Water and fertilizer drip irrigation device

Abstract

A water and fertilizer drip irrigation device belongs to the technical field of water and fertilizer drip irrigation and comprises a first filter, a water pump, an injection pipe and a fertilization tank which are sequentially connected, and a main pipeline of an outlet of the fertilization tank is connected with a fourth control valve, a flow valve and a plurality of drippers; the device further comprises a premixing tank, a heating device and a first stirring device are installed in the premixing tank, and the bottom of the premixing tank is connected with the injection pipe. A second stirring device is mounted in the fertilizing tank. A water source is filtered through a first filter, and through three-stage mixing, namely accelerating dissolution through a heating device of a premixing tank, stirring and premixing through a first stirring device, secondary mixing through an injection pipe and stirring and mixing through a second stirring device in a fertilization tank, high efficiency, thoroughness and uniformity of fertilizer mixing are achieved, the fertilization efficiency is improved, and the situation that a water dropper is blocked is effectively avoided; normal drip irrigation operation is guaranteed, and maintenance cost is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of water and fertilizer drip irrigation technology, specifically a water and fertilizer drip irrigation device. Background Technology

[0002] Drip irrigation is an agricultural technology that combines irrigation and fertilization. It uses drippers to slowly and evenly deliver water and fertilizer dissolved in the water into the soil around the plant roots, allowing the plants to directly absorb and utilize the water and nutrients, maximizing water and fertilizer utilization. Drip irrigation is widely applicable to various agricultural and horticultural crops, such as vegetables, fruit trees, flowers, cotton, and tobacco.

[0003] Drip irrigation has the following advantages:

[0004] Significant water-saving effect: Compared with traditional irrigation methods, drip irrigation can precisely control the amount of water, reduce water evaporation and seepage loss, and can generally save 30%-70% of water.

[0005] Improve fertilizer utilization: Fertilizers reach plant roots directly with water droplets, avoiding volatilization, leaching, and fixation of fertilizers in the soil, thus increasing fertilizer utilization by 30%-50%.

[0006] Improve the soil environment: Drip irrigation keeps the soil moist but not too wet, which is conducive to soil aeration, promotes the growth and development of plant roots, and reduces soil compaction and salinization.

[0007] Precision control: It can precisely adjust the supply of water and fertilizer according to the water and fertilizer requirements of different crops and different growth stages, so as to achieve precision irrigation and fertilization and improve crop yield and quality.

[0008] Labor saving: The drip irrigation system is highly automated. After installation, it only requires regular inspection and maintenance. There is no need for a large number of people to carry out irrigation and fertilization operations, which reduces labor intensity and costs.

[0009] However, in practical applications, traditional drip irrigation systems face severe technical challenges. Agricultural irrigation water comes from a wide range of sources, some of which have poor water quality and contain many impurities. These impurities easily accumulate in the drippers during operation, causing blockages. Simultaneously, issues related to fertilizer dissolution are also significant. If fertilizer is not completely dissolved, undissolved fertilizer particles can enter the drippers with the water flow, further exacerbating the risk of blockage. Furthermore, external environmental factors such as plant stems and leaves, and dust can also cause blockages. Blockage not only disrupts the uniform irrigation effect and affects crop growth but also significantly increases system maintenance costs, including frequent equipment repairs and dripper replacements, severely hindering the further promotion and application of drip irrigation technology. Utility Model Content

[0010] To address the problem that traditional drip irrigation systems often experience dripper clogging due to poor water quality and incomplete fertilizer dissolution, which affects normal drip irrigation operations and significantly increases maintenance costs, this invention provides a drip irrigation device.

[0011] This utility model is achieved through the following technical solution:

[0012] A drip irrigation device includes a first filter, a water pump, and a fertilizer tank connected sequentially via pipes. A fourth control valve, a flow valve, and several drippers are sequentially connected to the bottom outlet of the fertilizer tank via a main pipe. An ejector pipe connects the water pump and the fertilizer tank. The device also includes a premixing tank, which contains a heating device and a first stirring device. The bottom of the premixing tank is connected to the ejector pipe via an output pipe, allowing water from the water pump outlet to be ejected into the output pipe via the ejector pipe. A second stirring device is installed inside the fertilizer tank. The main pipe is supported and fixed by spaced main pipe support frames.

