Drip irrigation device for tea planting

Abstract

The invention relates to the technical field of agricultural fertilization, in particular to a drip irrigation device for tea planting, which comprises a water and fertilizer tank mounted on a support, a liquid inlet at the top of the water and fertilizer tank is externally connected with a water and fertilizer pump, a liquid outlet at the bottom of the water and fertilizer tank is communicated with a connector, and a liquid outlet port of the connector is hermetically communicated with a branch pipe. The end part of the branch pipe is communicated with a fertilization pipe, and an open-close type water dropper is mounted in the fertilization pipe; the fertilizer applicator further comprises a blow-down valve arranged at an outlet of the tail branch pipe, a plug is slidably mounted in the blow-down valve, a first spring is arranged between the blow-down valve and the plug, and a sealing mechanism is arranged on the fertilizer applying pipe. The blow-down valve is arranged at the outlet of the tail-section branch pipe, and the air bag and the closing plate are integrated on the fertilization pipe, so that when the water pressure exceeds a preset threshold value of the plug, the blow-down valve is automatically opened, deposited impurities in the pipe are intensively discharged, regular self-cleaning without manual intervention is realized, and the blocking risk is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of agricultural fertilization technology, specifically to a drip irrigation device for tea cultivation. Background Technology

[0002] In the tea cultivation industry, the coordinated management of water and fertilizer is a core element determining the growth status of tea trees, tea quality, and final yield. Traditional fertilization methods often involve spreading solid fertilizers on the surface and then relying on artificial or natural rainfall to dissolve and infiltrate them. This not only results in low fertilizer utilization but also easily leads to excessively high local concentrations that can burn the roots, or uneven nutrient distribution that affects the absorption of nutrients by the tea trees. Especially in hilly and mountainous tea gardens, it is difficult to achieve uniform and quantitative fertilization in the early stages of planting or during critical growth periods.

[0003] With the development of agricultural fertilization technology, liquid fertilizer application devices have gradually become an important choice for tea garden fertilization due to their advantages such as precise fertilization and simultaneous water and fertilizer integration. A search revealed Chinese patent CN119302099B, which discloses a drip irrigation device for tea cultivation. The device includes a tank with a baffle fixedly connected inside. A first turntable is located on one side of the baffle, and a third support column is mounted on the first turntable. A first connecting rod is located on the side of the baffle near the inner wall of the tank. The third support column is rotatably connected to the first connecting rod, and a fourth support column is fixedly connected to the first turntable. This drip irrigation device utilizes a dual-head motor to drive a rack and pinion to reciprocate, causing the gears to rotate intermittently. This causes an arched plate to rotate within an arched groove at the bottom of the mixing tank, achieving intermittent fertilizer release to improve the mixing efficiency of the liquid fertilizer. However, limitations still exist in the fertilizer delivery and application process.

[0004] First, liquid fertilizers (such as compound fertilizers containing phosphorus, potassium, and calcium) are prone to crystallization during transportation due to concentration changes or temperature fluctuations, leading to deposits and blockages in the distribution pipes and outlets, severely affecting the uniformity of fertilizer distribution and system stability. Second, traditional fertilization devices struggle to remove internal deposits, easily resulting in fertilizer waste and uneven application. Therefore, we propose a drip irrigation device for tea cultivation, aiming to overcome the aforementioned defects in existing fertigation technologies at the fertilizer delivery end, focusing on solving the problems of fertilizer crystallization and blockage in distribution, ensuring the continuity and stability of nutrient supply. Summary of the Invention

[0005] To overcome the problem of clogging of fertilizer channels caused by crystallization and impurity deposition during the application of water-soluble fertilizers in the prior art, this invention provides a drip irrigation device for tea cultivation with self-cleaning function, ensuring that fertilizer solution is stably and evenly delivered to the root zone throughout the entire tea tree cultivation cycle.

