 220. The float stopper 270 senses the level of liquid in the housing, thereby changing the position between the valve core and the valve body to open or close the inlet channel on the valve body. In this technical solution, a control valve liquid inlet 222 is provided at the upper end of the valve body. The inlet channel 224 is located at the lower portion of the valve body and communicates with the control valve liquid inlet 222. The outlet channel 225 is provided at the lower portion of the valve body. The outlet channel is provided with a control valve liquid outlet 223 that communicates with the inner cavity of the housing. Preferably, a valve core hole 227 is also provided at the lower portion of the valve body to accommodate the valve core, and the inlet and outlet channels are connected through the valve core hole. The valve core hole preferably includes an upper portion 2271 and a lower portion 2272. The upper portion communicates with the water outlet channel 225. The water inlet and outlet channels are connected through the valve core hole. The valve core includes a valve core body 241, a diaphragm 242, and a spring 243. The valve core body includes an upper portion 2411 and a lower portion 2412. The upper portion 2411 has a conical outer wall with an annular groove 2413 circumferentially disposed along its outer wall. The lower portion 2412 is a straight cylinder with an outwardly protruding lip 2414 disposed at its lower end. The upper portion of the valve core body is located within the upper portion of the valve core hole and is sealed and connected to the upper portion. The lower portion of the valve core body is located within the lower portion of the valve core hole. A gap is formed between the lip 2414 of the lower portion of the valve core body and the inner wall of the lower portion of the valve core hole. The diaphragm separates the upper and lower portions of the valve core hole into two mutually disconnected parts. Preferably, at least two mushroom-shaped connectors 2427 are provided at the top of the lower portion of the valve core body. The diaphragm is provided with mating holes, which the diaphragm is fitted onto the handles of the mushroom-shaped connectors through the mating holes, securing the diaphragm to the valve core body and thus integrally connecting the two. Water inlet holes (not shown) are provided at the top of the lower portion of the valve core body and on the diaphragm, respectively, opposite the water inlet channel. The top of the lower portion of the valve core body and the water inlet holes of the diaphragm are interconnected, preferably positioned directly opposite each other. The water inlet channel is connected to the inner cavity below the valve core hole through the valve body drain hole. The support plate 260 includes a plate body, with an annular wall 263 provided on one side of the plate body. A valve body drain hole 261 is provided within the annular wall of the support plate, connecting the valve body drain hole 261 to both sides of the plate body. A connecting structure is provided on the side of the support plate opposite the annular wall. The connecting structure comprises two opposing connecting plates, positioned near the edge of the support plate. A connecting hole is provided on the support plate outside the annular wall for securing the support plate. The annular wall is arranged in the valve core hole, and the support plate closes the lower end opening of the valve core hole and is fixedly connected to the valve body through the connecting hole and bolts. Figure 5 and Figure 7As shown, the diaphragm 242 is a special-shaped component, which is in the shape of a cover as a whole, including a cover top 2421 and an annular cover wall 2422 arranged on one side of the cover top. The cover top is concave along its edge so that the diaphragm constitutes a structure with three cavities. Cavity 1 2423 is a central cavity, and the inner surface of its side wall is adapted to the shape and size of the outer wall of the lower part of the valve core body. The diaphragm is connected to the lower part of the valve core body through the side wall of the central cavity. Cavity 2 2424 is an annular groove formed by the concave top of the cover, and cavity 2 and cavity 3 are supported by the convex edge. 2425 is a downward-opening annular groove formed at the edge of the top of the cover after the top of the cover is recessed. The recessed top of the cover is called the top edge 2426. The annular wall 263 of the support plate is inserted into the cavity 3 2425 through its top, and is connected to the cavity 3 in an insert-type manner. The side wall of the valve body is provided with a top mounting groove 228 for accommodating the top edge. The top mounting groove is an annular groove with a downward opening. The top edge 2426 of the diaphragm is set in the top mounting groove of the valve body and is inserted and fixed by the annular wall of the support plate. The valve core diaphragm and the valve core are provided with a center hole at the top of the top of the cover. The center hole is inserted into the annular groove 2413 provided on the outer wall of the valve core through the center hole and sealed. The spring 243 is located in the lower portion 2272 of the valve core hole. The spring 243 is located between the support plate and the valve core, and is in contact or fixed connection with both. Preferably, the tail end of the spring is vertically positioned and extends through the valve core body and the diaphragm, thereby guiding the valve core body and the diaphragm when the valve core body descends. Preferably, the tail end of the spring extends through the water inlet hole, and preferably, a through hole is provided in one of the mushroom-shaped connectors as the water inlet hole, with the tail end of the spring disposed in this water inlet hole.