[0013] A further improvement of this utility model is that the premixing tank includes a premixing tank shell with a double-layered sandwich structure and a premixing tank cover that can be detachably installed on the premixing tank shell. The heating device includes a number of electric heating devices installed in the sandwich space of the premixing tank shell, and the sandwich space of the premixing tank shell is filled with a heating liquid medium.

[0014] A further improvement of this utility model is that the premixing tank shell has several support frames that connect and support its inner and outer walls within the interlayer space.

[0015] A further improvement of this utility model is that the first stirring device includes a first motor positioned and installed on the upper part of the premix tank cover, and a first rotating rod that can extend into the premix tank is connected and installed at the output end of the first motor. The first rotating rod is provided with a plurality of first stirring blades.

[0016] A further improvement of this utility model is that the front part of the ejector tube is provided with an annular connecting channel and a plurality of second channels arranged in an annular array and connected to the connecting channel. The second channels are connected to the inner cavity of the ejector tube, and the connecting channel is connected to the output tube.

[0017] A further improvement of this utility model is that the outlet end of the second channel is inclined along the direction of the ejector tube.

[0018] A further improvement of this utility model is that a tapered transition tube is connected to the inlet end of the ejector tube.

[0019] A further improvement of this utility model is that the main pipe support frame includes a lower support rod and an upper support rod. The lower end of the lower support rod is connected to a main positioning pin, and the upper part of the upper support rod is provided with a main pipe positioning ring that can position the main pipe. The upper support rod and the lower support rod are connected by a double-section reverse threaded connecting screw.

[0020] Further improvements to this utility model include: several liquid outlet holes are provided on the side wall of the main pipe, and a cylindrical connecting tube is connected and installed at the position of the liquid outlet hole; the dripper is a cylindrical structure with one end sealed, which is screwed and installed on the inner wall of the connecting tube, and several drip holes are provided on the side wall of the dripper; a dripper protection tube that can protect the dripper is screwed and fitted on the outer wall of the connecting tube.

[0021] A further improvement of this utility model is that the outlet end of the water pump is connected to the upper part of the premixing tank and the outlet end of the flow valve through pipes, and is respectively provided with a second control valve and a first control valve; a third control valve is connected and installed at the inlet end of the ejector pipe.

[0022] As can be seen from the above technical solutions, the beneficial effects of this utility model are:

[0023] In use, first add a small amount of clean water and the required amount of water-soluble fertilizer to the premixing tank. The water in the premixing tank is heated by a heating device. The first stirring device in the premixing tank stirs the water and fertilizer, which can accelerate the dissolution rate of the fertilizer and ensure its complete dissolution. The water filtered by the first filter is pressurized and sprayed out by a water pump. The negative pressure generated by the ejector tube is used to eject the premixed water and fertilizer solution in the premixing tank. It is initially mixed in the ejector tube and then enters the fertilizer tank. The second stirring device stirs it again to achieve uniform mixing of fertilizer and water, effectively avoiding the blockage of the dripper by undissolved particles. The uniformly mixed water and fertilizer solution is drip-irrigated around the root system of the desired plants through the fourth control valve and flow valve. The main pipeline is reliably supported by the main pipeline support frame to ensure the reliability and accuracy of drip irrigation. This device filters the water source through a first filter and achieves efficient, thorough, and uniform fertilizer mixing through three-stage mixing, thereby improving fertilization efficiency, effectively avoiding dripper clogging, ensuring normal drip irrigation operations, and greatly reducing maintenance costs. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0026] Figure 2 This is a schematic diagram of the premixing tank structure according to a specific embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the ejector tube structure according to a specific embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the main pipe support frame structure according to a specific embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the dripper installation structure according to a specific embodiment of the present invention.

