Water flow automatic switching valve

Abstract

This invention relates to an automatic water flow switching valve, comprising a valve body. The valve body internally includes a water inlet channel, a drip irrigation outlet channel, a micro-sprinkler irrigation outlet channel, and an internal cavity. The water inlet channel, drip irrigation outlet channel, and micro-sprinkler irrigation outlet channel are connected through the internal cavity. A drip irrigation valve core is installed in the drip irrigation outlet channel, which closes as the inlet water pressure increases. A micro-sprinkler irrigation valve core is installed in the micro-sprinkler irrigation outlet channel, which opens as the inlet water pressure increases. When the drip irrigation valve core is open, the micro-sprinkler irrigation valve core is closed; when the drip irrigation valve core is closed, the micro-sprinkler irrigation valve core is open. This invention's valve effectively achieves free switching between micro-sprinkler irrigation and drip irrigation by simply adjusting the water pressure. The valve has a simple structure, is easy to maintain, and is low in cost. It can be well applied to efficient water-saving irrigation and precise fertilization and spraying of economic crops and horticultural crops such as fruit trees, vegetables, flowers, and seedlings.

Description

Technical Field

[0001] This invention relates to an automatic water flow switching valve, belonging to the field of valves. Background Technology

[0002] There are many types of valves on the market, such as butterfly valves, ball valves, and stop valves. These valves have different characteristics, but they all have one thing in common: they all control the direction of water flow in one direction, that is, the direction of water flow is fixed, the outlet is single, and the valve opening and closing need to be manually adjusted. They cannot effectively realize the automatic change of water flow direction according to the change of water supply pressure. Drip irrigation is an advanced water-saving irrigation technology. It involves delivering pressurized irrigation water through distribution pipes to the final stage of the facility and the drippers installed on them, allowing water to drip evenly and accurately onto the soil surface near the crop root zone or into the soil layer containing the crop roots. It is a localized irrigation method that can precisely irrigate and fertilize the crop roots. The water supply pressure required for drip irrigation is 0.1 MPa. Micro-sprinkler irrigation is another advanced water-saving irrigation technology. It also uses distribution pipes to deliver pressurized water to the final stage of the facility and the micro-sprinklers installed on them, spraying pressurized water evenly and accurately onto the branches and leaves of each plant or the soil surface around the plant roots. The water supply pressure required for micro-sprinkler irrigation is 0.2-0.3 MPa. It can be used for irrigation, fertilization, and foliar spraying of cash crops such as fruit trees, fruit trees, and vegetables, and can also regulate the field microclimate and reduce the occurrence of pests and diseases.

[0003] To maximize yield and efficiency by implementing efficient water, fertilizer, and pesticide application, and by ensuring precise irrigation, fertilization, and pesticide application for different crops, different irrigation, fertilization, and pesticide application methods should be implemented based on crop characteristics. This necessitates the configuration of water-saving irrigation systems that combine drip irrigation and micro-sprinkler irrigation. However, since drip irrigation and micro-sprinkler irrigation systems operate at significantly different pressures, implementing both methods simultaneously for the same crop would require two separate irrigation systems. This wastes land and increases initial equipment investment, failing to meet the requirements of energy conservation and modernization. Furthermore, relying solely on a single irrigation system will not allow any single system to simultaneously meet the demands of efficient irrigation, precise fertilization, and foliar spraying.

[0004] The three essential elements of an irrigation system are the water source, the pump and its supporting power equipment, and the piping system and accessories. Different irrigation methods require different piping systems and accessories, but the water source, pump, and supporting power equipment can simultaneously support two different irrigation methods. Valves, as an indispensable component of the irrigation system, play a crucial role in controlling the direction, flow, and isolation of water, maintaining the stable operation of the system. Therefore, under the premise of sharing a single irrigation system's water source, pump, and supporting power equipment, developing a valve that automatically reverses the water flow based on the inlet pressure, and connecting it to the diversion control pipelines of drip irrigation and micro-sprinkler irrigation systems, will enable the switching and normal operation of these two different irrigation technologies. This will have significant research value and practical application value in significantly reducing the number of supporting equipment, overall investment, and improving irrigation water use efficiency. Summary of the Invention