[0006] The technical implementation of this invention is as follows: A drip irrigation device for tea cultivation includes a support frame and a water-fertilizer tank. The water-fertilizer tank is mounted on the support frame and is used to store water and fertilizer raw materials. A water-fertilizer pump is connected to the inlet at the top of the water-fertilizer tank, and a connector is connected to the outlet at the bottom of the water-fertilizer tank. The outlet of the connector is sealed and connected to a branch pipe, which is a flexible hose. A fertilizer application pipe for fertilization is connected to the end of the branch pipe. An openable dripper for applying steady-flow liquid fertilizer is installed inside the fertilizer application pipe. The water-fertilizer outlet of the openable dripper extends through the side wall of the fertilizer application pipe. The branch pipe and the fertilizer application pipe are alternately laid and connected according to the liquid fertilizer application requirements. The device also includes a drain valve located at the outlet of the last branch pipe. A plug is slidably installed, and a first spring is provided between the drain valve and the plug. The plug blocks the drain valve under the action of the first spring. A sealing mechanism is provided on the fertilizer pipe. The sealing mechanism includes a sealing plate rotatably connected to the outer wall of the fertilizer pipe via a shaft. The two sides of the shaft of the sealing plate are arc-shaped plates, and the axis of the shaft of the sealing plate is perpendicular to the extension direction of the arc-shaped plates. A guide ring is fixedly connected to the outer side of the shaft of the sealing plate. A spring is fixedly provided on the outer wall of the fertilizer pipe. The spring is located in the guide ring on the same side of the sealing plate. An opening is opened on the side wall of the fertilizer pipe. An air bladder is sealed inside the opening of the fertilizer pipe. The air bladder is open on the side facing the fertilizer pipe. The air bladder and the inner wall of the arc-shaped plate on one side of the sealing plate contact the water and fertilizer outlet.

[0007] Optionally, the openable dripper is composed of a first petal frame and a second petal frame. The first petal frame is fixedly installed on the inner wall of the fertilizer tube. The second petal frame is hinged to one side of the first petal frame via a connecting shaft. The first petal frame and the second petal frame can be sealed together. The first petal frame is provided with a water and fertilizer outlet, which extends to the outside of the fertilizer tube. The first petal frame and the second petal frame are provided with a labyrinth flow channel for stabilizing the flow. Multiple water inlets are opened on both sides of the second petal frame, and each water inlet is guided to the labyrinth flow channel.

[0008] Optionally, a sealing ring is provided circumferentially on the inner wall of the arc-shaped plate on the side away from the airbag on the sealing plate, and the sealing ring is used to seal and block the water and fertilizer outlet.

[0009] Optionally, a guide frame is fixedly connected inside the fertilizer pipe, a drive frame is slidably installed on the guide frame, a second spring is provided between the drive frame and the fertilizer pipe, connecting rings are symmetrically fixed at both ends of the drive frame, and a top rod is fixedly connected to the connecting ring. The top rod passes through the side wall of the fertilizer pipe in a sealed manner, and the top rod is located at the arc-shaped plate on the side of the sealing plate where the sealing ring is provided.

[0010] Optionally, connecting rods are fixedly provided on both sides of the outer wall of the second petal frame, and the connecting rods are located in the connecting ring on the same side of the drive frame.

[0011] Optionally, a sealing ring is provided at the connection between the branch pipe and the adjacent fertilizer pipe. The sealing ring is tightly fitted around the outer periphery of the fertilizer pipe insertion end or embedded in the inner wall groove of the branch pipe interface.

[0012] Optionally, a downward-sloping guide plate is fixedly installed on the side of the fertilizer pipe near the water and fertilizer outlet. The guide plate is used to precisely guide the water and fertilizer mixture in the fertilizer pipe to the fertilization area of ​​the tea tree roots.

[0013] Optionally, an ultrasonic generator is installed on the side of the connector away from the branch pipe, and an amplitude transformer is fixedly installed on the vibrating head of the ultrasonic generator, with the amplitude transformer located inside the connector.

[0014] The present invention has the following advantages:

[0015] 1. This invention installs a drain valve at the outlet of the tail branch pipe and integrates an airbag and a sealing plate on the fertilizer pipe. When the water pressure exceeds the preset threshold of the plug, the drain valve automatically opens to discharge the deposited impurities in the pipe, achieving regular self-cleaning without manual intervention and effectively reducing the risk of blockage during fertilizer distribution.