[0036] like Figure 2 、 Figure 5 、 Figure 6 and Figure 7As shown, in this technical solution, the preferred float stop device 270 includes a float stop plate 271 and a float 277. The end of the float stop plate near the valve body drain hole 261 is rotatably connected to the connecting plate 241 provided below the support plate via a stop plate connecting shaft 273. The float stop plate is located directly below the valve body drain hole. A plug 272 is provided at the position of the float stop plate corresponding to the valve body drain hole. A float is hingedly provided at the end of the float stop plate away from the stop plate connecting shaft. When the float rises, it drives the float stop plate to rotate around the stop plate connecting shaft. When it rises to a certain height, the plug seals the valve body drain hole, thereby forming a water storage chamber with the diaphragm, the lower part of the valve core hole, and the support plate. A short limit plate is provided at each end of the float limit plate, each at a 60-90 degree angle relative to the float limit plate. The short limit plate near the limit plate connecting shaft is called short limit plate 1, which bends toward the valve core body. The short limit plate away from the limit plate connecting shaft is called short limit plate 2, which bends toward the float. Short limit plate 1 is connected to the circumferential outer wall of the support plate, while short limit plate 2 is connected to the circumferential outer wall of the float, limiting the rotation angle of the float relative to the float limit plate and preventing the float from tilting at a large angle and losing its function of controlling the water level. The connection between the float limit plate and the support plate is close to the plug, which is located between the connection between the float limit plate and the support plate and the connection with the float. The float limit plate forms a lever structure. When the float limit plate reaches a horizontal position, the plug completely closes the valve body drain hole. When the inclination of the float limit plate reaches a predetermined angle, the plug disengages from the valve body drain hole, and the valve body drain hole is fully opened.

[0037] It is preferred to install a filter screen 221 at the control valve's liquid inlet to filter water entering the valve body. The upper end of the control valve body extends beyond the opening for pipe access provided at the top of the housing and is sealed to the housing opening. This allows the control valve's liquid inlet to be located outside the housing, facilitating connection to the pipe. Alternatively, the control valve's liquid inlet opening may be flush with the housing's top or located within the housing. The drainage rate of the valve body's drain hole is greater than the water inlet rate of the water inlet holes provided on the diaphragm and valve core.