[0005] The purpose of this invention is to design a valve that can automatically switch the direction of the water flow channel according to pressure sensing, so that drip irrigation systems and micro-sprinkler irrigation systems can flexibly open and close their working states and switch between each other, solving the current technical problem that fruit trees, fruit trees and vegetables and other cash crops cannot be irrigated, fertilized and sprayed in a reasonable and convenient way.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] An automatic water flow switching valve includes a valve body. The valve body has an inlet channel, a drip irrigation outlet channel, a micro-sprinkler irrigation outlet channel, and an internal cavity. The inlet channel, the drip irrigation outlet channel, and the micro-sprinkler irrigation outlet channel are connected through the internal cavity. The drip irrigation outlet channel is equipped with a drip irrigation valve core that closes as the inlet water pressure increases. The micro-sprinkler irrigation outlet channel is equipped with a micro-sprinkler irrigation valve core that opens as the inlet water pressure increases. When the drip irrigation valve core is open, the micro-sprinkler irrigation valve core is closed; when the drip irrigation valve core is closed, the micro-sprinkler irrigation valve core is open.

[0008] Preferably, the drip irrigation valve core includes an external drip irrigation coupling, an elastic diaphragm, and a water guide column. The drip irrigation water outlet channel includes a drip irrigation inlet chamber and a drip irrigation outlet chamber. The water guide column is disposed in the drip irrigation inlet chamber, and the elastic diaphragm is disposed in the drip irrigation outlet chamber. One end of the external drip irrigation coupling is connected to the drip irrigation outlet channel, and the other end of the external drip irrigation coupling is connected to the drip irrigation outlet pipe. The water guide column and the elastic diaphragm are fixed together. The diameter of the water guide column is smaller than the diameter of the water inlet pipe. The diameter of the elastic diaphragm is greater than or equal to the diameter of the water guide column and smaller than the diameter of the drip irrigation outlet chamber. The thickness of the elastic diaphragm is less than the length of the drip irrigation outlet chamber.

[0009] Preferably, the water guide column is made of a material with a density not greater than that of water.

[0010] Preferably, the micro-sprinkler valve core includes a micro-sprinkler outer pipe clamp, a piston, a sprinkler spring, and a sprinkler fixing plate. The sprinkler fixing plate is provided with sprinkler water permeable holes. The micro-sprinkler water outlet channel includes a micro-sprinkler water inlet chamber and a micro-sprinkler water outlet chamber. One end of the micro-sprinkler outer pipe clamp is connected to the micro-sprinkler water outlet channel, and the other end of the micro-sprinkler outer pipe clamp is connected to the micro-sprinkler water outlet pipe. One end of the sprinkler spring is fixed to the piston, and the other end of the sprinkler spring is fixed to the sprinkler fixing plate. The diameter of the piston is the same as the diameter of the micro-sprinkler water inlet chamber. When the micro-sprinkler valve core is closed, the piston is located in the micro-sprinkler water inlet chamber. The sprinkler fixing plate is disposed in the micro-sprinkler water outlet chamber. The diameter of the sprinkler fixing plate is less than or equal to the diameter of the micro-sprinkler water outlet chamber, and the diameter of the sprinkler fixing plate is greater than the diameter of the micro-sprinkler water outlet pipe.

[0011] Preferably, the micro-sprinkler valve core further includes a water-isolating ring, and the sprinkler spring is disposed inside the water-isolating ring.

[0012] Preferably, the drip irrigation valve core includes a drip irrigation outer pipe clamp, a sealing plate, a sealing ring, a drip irrigation spring, a drip irrigation fixing plate, and a drip irrigation permeable hole. The drip irrigation water outlet channel includes a drip irrigation inlet chamber and a drip irrigation outlet chamber. One end of the drip irrigation outer pipe clamp is connected to the drip irrigation outlet channel, and the other end of the drip irrigation outer pipe clamp is connected to the drip irrigation outlet pipe. One end of the drip irrigation spring is fixed to the sealing plate, and the other end of the drip irrigation spring is fixed to the drip irrigation fixing plate. The sealing ring is fixed to the sealing plate. The diameter of the sealing plate is not less than the diameter of the drip irrigation inlet chamber. The drip irrigation fixing plate is disposed in the drip irrigation outlet chamber, and the diameter of the drip irrigation fixing plate is less than or equal to the diameter of the drip irrigation outlet chamber. The diameter of the drip irrigation fixing plate is greater than the diameter of the micro-sprinkler irrigation outlet pipe. The drip irrigation permeable hole is disposed at the center of the drip irrigation fixing plate, and the diameter of the drip irrigation permeable hole is less than the diameter of the sealing plate.