[0016] 2. The present invention is set with an openable dripper composed of a first petal frame and a second petal frame, and integrates a labyrinth flow channel structure inside, which effectively buffers the water and fertilizer flow pressure and significantly reduces flow fluctuations, thereby ensuring uniform water output and stable rate during the water and fertilizer distribution process. At the same time, the openable dripper is also easy to self-clean.

[0017] 3. This invention integrates an ultrasonic generator at the connector to promote uniform dissolution of fertilizer using high-frequency vibration, thereby reducing particle deposition from the source and improving the application effect of liquid fertilizer. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the branch pipe and fertilizer pipe of the present invention.

[0020] Figure 3 This is a schematic diagram of the fertilizer application pipe, sealing ring, guide plate, and sealing plate of the present invention.

[0021] Figure 4 This is a cross-sectional view of the fertilizer application pipe and the sealing plate of the present invention.

[0022] Figure 5 This is a diagram showing the fit and relationship between the sealing plate, guide frame, drive frame, connecting ring, and top rod of the present invention.

[0023] Figure 6 This is a diagram showing the connection relationship between the fertilizer pipe, guide frame, drive frame, connecting ring, and top rod of the present invention.

[0024] Figure 7 This is a schematic diagram showing the mating relationship of the first petal frame, the second petal frame, and the connecting ring of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the internal structure of the opening and closing dripper of the present invention.

[0026] Figure 9 This is a schematic diagram of the connector, ultrasonic generator, and amplitude transformer of the present invention.

[0027] The meanings of the labels in the attached diagram are as follows: 1: Support, 2: Water and fertilizer tank, 3: Connector, 4: Branch pipe, 5: Fertilizer pipe, 51: Sealing ring, 52: Guide plate, 6: Drain valve, 61: Plug, 62: First spring, 7: Sealing mechanism, 71: Sealing plate, 711: Sealing ring, 72: Guide ring, 73: Spring, 74: Airbag, 8: Opening dripper, 81: First petal frame, 811: Water and fertilizer outlet, 82: Second petal frame, 821: Connecting rod, 83: Labyrinth flow channel, 84: Water inlet, 91: Guide frame, 92: Drive frame, 921: Connecting ring, 922: Top rod, 93: Second spring, 11: Ultrasonic generator, 12: Amplitude rod. Detailed Implementation