[0038] The working principle of the present invention is as follows: when the liquid level control valve is open, high-pressure liquids such as water and fertilizer enter the valve body after being filtered through the filter installed at the liquid inlet of the control valve, and enter the outer shell through the water inlet channel, the water outlet channel and the liquid outlet of the control valve. As the liquid level in the outer shell rises, the end of the float limit plate connected to the float is pushed up by the float and gradually rises. After rising to a certain height, it blocks the drain hole of the valve body, cutting off the connection between the water storage chamber and the outer shell. Since the water storage chamber is connected to the water inlet channel through the water inlet hole set on the diaphragm and the valve core, the water in the water storage chamber is full. Therefore, the water pressure on the upper and lower sides of the diaphragm is equal. Under the action of the spring, the diaphragm and the valve core move upward, closing the water inlet channel and the water outlet channel, and no longer supplying liquid to the outer shell. That is, the liquid in the outer shell reaches the highest level. At this time, since the water inlet channel and the water outlet channel in the valve body are closed by the valve core, the water in the water inlet channel becomes high-pressure water under the action of the inlet pressure. As the trees absorb liquids such as water, fertilizer, etc., the liquid level in the outer shell drops, and the float drops with the drop in liquid level, driving the end of the float limit plate connected to the float to also drop downward. When the float limit plate drops to a certain height, the seal on the float limit plate separates from the valve body drain hole on the support plate, the valve body drain hole is opened, and the water storage chamber formed by the valve core and the support plate is connected to the inner cavity of the outer shell, thereby draining water into the outer shell. Since the drainage speed of the valve body drain hole is greater than the water inlet speed of the water inlet hole, the water level in the water storage chamber drops and loses the pressure on the diaphragm. Since the pressure of the high-pressure liquid is greater than the tension of the spring, the diaphragm is pressed down and deformed under the action of the high-pressure liquid pressure. Since the diaphragm is elastic, the diaphragm drives the valve core to drop. At the same time, the spring is compressed and the valve core moves downward, the liquid inlet channel and the liquid outlet channel are opened, and the channel for supplying water and fertilizer to the outer shell is opened. As the liquid enters the housing, the liquid level inside the housing rises, and the float pushes the lower end of the float limit plate, which is also the end connected to the float, to rise. When the liquid level reaches a certain height, the seal on the float limit plate blocks the valve body drain hole again, and the water storage cavity is re-formed. The liquid enters the water storage cavity from the water inlet hole set on the diaphragm and the valve core, causing the water level in the water storage cavity to rise. At the same time, the pressure of the water in the water storage cavity and the pressure of the water above the diaphragm are equal to high pressure. Under the action of the tension of the compression spring, the valve core returns to its position, blocking the water inlet and outlet channels, and closing the supply of water and fertilizer. In the technical solution of this patent, due to the action of the float, the liquid level is always below the float limit plate, and the valve body drain hole is always in a gas environment and will not be submerged in liquid. As the liquid in the shell is used, the liquid level in the shell drops, and the height of the float drops, driving the end of the float limit plate connected to the float to drop synchronously. When it drops to a certain height, the blockage separates from the drain hole of the valve body, and the water storage chamber is connected to the inner cavity of the shell, causing the water level in the water storage chamber to drop and lose the pressure on the diaphragm, and the next water supply to the shell begins.The purpose of providing the first and second stopper plates is to prevent the float from significantly changing its position and posture as the water level drops, potentially causing the float stopper to lose its limiting function and control of the water level, leading to the housing filling with liquid and thus losing its ability to regulate the water level. Because the float and the stopper plate are hingedly connected, when the float descends, it swings along the hinge axis under the buoyancy of the liquid, causing the float's position to become uncertain. With the first and second stopper plates, the second stopper plate limits the float's position, while the first stopper plate limits the inclination angle of the stopper plate, thereby preventing the float from significantly tilting and maintaining the stopper's position. This structure maintains the float's position in a stable position thanks to the mutual positional constraints between the stopper plates at each end of the stopper plate, the support plate, and the float. The result is a simple structure, reliable operation, and resistance to damage.

[0039] The float's buoyancy controls the liquid level in the water and fertilizer supply system based on changes in the liquid level. When the liquid level drops, the float sinks, releasing the float stop plate and enabling water and fertilizer supply. When the liquid level rises, the float rises, triggering the float stop plate to block the valve drain hole and halt water and fertilizer supply. The rise and fall of the float allows for precise control of the liquid level, ensuring the liquid level in the supply system remains stable within the set range.

[0040] During use, the liquid outlet of the housing is connected to an infusion needle via a connecting pipe. Multiple infusion needles can be connected via the connecting pipe. The infusion needles are then inserted into a tree, and nutrient solution, medicine, or pure water is added to the housing according to the tree's needs for absorption. Because the water and fertilizer supply device of the present invention automatically replenishes liquid through the control of a liquid level control valve, it can be used with multiple infusion needles. Simply mixing the required medicine or fertilizer into the high-pressure liquid is sufficient. Compared to infusion bags in the prior art, frequent replacement of infusion bags is unnecessary because the liquid supply is long-term. Therefore, the device can replace watering, significantly reducing the workload of practitioners and improving labor efficiency. It is particularly suitable for irrigation and fertilization in arid and rainless areas.