[0013] Preferably, the valve body has a smooth, rounded metal shell.

[0014] The beneficial effects of this invention are:

[0015] This invention utilizes a valve that changes the direction of the water flow channel according to pressure variations, enabling simultaneous control of two different irrigation systems within a single irrigation hub, thus automating the switching between irrigation modes. The dual-channel design of the automatic valve connects both drip irrigation and micro-sprinkler irrigation lines, reusing the water source hub and pump components of the irrigation system. This improves land utilization within greenhouses and increases the efficiency of irrigation water use. When the water pressure is low, the drip irrigation valve opens; as the pressure rises to a certain level, the drip irrigation valve closes, while the micro-sprinkler irrigation valve opens. Through an elastic diaphragm and sprinkler spring, bidirectional valve control is achieved. The process is simple, inexpensive, and easy to operate.

[0016] This invention not only satisfies the irrigation needs of intercropping two crops with different water requirements, but also solves the current problem of the lack of reasonable and convenient irrigation and pesticide application technologies for fruit trees, promoting increased crop yields and providing comprehensive, three-dimensional protection for the planted crops. Simultaneously, it improves land use efficiency to a certain extent, saves irrigation water resources, reduces investment in drip irrigation system construction, and can automatically adjust the outflow direction of water in the valve according to changes in pipeline pressure, eliminating the tediousness of manual operation. This promotes the energy-saving, professional, modern, precise, and diversified development of facility agriculture in my country. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the valve structure of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of part A;

[0020] Figure 3 This is a schematic diagram of another structure of the valve of the present invention;

[0021] In the diagram, 1 is the sprinkler fixing plate, 2 is the sprinkler water inlet, 3 is the sprinkler spring, 4 is the water-sealing ring, 5 is the piston, 6 is the internal cavity, 7 is the valve body, 8 is the metal shell, 9 is the water inlet channel, 10 is the micro-sprinkler external pipe clamp, 11 is the micro-sprinkler water outlet cavity, 12 is the micro-sprinkler water inlet cavity, 13 is the drip irrigation water inlet cavity, 14 is the drip irrigation water outlet cavity, 15 is the drip irrigation external pipe clamp, 16 is the elastic diaphragm, 17 is the water guide column, 18 is the sealing plate, 19 is the sealing ring, 20 is the drip irrigation spring, 21 is the drip irrigation fixing plate, and 22 is the drip irrigation water inlet. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1 and 2 As shown, an automatic water flow switching valve includes a valve body 7. The structure of the valve body 7 has a significant impact on the valve's lifespan. This invention provides a smooth-arc metal outer shell 8 on the outside of the valve body 7, which ensures the stability of the internal structure, improves the service life of the valve, and increases the reliability of the irrigation system.

[0025] The valve body 7 is internally provided with a water inlet channel 9, a drip irrigation water outlet channel, a micro-sprinkler irrigation water outlet channel, and an internal cavity 6. The water inlet channel 9, the drip irrigation water outlet channel, and the micro-sprinkler irrigation water outlet channel are connected through the internal cavity 6. The drip irrigation water outlet channel is provided with a drip irrigation valve core that closes as the inlet water pressure increases. The micro-sprinkler irrigation water outlet channel is provided with a micro-sprinkler irrigation valve core that opens as the inlet water pressure increases. When the drip irrigation valve core is open, the micro-sprinkler irrigation valve core is closed, and when the drip irrigation valve core is closed, the micro-sprinkler irrigation valve core is open.

[0026] The drip irrigation valve core includes an external drip irrigation coupling 15, an elastic diaphragm 16, and a water guide column 17. The drip irrigation water outlet channel includes a drip irrigation inlet chamber 13 and a drip irrigation outlet chamber 14. The water guide column 17 is disposed in the drip irrigation inlet chamber 13, and the elastic diaphragm 16 is disposed in the drip irrigation outlet chamber 14. One end of the external drip irrigation coupling 15 is connected to the drip irrigation outlet channel, and the other end of the external drip irrigation coupling 15 is connected to the drip irrigation outlet pipe. The water guide column 17 and the elastic diaphragm 16 are fixed together. The diameter of the water guide column 17 is smaller than the diameter of the water inlet pipe. The diameter of the elastic diaphragm 16 is greater than or equal to the diameter of the water guide column 17 and smaller than the diameter of the drip irrigation outlet chamber 14. The thickness of the elastic diaphragm 16 is less than the length of the drip irrigation outlet chamber 14.