[0028] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] A drip irrigation device for tea cultivation, see [link / reference] Figures 1-4As shown, the system includes a support frame 1 and a water-fertilizer tank 2. The water-fertilizer tank 2 is mounted on the support frame 1 and is used to store water-fertilizer raw materials. A water-fertilizer pump is connected to the liquid inlet at the top of the water-fertilizer tank 2, and a connector 3 is connected to the liquid outlet at the bottom of the water-fertilizer tank 2. The liquid outlet of the connector 3 is sealed and connected to a branch pipe 4, which is a flexible hose. A fertilizer application pipe 5 for fertilization is connected to the end of the branch pipe 4. An openable dripper 8 for steady-flow liquid fertilizer application is installed inside the fertilizer application pipe 5. The water-fertilizer outlet 811 of the openable dripper 8 extends out of the side wall of the fertilizer application pipe 5. The branch pipe 4 and the fertilizer application pipe 5 are laid alternately and connected according to the water-fertilizer application requirements. The system also includes a drain valve 6 located at the outlet of the last branch pipe 4. A plug 61 is slidably installed inside the drain valve 6. The drain valve 6 and the plug are connected together. A first spring 62 is installed between 61. The plug 61 blocks the drain valve 6 under the action of the first spring 62. A sealing mechanism 7 is installed on the fertilizer pipe 5. The sealing mechanism 7 includes a sealing plate 71 rotatably connected to the outer wall of the fertilizer pipe 5 via a shaft. The two sides of the shaft of the sealing plate 71 are arc-shaped plates. The axis of the shaft of the sealing plate 71 is perpendicular to the extension direction of the arc-shaped plates. A guide ring 72 is fixedly connected to the outer side of the shaft of the sealing plate 71. A spring piece 73 is fixedly installed on the outer wall of the fertilizer pipe 5. The spring piece 73 is located in the guide ring 72 on the same side of the sealing plate 71. The elastic force of the spring piece 73 is less than the elastic force of the first spring 62. An opening is opened on the side wall of the fertilizer pipe 5. An air bladder 74 is sealed inside the opening of the fertilizer pipe 5. The side of the air bladder 74 facing the fertilizer pipe 5 is open. The airbag 74 and the inner wall of the arc-shaped plate on one side of the sealing plate 71 are in contact. A sealing ring 711 is provided circumferentially on the inner wall of the arc-shaped plate on the other side of the sealing plate 71. The sealing ring 711 is used to block and seal the water and fertilizer outlet 811. When applying liquid fertilizer, a water and fertilizer pump is first connected to the inlet of the water and fertilizer tank 2. The water and fertilizer are then continuously pumped into the water and fertilizer tank 2 and the connector 3. After passing through the connector 3, the water and fertilizer flow through multiple alternately connected branch pipes 4 and fertilizer pipes 5. At this time, the drain valve 6 on the last branch pipe 4 is blocked by the plug 61 under the action of the first spring 62. The water and fertilizer at normal fertilizer pressure cannot be discharged from the drain valve 6. The water and fertilizer are forced to drip out from the water and fertilizer outlet 811 after being stabilized by the openable dripper 8. When the fertilizer pipe is used for a long time, When the wall is clogged with deposits, the external water and fertilizer pump stops pumping water and fertilizer and instead injects dredging water into the branch pipe 4 and fertilizer pipe 5. As the water pressure increases but does not reach the preset pressure of the plug 61 in the drain valve 6, the air bladder 74 at the fertilizer pipe 5 expands under the water pressure and overcomes the elastic force of the spring 73 to press the arc plate on one side of the sealing plate 71. The sealing plate 71 rotates and seals the water and fertilizer outlet 811 of the fertilizer pipe 5 through the arc plate on its other side. The greater the water pressure, the tighter the sealing plate 71 can close the water and fertilizer outlet 811, until the water pressure increases to exceed the preset pressure of the plug 61 in the drain valve 6. The water pressure will discharge the impurities and dirt accumulated in the branch pipe 4 and fertilizer pipe 5 from the drain valve 6, thereby achieving the effect of regularly dredging and draining the device.

[0030] See Figure 4 , Figure 5 and Figure 8As shown, the openable dripper 8 is composed of a first flap frame 81 and a second flap frame 82. The first flap frame 81 is fixedly installed on the inner wall of the fertilizer pipe 5. The second flap frame 82 is hinged to one side of the first flap frame 81 via a connecting shaft. The first flap frame 81 and the second flap frame 82 can be sealed together. The water and fertilizer outlet 811 is specifically located on the first flap frame 81 and extends to the outside of the fertilizer pipe 5. The first flap frame 81 and the second flap frame 82 are provided with a labyrinth flow channel 83 for stabilizing the flow. Multiple water inlets 84 are opened on both sides of the second flap frame 82. Each water inlet 84 is directed to the labyrinth flow channel 83. The water and fertilizer in the fertilizer pipe 5 flow into the tightly sealed openable dripper 8 from the multiple water inlets 84. Then the water and fertilizer flow into the labyrinth flow channel 83. Under the resistance of the labyrinth flow channel 83, the pressure of the water and fertilizer outlet flow is reduced, so as to achieve a relatively stable dripping rate of the openable dripper 8.