[0030] In the attached diagram: 1. First filter; 2. Water pump; 3. Premixing tank; 31. Premixing tank shell; 32. Premixing tank cover; 33. First motor; 34. First rotating rod; 35. First stirring blade; 36. Support frame; 37. Output pipe; 38. Second filter device; 39. Electric heating device; 4. Ejector tube; 41. Connecting channel; 42. Second channel; 43. Transition pipe; 5. Fertilizer tank; 51. Second motor; 52. Second rotating rod; 53. Second stirring blade; 6. Main pipe support frame; 61. Lower support rod; 62. Upper support rod; 63. Main pipe positioning ring; 64. Connecting screw; 65. Operating part; 66. Support plate; 67. Main positioning pin; 68. Auxiliary positioning pin; 69. Positioning screw; 7. Main pipe; 71. Connecting cylinder; 8. Dripper; 81. Dripping hole; 9. Dripper protective tube; 91. Dripping cylinder.

[0031] 11. First control valve, 12. Second control valve, 13. Third control valve, 14. Fourth control valve, 15. Flow valve. Detailed Implementation

[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0033] like Figure 1As shown, this utility model discloses a water and fertilizer drip irrigation device, including a first filter 1, a water pump 2, and a fertilizer tank 5 connected in sequence by pipes. The end of the first filter 1 away from the water pump 2 is connected to a water source through a pipe. The bottom outlet of the fertilizer tank 5 is connected in sequence by a fourth control valve 14, a flow valve 15 (controlling drip irrigation flow and pressure), and several drippers 8 through a main pipe 7. An ejector pipe 4 is connected between the water pump 2 and the fertilizer tank 5. It also includes a premixing tank 3, which is equipped with a heating device for heating the water inside and a first stirring device for stirring the water and fertilizer mixture inside. The bottom of the premixing tank 3 is connected to the ejector pipe 4 through an output pipe 37. The water flow from the outlet of the water pump 2 can be ejected into the water and fertilizer mixture through the ejector pipe 4. A second stirring device is installed inside the fertilizer tank 5. The main pipe 7 is supported and fixed by a main pipe support frame 6 arranged at intervals.

[0034] In use, first add a small amount of clean water and the required amount of water-soluble fertilizer to the premixing tank 3. The water in the premixing tank 3 is heated by a heating device (generally not exceeding 30 degrees Celsius). The first stirring device in the premixing tank 3 stirs the water and fertilizer, which can accelerate the dissolution rate of the fertilizer and ensure the thorough dissolution of the fertilizer. The water filtered by the first filter 1 is pressurized and sprayed out by the water pump 2, and negative pressure is generated through the ejector tube 4 to eject the premixed water and fertilizer solution in the premixing tank 3. It is initially mixed in the ejector tube 4 and enters the fertilizer tank 5. The second stirring device stirs it again to achieve uniform mixing of fertilizer and water, effectively avoiding the blockage of dripper 8 by undissolved particles. The uniformly mixed water and fertilizer solution is drip-irrigated around the root system of the desired plants through the fourth control valve 14 and the flow valve 15. The main pipeline 7 is reliably supported by the main pipeline support frame 6 to ensure the reliability and accuracy of drip irrigation. This device filters water through the first filter 1 and achieves high efficiency, thoroughness and uniformity of fertilizer mixing through three-stage mixing (the heating device in the premixing tank 3 accelerates dissolution, the first stirring device stirs the premixing, the ejector tube 4 performs secondary mixing, and the second stirring device in the fertilizer tank 5 stirs the mixture), thereby improving fertilization efficiency, effectively avoiding clogging of the drippers 8, ensuring normal drip irrigation operation and greatly reducing maintenance costs.

[0035] The second stirring device includes a second motor 51, which is vertically mounted on the top of the fertilizer tank 5 (cylindrical) via a mounting bracket. The lower output end of the second motor 51 is connected to a second rotating rod 52 via a coupling (aligned with the axis of the fertilizer tank 5 and rotatably connected to the top of the fertilizer tank 5 via a bearing). Several second stirring blades 53 are installed at intervals on the second rotating rod 52. The second motor 51 drives the second rotating rod 52 to rotate, and the second stirring blades 53 stir the water-fertilizer mixture inside the fertilizer tank 5, achieving thorough mixing of the water and fertilizer.

[0036] Furthermore, when the second stirring blade 53 rotates, it can push the mixture in the middle of the fertilizer tank 5 upward and circulate it downward from the periphery of the fertilizer tank 5 to achieve uniform mixing.