Claims

1. An adaptive water and fertilizer supply device, characterized in that: The invention comprises a shell for storing liquid and a liquid level control valve for controlling the liquid level in the shell, the liquid level control valve is located in the shell, and a shell liquid outlet is provided at the lower part of the shell for communication with an external pipeline, the liquid level control valve comprises a valve body, a valve core, a support plate and a float limit device, a water inlet channel and a water outlet channel are provided in the valve body, the water inlet channel is communicated with the liquid inlet of the control valve, the water outlet channel is communicated with the liquid outlet of the control valve, the liquid inlet of the control valve is communicated with the external high-pressure water inlet pipe, the liquid outlet of the control valve is communicated with the inner cavity of the shell to supply water to the inner cavity of the shell, the valve core is located in the valve body to switch the water inlet channel and the water outlet channel between communication and disconnection, and the support plate is used to close the valve core hole of the valve body The valve body drain hole is connected to the inner cavity of the shell by a valve body limit plate provided on the support plate, and the float limit device includes a float limit plate and a float, the float is hingedly connected to the bottom of one end of the float limit plate, and the other end of the float limit plate is hingedly connected to the support plate. A seal is provided between the hinged position of the float limit plate, the support plate and the float, and the hinged position of the float limit plate and the support plate. When the float pushes the float limit plate to reach the highest design liquid level, the seal closes the valve body drain hole. When the float drives the float limit plate to reach the lowest liquid level, the seal is separated from the valve body drain hole. A limit short plate is bent upward at one end of the float limit plate on the same side as the hinged position of the support plate. The closure of the valve body is opened when the closure is closed, and the closure is opened when the closure is closed. When the closure is closed, the closure is opened when the closure is closed, and the closure is opened when the closure is closed. When the closure is closed, the closure is opened when the closure is closed, and the closure is opened when the closure is closed. When the closure is closed, the closure is opened when the closure is closed, and the closure is opened when the closure is closed. When the closure is closed, the closure is opened when the closure is closed, and the closure is opened when the closure is closed. When the closure is closed, the closure is opened when the closure is closed, and the closure is opened when the closure is closed. The inner wall of cavity one is sleevedly connected to the outer wall of the lower part of the valve core body, the convex edge supports the bottom of cavity two, the annular wall of the support plate is located in cavity three and the diaphragm is fixed in the lower opening groove set on the valve body through cavity three. There is a distance between the convex edge and the outer side of the annular wall. The outer shell is closed, and an outer shell air hole one is provided on the upper part of the outer shell for communication between the inner cavity of the outer shell and the external atmosphere. The liquid inlet of the control valve is located outside the outer shell, and the outer shell is sealed to the water inlet channel end of the valve body. A tubular air hole protective cover is provided at one of the outer shell air holes, and the air hole protective cover is fixedly connected to the outer shell at intersection. An outer shell air hole two is provided at the upper end of the air hole protective cover, and a protective cover is provided outside the outer shell air hole two to shield the outer shell air hole two by the protective cover.

2. The adaptive water and fertilizer supply device according to claim 1, characterized in that: The valve core body is divided into the upper part of the valve core body and the lower part of the valve core body. The outer peripheral wall of the upper part of the valve core body is tapered, and the lower part of the valve core body is straight cylindrical. The intersection between the lower part of the valve core body and the upper part of the valve core body is provided with an annular flat shoulder, and an annular groove is provided on the outer peripheral wall at the intersection of the upper part of the valve core body and the lower part of the valve core body. An annular wall is provided on the upper surface of the support plate, and the valve body drain hole is located within the range surrounded by the annular wall. The diaphragm has a central through hole and is sealed with the upper outer peripheral wall of the valve core body through the central through hole. The diaphragm is fixed to the valve body through the annular wall. The upper part of the valve core body is located in the upper part of the valve core hole, and the lower part of the valve core body is located in the lower part of the valve core hole. The diaphragm isolates the upper part of the valve core hole and the lower part of the valve core hole into two parts that are not connected to each other. The water inlet channel and the water outlet channel are connected through the upper part of the valve core hole, and water inlet and outlet channels are provided at relative positions on the diaphragm and the valve core body. When the valve body is drained, the diaphragm is opened, and the diaphragm is expanded downwardly under the action of the high-pressure water, pushing the valve core body downwardly so as to separate the upper portion of the valve core body from the upper portion of the valve core hole, thereby supplying water to the outer shell.

3. The adaptive water and fertilizer supply device according to claim 2, characterized in that: The tail end of the compression spring is vertically arranged and passes through the diaphragm and the valve core body; or at least two mushroom-shaped connecting heads are provided at the flat shoulder of the valve core body, the diaphragm and the valve core body are fixedly connected through the mushroom-shaped connecting heads, the water inlet hole is arranged in the mushroom-shaped connecting heads, and the tail end of the compression spring is vertically arranged and movably connected to the water inlet hole.

4. An adaptive water and fertilizer supply system, comprising an infusion needle and an infusion pipe connecting the infusion needle and the adaptive water and fertilizer supply device, characterized in that: The adaptive water and fertilizer supply device according to any one of claims 1 to 3 is used, wherein the infusion pipe connects the liquid inlet end of the infusion needle and the liquid outlet of the housing of the adaptive water and fertilizer supply device.

5. The adaptive water and fertilizer supply system according to claim 4, characterized in that: The device comprises at least two infusion needles, each of which is connected to the self-adaptive water and fertilizer supply device through an infusion pipeline to absorb the liquid therein.

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