[0031] See Figure 5 and Figure 6 As shown, a guide frame 91 is fixedly connected inside the fertilizer pipe 5. A drive frame 92 is slidably installed on the guide frame 91. A second spring 93 is provided between the drive frame 92 and the fertilizer pipe 5. The sum of the elastic forces of the second spring 93 and the spring sheet 73 is still less than the elastic force of the first spring 62. Connecting rings 921 are symmetrically fixed at both ends of the drive frame 92. A top rod 922 is fixedly connected to the connecting ring 921. The top rod 922 passes through the side wall of the fertilizer pipe 5 in a sealed manner. The top rod 922 is located at the arc-shaped plate on the side of the sealing plate 71 where the sealing ring 711 is provided.

[0032] See Figure 5 and Figure 7 As shown, connecting rods 821 are fixedly installed on both sides of the outer wall of the second petal frame 82. The connecting rods 821 are located in the connecting ring 921 on the same side of the drive frame 92. When the branch pipe 4 and the fertilizer pipe 5 are periodically drained, the airbag 74 expands under the water pressure of the fertilizer pipe 5 and squeezes the sealing plate 71 to rotate. During the rotation of the sealing plate 71 to seal the water and fertilizer outlet 811, it squeezes and pushes the top rod 922. The top rod 922 drives the connecting ring 921 and the drive frame 92 to move together against the elastic force of the second spring 93. At this time, the connecting ring 921 drives the second petal frame 82 to rotate and open from the first petal frame 81 through the connecting rod 821, so that the internal structure of the openable drip head 8 can be flushed by water pressure.

[0033] See Figure 2 and Figure 3 As shown, a sealing ring 51 is provided at the connection between the branch pipe 4 and the adjacent fertilizer pipe 5. A downward-sloping guide plate 52 is fixedly installed on the side of the fertilizer pipe 5 near the water and fertilizer outlet 811. The guide plate 52 is used to accurately guide the water and fertilizer mixture in the fertilizer pipe 5 to the fertilization area of ​​the tea tree roots.

[0034] During tea fertilization, the device pumps pre-mixed liquid fertilizer through the inlet at the top of the water-fertilizer tank 2 via an external water-fertilizer pump. The fertilizer then exits through the outlet at the bottom of the tank and enters the connector 3. The fertilizer then flows into the branch pipe 4, which is sealed to the connector 3. Since the branch pipe 4 and the fertilization pipe 5 are alternately laid and connected according to the direction of the tea garden furrows, the fertilizer can be distributed to each section of the fertilization pipe 5. In this operating state, the drain valve 6 at the outlet of the branch pipe 4 remains closed due to the pre-tightening force of the first spring 62 on its internal plug 61, preventing leakage of fertilizer. At this time, the pressurized fertilizer is forced from the inlet 84 into the openable dripper 8 inside the fertilization pipe 5. The openable dripper 8 is formed by the first petal frame 81 and... The second petal frame 82 is connected by a hinge. Under the action of the second spring 93, the first petal frame 81 and the second petal frame 82 are tightly closed together. The water pressure causes water and fertilizer to flow from the inlet 84 into the cavity formed after the two are closed. The labyrinth flow channel 83 set inside the flow channel of the openable dripper 8 generates significant resistance to the water and fertilizer, effectively reducing its pressure and converting it into a stable and slow flow. Finally, the water and fertilizer seep out evenly from the water and fertilizer outlet 811 on the first petal frame 81. Under the guidance of the guide plate 52, precise irrigation of the tea tree root zone is achieved. At this time, the sealing mechanism 7 on the fertilizer pipe 5 does not expand significantly because the internal water pressure is within the normal fertilization range. The sealing plate 71 is stationary under the positioning of the spring piece 73, ensuring that the water and fertilizer outlet 811 remains unobstructed.