[0037] Among them, such as Figure 2 As shown, the premixing tank 3 includes a premixing tank shell 31 (cylindrical) with a double-walled structure and a premixing tank cover 32 detachably installed on the premixing tank shell 31. The heating device includes several electric heating devices 39 installed in the space between the premixing tank shell 31 walls, and the space between the premixing tank shell 31 walls is filled with a heating liquid medium. The outer wall of the premixing tank shell 31 is made of heat-insulating material, and the inner wall of the premixing tank shell 31 is made of heat-conducting metal material. A through hole is provided at the top of the outer wall of the premixing tank shell 31, and sealed with a rubber plug, with a cable passing through and fixed in the hole in the middle of the plug (to prevent debris from entering the gap and to ensure that the liquid level of the heating liquid medium inside is lower than the height of the rubber plug). When electricity is applied, the heating liquid medium is heated through the electric heating devices 39, and the heat is conducted through the inner wall of the premixing tank shell 31 to heat the water-fertilizer premixed solution inside the premixing tank shell 31, achieving stable and uniform heating. A temperature sensor can be installed on the shell 31 of the premixing tank to detect the temperature of the water-fertilizer premixed solution, ensuring the accuracy of heating.

[0038] The electric heating device 39 has a metal casing, an electric heating wire is installed inside the casing, and an insulating material such as magnesium oxide powder is poured into the casing to encapsulate and fix the electric heating wire in the middle of the casing so that the electric heating wire does not come into contact with the casing.

[0039] Among them, such as Figure 2 As shown, the premixing tank shell 31 has several support frames 36 connected to and supporting its inner and outer walls within the space between the shell walls. This improves the overall structural strength of the premixing tank shell 31 and prevents deformation of the inner and outer walls of the premixing tank shell 31; and the electric heating device 39 can be positioned and supported on the support frames 36, thus achieving reliable fixation of the electric heating device 39.

[0040] Among them, such as Figure 2 As shown, the first stirring device includes a first motor 33 vertically positioned and installed on the upper part of the premixing tank cover 32. The lower output end of the first motor 33 is connected to a first rotating rod 34 that can extend into the premixing tank 3. The first rotating rod 34 is provided with a plurality of first stirring blades 35. The first motor 33 drives the first rotating rod 34 to rotate, and the first stirring blades 35 are used to stir the premixed solution in the premixing tank 3, achieving uniform and efficient mixing.

[0041] Furthermore, when the first stirring blade 35 rotates, it can push the mixture in the middle of the premixing tank shell 31 upward and circulate it downward from the periphery of the premixing tank shell 31, effectively improving the stirring effect and the uniformity of mixing.

[0042] A second filter device 38 is installed on the output pipe 37. The premixing tank 3 is located above the ejector pipe 4. The second filter device 38 can filter the premixed liquid to prevent impurities in the fertilizer from entering the fertilizer tank 5 and to prevent the dripper 8 from being blocked.

[0043] like Figure 3 As shown, the ejector tube 4 has an annular connecting channel 41 and a plurality of second channels 42 arranged in an annular array and communicating with the connecting channel 41 at its front end. The second channels 42 communicate with the inner cavity of the ejector tube 4, and the connecting channel 41 communicates with the output tube 37. Through the plurality of second channels 42 arranged in an array on the annular connecting channel 41, the premixed solution and the water sprayed by the water pump can be uniformly mixed.

[0044] Furthermore, the outlet end of the second channel 42 is inclined along the direction of the ejector tube 4. For the premixed solution ejected by the second channel 42, a spiral ejection path from front to back is achieved on the inner wall of the ejector tube 4, making the mixing more uniform.

[0045] Furthermore, a tapered transition pipe 43 is connected to the inlet end of the ejector tube 4. This achieves reduced diameter and pressurization, increases the water flow velocity, and enhances the ejection power.