[0027] The water guide column 17 is made of a material with a density not greater than that of water. The weight of the water guide column 17 has a significant impact on its movement. If it were made of metal, it could be placed horizontally during installation without affecting water output. However, its weight would be heavy, making adjustment difficult. Therefore, using a material that can float in water would be better.

[0028] The micro-sprinkler valve core includes a micro-sprinkler outer pipe clamp 10, a piston 5, a sprinkler spring 3, and a sprinkler fixing plate 1. The sprinkler fixing plate 1 is provided with a sprinkler water permeation hole 2. The micro-sprinkler water outlet channel includes a micro-sprinkler water inlet chamber 12 and a micro-sprinkler water outlet chamber 11. One end of the micro-sprinkler outer pipe clamp 10 is connected to the micro-sprinkler water outlet channel, and the other end of the micro-sprinkler outer pipe clamp 10 is connected to the micro-sprinkler water outlet pipe. One end of the sprinkler spring 3 is fixed to the piston 5, and the other end of the sprinkler spring 3 is fixed to the sprinkler fixing plate 1. The diameter of the piston 5 is the same as the diameter of the micro-sprinkler water inlet chamber 12. When the micro-sprinkler valve core is closed, the piston 5 is located inside the micro-sprinkler water inlet chamber 12. The sprinkler fixing plate 1 is set inside the micro-sprinkler water outlet chamber 11. The diameter of the sprinkler fixing plate 1 is less than or equal to the diameter of the micro-sprinkler water outlet chamber 11, and the diameter of the sprinkler fixing plate 1 is greater than the diameter of the micro-sprinkler water outlet pipe.

[0029] The micro-irrigation valve core also includes a water-isolating ring 4, and the irrigation spring 3 is disposed inside the water-isolating ring 4. The water-isolating ring 4 effectively protects the irrigation spring 3, significantly extending its service life. The diameter of the piston 5 is the same as, or slightly larger than, the diameter of the water-isolating ring 4, but smaller than the diameter of the external micro-irrigation water pipe. The distance from the top of the water-isolating ring 4 to the top of the micro-irrigation outlet channel is greater than the thickness of the piston 5, allowing water to flow out smoothly.

[0030] When water enters the valve of this invention, the water pressure is relatively low, below 2 kg, and the micro-sprinkler valve core is in the open state. Only the drip irrigation valve core forms a water flow path, and the water flows through the drip irrigation valve core into the drip irrigation pipeline for drip irrigation. When the inlet pressure gradually increases to above 2 kg, a larger water flow pressure is applied to the guide column 17 in the drip irrigation direction. The guide column 17 presses the elastic diaphragm 16 tightly against the drip irrigation outlet, preventing water flow. At this point, the drip irrigation valve core is in the closed state. Under this water flow pressure, the water pressure squeezes the piston 5, causing the sprinkler spring 3 to compress. The piston 5 moves upward, and the micro-sprinkler valve core forms a water flow path. The water flow can flow through the guide channel into the micro-sprinkler irrigation pipeline for micro-sprinkler irrigation fertilization and pesticide application. When the valve is closed, the water pressure inside the valve is zero, and the guide column 17 of the drip irrigation valve core and the piston 5 of the micro-sprinkler valve core return to their original positions for irrigation again. For fruit trees, if integrated water and fertilizer irrigation is needed at the base of the trees, the pressure can be controlled to the drip irrigation pressure; if fertilization and pesticide spraying are needed, the inlet water pressure can be further increased until the micro-sprinkler valve is opened to spray foliar fertilizer or pesticides onto the fruit trees.

[0031] The method of using the valve in this embodiment, which can adjust the flow rate of drip irrigation and micro-sprinkler irrigation diversion pipelines according to the inlet water pressure:

[0032] 1. Drip irrigation

[0033] Open the water source valve and adjust the equipment pressure to the pressure required for drip irrigation. Water flows into the internal cavity 6 through the inlet channel 9. When the pressure is low, the water flow is insufficient to compress the piston 5, causing it to slide upwards. Therefore, no water flows through the micro-irrigation valve core, and it remains closed. At this time, water flows through both sides of the guide column 17 into the space under the drip irrigation inlet cavity 13, the drip irrigation outlet cavity 14, and the elastic diaphragm 16, forming a complete water flow path at the drip irrigation valve opening, and crop drip irrigation begins. As the water pressure gradually increases, the pressure acting on the guide column 17 also gradually increases. Under this pressure, the guide column 17 and the connected elastic diaphragm 16 are pushed to the outlet of the drip irrigation valve core, blocking the outlet and preventing water flow. Therefore, there is no water at the drip irrigation inlet, and the drip irrigation valve is closed. When the water pressure at the valve inlet decreases to zero, the pressure applied to the water guide column 17 and the elastic diaphragm 16 connected thereto also disappears. As a result, the water guide column 17 and the elastic diaphragm 16 no longer tightly block the outlet of the drip irrigation valve, and the drip irrigation valve returns to its original state and irrigation stops.

[0034] 2. Micro-sprinkler irrigation

[0035] When micro-irrigation is needed, the water pressure is increased. As the equipment pressure gradually increases to the required level, water flows through the inlet pipe of the inlet channel 9 into the internal cavity 6. Initially, the water flows through the guide column 17 into the drip irrigation inlet cavity 13 and the drip irrigation outlet cavity 14. However, as the water pressure gradually increases, the elastic diaphragm 16 and the guide column 17 are compressed, preventing water flow and thus eliminating water from the drip irrigation inlet. Simultaneously, the water compresses the piston 5, shortening the irrigation spring 3. The piston 5 and the irrigation spring 3 slide along the wall of the water-blocking ring 4 until an orifice appears, allowing water to flow outwards along the outlet channel and into the micro-irrigation pipeline through the irrigation permeable hole 2 for irrigation. When irrigation ends, the water pressure decreases, the irrigation spring 3 rebounds, closing the orifice. Simultaneously, the elastic diaphragm 16, under reduced pressure, rebounds to its original position.

[0036] The valve of this invention can effectively switch between micro-sprinkler irrigation and drip irrigation by simply adjusting the water pressure. After irrigation, all components return to their initial state. At the same time, the valve has a simple internal structure, is easy to maintain, and has low cost.

[0037] Example 2

[0038] like Figure 3 As shown, an automatic water flow switching valve has a structure basically the same as that of Embodiment 1. The difference in this embodiment is that the structure of the drip irrigation valve core is different, as detailed below:

[0039] The drip irrigation valve core includes an external drip irrigation coupling, a sealing plate 18, a sealing ring 19, a drip irrigation spring 20, a drip irrigation fixing plate 21, and a drip irrigation water permeable hole 22. The drip irrigation water outlet channel includes a drip irrigation inlet chamber and a drip irrigation outlet chamber. One end of the external drip irrigation coupling is connected to the drip irrigation outlet channel, and the other end of the external drip irrigation coupling is connected to the drip irrigation outlet pipe. One end of the drip irrigation spring 20 is fixed to the sealing plate 18, and the other end of the drip irrigation spring 20 is fixed to the drip irrigation fixing plate 21. The sealing ring 19 is fixed to the sealing plate 18. The diameter of the sealing plate 18 is not less than the diameter of the drip irrigation inlet cavity. In this embodiment, the diameter of the sealing plate 18 is greater than the diameter of the drip irrigation inlet cavity. The drip irrigation fixing plate 21 is disposed in the drip irrigation outlet cavity. The diameter of the drip irrigation fixing plate 21 is less than or equal to the diameter of the drip irrigation outlet cavity. In this embodiment, the diameter of the drip irrigation fixing plate 21 is less than the diameter of the drip irrigation outlet cavity. The diameter of the drip irrigation fixing plate 21 is greater than the diameter of the micro-sprinkler irrigation outlet pipe. The drip irrigation permeable hole 22 is disposed at the center of the drip irrigation fixing plate 21, and the diameter of the drip irrigation permeable hole 22 is less than the diameter of the sealing plate 18.

[0040] The spring force of drip irrigation springs is different from that of sprinkler irrigation springs. The spring force of drip irrigation springs is less than that of sprinkler irrigation springs. When the drip irrigation spring is compressed to the bottom, the sprinkler irrigation spring begins to be compressed, thus realizing the alternation of drip irrigation and sprinkler irrigation.