[0035] After the device has been running for a period of time, in order to prevent the fertilizer pipe 5 and the openable dripper 8 from being blocked by water and fertilizer deposits, it is necessary to regularly flush and unclog the branch pipe 4 and the fertilizer pipe 5. At this time, the water and fertilizer pump connected to the inlet of the water and fertilizer tank 2 stops delivering water and fertilizer and instead injects high-pressure clean water into the device. As the clean water continues to be injected, the water pressure inside the branch pipe 4 and the fertilizer pipe 5 gradually increases. Before the water pressure reaches the opening threshold of the plug 61 in the drain valve 6, the air bladder 74 sealed in the opening on the side wall of the fertilizer pipe 5 first expands under pressure. The expanded air bladder 74 overcomes the elasticity of the spring 73 and pushes the sealing plate 7 outward. The arc-shaped plate on one side of the sealing plate 71 forces the sealing plate 71 to rotate around its axis, causing the arc-shaped plate on the other side of the sealing plate 71 and the sealing ring 711 set thereon to tightly cover the water and fertilizer outlet 811, blocking and sealing the water and fertilizer outlet 811. As the water pressure increases, the pressing force of the sealing ring 711 on the water and fertilizer outlet 811 becomes greater, ensuring the reliability of the seal of the water and fertilizer outlet 811. At the same time, during the process of the sealing plate 71 rotating to close the water and fertilizer outlet 811, it will simultaneously squeeze and push the push rod 922. The push rod 922 drives the connecting ring 921 and the drive frame 92 along the guide frame. 91 slides and compresses the second spring 93. The movement of the drive frame 92 is transmitted to the second petal frame 82 through the connecting rod 821, hinged open from the closed state with the first petal frame 81, so that the labyrinth flow channel 83 inside the openable dripper 8 is fully exposed, thereby eliminating the cleaning dead corner of the labyrinth flow channel 83 inside the openable dripper 8, and making it easy for high-pressure water to directly flush away the impurities accumulated inside. When the water pressure in the fertilizer pipe 5 continues to accumulate and eventually exceeds the preset clamping force of the first spring 62 on the plug 61 in the drain valve 6, the plug 61 is suddenly pushed open by the high-pressure water, and the impurities accumulated in the entire pipe are discharged. Impurities and dirt in the net are discharged uniformly and at high speed from the outlet of the drain valve 6 of the terminal branch pipe 4 under the action of the instantaneous burst of flushing force, thus efficiently completing the dredging and cleaning of the entire device, restoring the pipeline flow capacity for the next round of efficient fertilization. After the sewage discharge is completed, the plug 61 is reset and sealed under the action of the first spring 62, the air bag 74 contracts, the sealing plate 71 rotates and resets under the elastic force of the spring plate 73, and the second petal frame 82 is also re-closed with the first petal frame 81 under the action of the second spring 93. The device re-enters the normal fertilization state and realizes efficient and self-cleaning cycle operation.

[0036] See Figure 1 and Figure 9 As shown, an ultrasonic generator 11 is installed on the side of the connector 3 away from the branch pipe 4. An amplitude transformer 12 is fixedly installed on the vibrating head of the ultrasonic generator 11. The amplitude transformer 12 is located inside the connector 3. The ultrasonic generator 11 generates high-frequency vibration at the connector 3 through the amplitude transformer 12, so that the fertilizer can be dissolved in the water more evenly and the risk of water and fertilizer particles being deposited and blocked in the pipe wall is reduced.