[0046] like Figure 4 As shown, the main pipe support frame 6 includes an upright lower support rod 61 and an upper support rod 62. The lower end of the lower support rod 61 is connected to a main positioning pin 67, and the upper part of the upper support rod 62 is equipped with a main pipe positioning ring 63 for positioning and fitting the main pipe 7. The upper support rod 62 and the lower support rod 61 are connected by a double-section reverse-threaded connecting screw 64. The main pipe 7 is positioned and fixed by the main pipe positioning ring 63, and its vertical fixation is achieved by rotating the main positioning pin 67 to insert it into the ground. The height of the main pipe positioning ring 63 can be flexibly adjusted by rotating the connecting screw 64, thus enabling adjustment of different support heights for the main pipe 7, making it more flexible, versatile, and improving its versatility. The main pipe 7 can be made of rigid materials, such as metal or rigid plastic.

[0047] Furthermore, the connecting screw 64 has a hexagonal (or quadrilateral) operating part 65 in the middle, which can facilitate the clamping and rotation of tools such as wrenches, and improve the convenience of adjusting the height of the main pipe positioning ring 63.

[0048] Furthermore, a horizontal circular support plate 66 is connected to the bottom of the lower support rod 61. The main positioning pin 67 is connected and installed in the middle of the lower side of the support plate 66, and several auxiliary positioning pins 68 are spaced apart along the lower edge of the support plate 66. By inserting the main positioning pin 67 into the ground and pressing the support plate 66 into the ground, and with the auxiliary positioning pins 68 assisting in positioning, reliable and stable overall positioning and installation of the main pipe support frame 6 is achieved.

[0049] Furthermore, a positioning screw 69 is threaded through the side wall of the main pipe positioning ring 63, which can position and tighten the main pipe 7. The positioning screw 69 positions the main pipe 7, ensuring the accuracy of the main pipe 7 in direction (circumferential direction) and position.

[0050] Furthermore, the main pipeline positioning ring 63 has an upper and lower semi-circular structure. The two semi-circular rings are rotatably connected on one side and connected by screws on the other side, similar to a clamp structure, which facilitates the clamping and disassembly of the main pipeline 7.

[0051] Among them, such as Figure 5 As shown, the main pipe 7 has several liquid outlet holes on its side wall, and a cylindrical connecting tube 71 is installed at each outlet hole. The dripper 8 is a cylindrical structure with one end (lower end) sealed. The dripper 8 is screwed onto the inner wall of the connecting tube 71, and several drip holes 81 are opened on its side wall (the drip hole 81 is located at the bottom of the side wall of the dripper 8). A dripper protection tube 9 is screwed onto the outer wall of the connecting tube 71 to protect the dripper 8. The dripper protection tube 9 protects the dripper 8 with drip holes 81, preventing external debris (plant stems and leaves, flying catkins, etc.) from clogging the drip holes 81 and ensuring the reliability of drip irrigation. Furthermore, both the dripper protection tube 9 and the dripper 8 are screwed on, effectively ensuring convenient disassembly and assembly, and providing convenience for component maintenance.

[0052] The dripper protection tube 9 has a small annular gap with the dripper 8, and the bottom of the dripper protection tube 9 extends to the lower part of the dripper 8, being longer than the length of the dripper 8. The bottom of the dripper protection tube 9 has a dripping cylinder 91 that gradually expands from top to bottom, with a serrated lower edge. The fertilizer solution coming from the dripping hole 81 adheres to the inner wall of the dripper protection tube 9 and drips downwards. The gradually expanding dripping cylinder 91 expands the dripping area, making the dripping more even on the plant roots. The serrated lower edge of the dripping cylinder 91 reduces liquid tension, ensuring smooth dripping.

[0053] The outlet of pump 2 is connected to the upper part of premix tank 3 and the outlet of flow valve 15 via pipelines, and is equipped with a second control valve 12 and a first control valve 11 respectively; the inlet of injector pipe 4 is connected to a third control valve 13. By controlling the opening and closing of the first control valve 11, the second control valve 12, and the third control valve 13, normal drip irrigation operation can be achieved (second control valve 12 and first control valve 11 are closed, third control valve 13 and fourth control valve 14 are open), water flushing of premix tank 3 can be achieved (second control valve 12 and third control valve 13 are open, first control valve 11 is closed), and water flushing of dripper 8 can be achieved (second control valve 12, third control valve 13, and fourth control valve 14 are closed, first control valve 11 is open), ensuring that fertilizer in the drip irrigation system is completely discharged and avoiding sedimentation and blockage.