[0041] The drip irrigation process in this embodiment is as follows:

[0042] Open the water source valve and adjust the equipment pressure to the pressure required for drip irrigation. Water flows into the internal cavity through the inlet channel. When the pressure is low, the water flow is insufficient to compress the piston and cause it to slide upwards. Therefore, no water flows through the micro-irrigation valve core, and it remains closed. At this time, the pressure of the water flow can compress the drip irrigation spring 20, causing it to compress. Water then enters the drip irrigation inlet cavity and drip irrigation outlet cavity through both sides, forming a complete water flow path with the drip irrigation permeable holes 22 of the drip irrigation fixing plate 21, and crop drip irrigation begins. As the water pressure gradually increases, the pressure acting on the sealing plate 18 also gradually increases. Under this pressure, the sealing ring 19 and the drip irrigation spring 20 connected to it are pushed to the outlet of the drip irrigation valve core. The sealing ring 19 and the sealing plate 18 block the outlet, preventing water from flowing through. Therefore, there is no water at the drip irrigation inlet, and the drip irrigation valve is closed. When the water pressure at the valve inlet decreases to zero, the pressure applied to the sealing plate 18 and the drip irrigation spring 20 connected thereto also disappears. As a result, the sealing plate 18 and the sealing ring 19 no longer tightly block the outlet of the drip irrigation valve, and the drip irrigation valve returns to its original state and irrigation stops.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water flow automatic switching valve characterized by: The valve body includes an inlet channel, a drip irrigation outlet channel, a micro-sprinkler irrigation outlet channel, and an internal cavity. The inlet channel, drip irrigation outlet channel, and micro-sprinkler irrigation outlet channel are connected through the internal cavity. The drip irrigation outlet channel contains a drip irrigation valve core that closes as the inlet water pressure increases. The micro-sprinkler irrigation outlet channel contains a micro-sprinkler irrigation valve core that opens as the inlet water pressure increases. When the drip irrigation valve core is open, the micro-sprinkler irrigation valve core is closed; when the drip irrigation valve core is closed, the micro-sprinkler irrigation valve core is open. The micro-sprinkler irrigation valve core includes a micro-sprinkler irrigation outer pipe clamp, a piston, a micro-sprinkler irrigation spring, and a micro-sprinkler irrigation fixing plate. A micro-sprinkler irrigation nozzle is mounted on the micro-sprinkler irrigation fixing plate. The micro-sprinkler irrigation water outlet channel includes a micro-sprinkler irrigation inlet chamber and a micro-sprinkler irrigation outlet chamber. One end of the micro-sprinkler irrigation outer pipe clamp is connected to the micro-sprinkler irrigation outlet channel, and the other end of the micro-sprinkler irrigation outer pipe clamp is connected to the micro-sprinkler irrigation outlet pipe. One end of the micro-sprinkler irrigation spring is fixed to the piston, and the other end of the micro-sprinkler irrigation spring is fixed to the micro-sprinkler irrigation fixing plate. The diameter of the piston is the same as the diameter of the micro-sprinkler irrigation inlet chamber. When the micro-sprinkler irrigation valve core is closed, the piston is located in the micro-sprinkler irrigation inlet chamber. The micro-sprinkler irrigation fixing plate is set in the micro-sprinkler irrigation outlet chamber, and the diameter of the micro-sprinkler irrigation fixing plate is larger than the diameter of the micro-sprinkler irrigation outlet pipe. The drip irrigation valve core includes a drip irrigation outer pipe clamp, a sealing plate, a sealing ring, a drip irrigation spring, a drip irrigation fixing plate, and a drip irrigation water permeable hole. The drip irrigation water outlet channel includes a drip irrigation inlet chamber and a drip irrigation outlet chamber. One end of the drip irrigation outer pipe clamp is connected to the drip irrigation outlet channel, and the other end of the drip irrigation outer pipe clamp is connected to the drip irrigation outlet pipe. One end of the drip irrigation spring is fixed to the sealing plate, and the other end of the drip irrigation spring is fixed to the drip irrigation fixing plate. The sealing ring is fixed to the sealing plate. The diameter of the sealing plate is not less than the diameter of the drip irrigation inlet chamber. The drip irrigation fixing plate is located in the drip irrigation outlet chamber, and the diameter of the drip irrigation fixing plate is less than or equal to the diameter of the drip irrigation outlet chamber. The diameter of the drip irrigation fixing plate is greater than the diameter of the micro-sprinkler irrigation outlet pipe. The drip irrigation water permeable hole is located at the center of the drip irrigation fixing plate, and the diameter of the drip irrigation water permeable hole is smaller than the diameter of the sealing plate. The valve body has a smooth, curved metal shell on the outside.

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