[0037] During the application of water and fertilizer, the ultrasonic generator 11 integrated at the connector 3 is activated. The vibrating head of the ultrasonic generator 11 generates high-frequency mechanical vibration, which is amplified by the amplitude transformer 12 and transmitted to the flow channel inside the connector 3. When the water and fertilizer flow through this area, they are subjected to strong high-frequency vibration and cavitation, which can effectively disperse and crush any small particles and crystals that may exist in the liquid fertilizer, promoting faster and more uniform dissolution of the fertilizer in the water to form a uniform and stable liquid fertilizer. This pretreatment process significantly reduces the risk of fertilizer particles depositing in the subsequent branch pipe 4 and fertilizer application pipe 5 from the source. Together with the regular sewage discharge function, it forms a dual guarantee for the long-term stable operation of the maintenance device and the prevention of blockage.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drip irrigation device for tea cultivation, comprising a water and fertilizer tank (2) mounted on a bracket (1), wherein a connector (3) is connected to the liquid outlet at the bottom of the water and fertilizer tank (2), a branch pipe (4) is connected to the connector (3), a fertilizer pipe (5) is connected to the end of the branch pipe (4), and an openable dripper (8) is provided inside the fertilizer pipe (5), wherein the branch pipe (4) and the fertilizer pipe (5) are alternately laid and connected; Its features are, It also includes a drain valve (6) installed at the outlet of the last branch pipe (4), a plug (61) is slidably installed inside the drain valve (6), a first spring (62) is provided between the drain valve (6) and the plug (61), the plug (61) blocks the drain valve (6) under the action of the first spring (62), and a sealing mechanism (7) is provided on the fertilizer pipe (5). The sealing mechanism (7) includes a sealing plate (71) rotatably connected to the outer wall of the fertilizer pipe (5) via a shaft. The two sides of the shaft of the sealing plate (71) are arc-shaped plates. A guide ring (72) is fixedly connected to the outer side of the shaft of the sealing plate (71). A spring piece (73) is fixedly provided on the outer wall of the fertilizer pipe (5). The spring piece (73) is located in the guide ring (72) on the same side of the sealing plate (71). An opening is provided on the side wall of the fertilizer pipe (5). An air bag (74) is sealed inside the opening of the fertilizer pipe (5). The air bag (74) is open on the side facing the fertilizer pipe (5). The air bag (74) is in contact with the arc-shaped plate on one side of the sealing plate (71).

2. A drip irrigation device for tea cultivation according to claim 1, characterized in that, The opening and closing dripper (8) is composed of a first petal frame (81) and a second petal frame (82). The first petal frame (81) is fixed on the inner wall of the fertilizer pipe (5). The second petal frame (82) is hinged to one side of the first petal frame (81) via a connecting shaft. The first petal frame (81) and the second petal frame (82) are sealed together. A water and fertilizer outlet (811) is provided on the first petal frame (81). The water and fertilizer outlet (811) extends to the outside of the fertilizer pipe (5). A labyrinth flow channel (83) is provided inside the first petal frame (81) and the second petal frame (82). Multiple water inlets (84) are provided on both sides of the second petal frame (82). Each water inlet (84) is guided to the labyrinth flow channel (83).

3. A drip irrigation device for tea cultivation according to claim 2, characterized in that, A sealing ring (711) is provided on the inner wall of the arc-shaped plate on the side away from the airbag (74) of the sealing plate (71). The sealing ring (711) is used to seal and block the water and fertilizer outlet (811).

4. A drip irrigation device for tea cultivation according to claim 1, characterized in that, A guide frame (91) is fixedly connected inside the fertilizer pipe (5). A drive frame (92) is slidably installed on the guide frame (91). A second spring (93) is provided between the drive frame (92) and the fertilizer pipe (5). Connecting rings (921) are symmetrically fixed at both ends of the drive frame (92). A top rod (922) is fixedly connected to the connecting ring (921). The top rod (922) passes through the side wall of the fertilizer pipe (5) and is located at the arc-shaped plate on the side of the sealing plate (71) where the sealing ring (711) is provided.

5. A drip irrigation device for tea cultivation according to claim 2, characterized in that, The second petal frame (82) has connecting rods (821) fixedly installed on both sides of the outer wall of the frame. The connecting rods (821) are located in the connecting ring (921) on the same side of the drive frame (92).

6. A drip irrigation device for tea cultivation according to claim 1, characterized in that, A sealing ring (51) is provided at the connection between the branch pipe (4) and the adjacent fertilizer pipe (5).

7. A drip irrigation device for tea cultivation according to claim 2, characterized in that, A guide plate (52) is fixedly installed on the outer wall of the fertilizer pipe (5) near the water and fertilizer outlet (811). The guide plate (52) is used to precisely guide the water and fertilizer mixture in the fertilizer pipe (5) to the fertilization area of ​​the tea tree roots.

8. A drip irrigation device for tea cultivation according to claim 1, characterized in that, An ultrasonic generator (11) is installed on the side of the connector (3) away from the branch pipe (4). An amplitude transformer (12) is fixedly installed on the vibrating head of the ultrasonic generator (11). The amplitude transformer (12) is located inside the connector (3).

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