[0054] In this drip irrigation system, a small amount of clean water and the required amount of water-soluble fertilizer are first added to the premixing tank 3. The water in the premixing tank 3 is heated by a heating device (generally not exceeding 30 degrees Celsius). The first stirring device in the premixing tank 3 stirs the water and fertilizer, which can accelerate the dissolution rate of the fertilizer and ensure its thorough dissolution. The water filtered by the first filter 1 is pressurized and sprayed out by the water pump 2, and a negative pressure is generated through the ejector pipe 4 to eject the premixed water and fertilizer solution in the premixing tank 3. It is initially mixed in the ejector pipe 4 and enters the fertilizer tank 5. The second stirring device stirs it again to achieve uniform mixing of fertilizer and water, effectively avoiding the blockage of the dripper 8 by undissolved particles. The uniformly mixed water and fertilizer solution is dripped around the root system of the desired plants through the dripper 8 via the fourth control valve 14 and the flow valve 15. The main pipeline 7 is reliably supported by the main pipeline support frame 6 to ensure the reliability and accuracy of drip irrigation. This device filters water through the first filter 1 and achieves high efficiency, thoroughness and uniformity of fertilizer mixing through three-stage mixing (the heating device in the premixing tank 3 accelerates dissolution, the first stirring device stirs the premixing, the ejector tube 4 performs secondary mixing, and the second stirring device in the fertilizer tank 5 stirs the mixture), thereby improving fertilization efficiency, effectively avoiding clogging of the drippers 8, ensuring normal drip irrigation operation and greatly reducing maintenance costs.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drip irrigation device comprising a first filter (1), a water pump (2), and a fertilizer tank (5) connected sequentially by pipes, wherein a fourth control valve (14), a flow valve (15), and several drippers (8) are sequentially connected and installed at the bottom outlet of the fertilizer tank (5) via a main pipe (7), characterized in that, A water pump (2) is connected to a fertilizer tank (5) by an ejector pipe (4); a premixing tank (3) is also included, which is equipped with a heating device and a first stirring device. The bottom of the premixing tank (3) is connected to the ejector pipe (4) through an output pipe (37). The water flow from the outlet of the water pump (2) can be ejected to the fertilizer solution in the output pipe (37) through the ejector pipe (4); a second stirring device is installed in the fertilizer tank (5); the main pipeline (7) is supported and fixed by a main pipeline support frame (6) set at intervals.

2. The drip irrigation device according to claim 1, characterized in that, The premixing tank (3) includes a premixing tank shell (31) with a double-walled structure and a premixing tank cover (32) that can be detachably installed on the premixing tank shell (31). The heating device includes several electric heating devices (39) installed in the space between the premixing tank shell (31) and the space between the premixing tank shell (31) is filled with a heating liquid medium.

3. The drip irrigation device according to claim 1, characterized in that, The premix tank shell (31) is provided with several support frames (36) that connect and support its inner and outer walls.

4. The drip irrigation device according to claim 1, characterized in that, The first stirring device includes a first motor (33) positioned and installed on the upper part of the premix tank cover (32). The output end of the first motor (33) is connected to a first rotating rod (34) that can extend into the premix tank (3). The first rotating rod (34) is provided with a plurality of first stirring blades (35).

5. The drip irrigation device according to claim 1, characterized in that, The ejector tube (4) has an annular connecting channel (41) and a number of second channels (42) arranged in an annular array and connected to the connecting channel (41) at the front. The second channels (42) are connected to the inner cavity of the ejector tube (4), and the connecting channel (41) is connected to the output tube (37).

6. The drip irrigation device according to claim 5, characterized in that, The outlet end of the second channel (42) is inclined along the direction of the ejector tube (4).

7. The drip irrigation device according to claim 1, characterized in that, The inlet end of the ejector tube (4) is connected to a tapered transition tube (43).

8. The drip irrigation device according to claim 1, characterized in that, The main pipe support frame (6) includes a lower support rod (61) and an upper support rod (62). The lower end of the lower support rod (61) is connected to a main positioning pin (67), and the upper part of the upper support rod (62) is provided with a main pipe positioning ring (63) that can position the main pipe (7) in place. The upper support rod (62) and the lower support rod (61) are connected by a double-section reverse threaded connecting screw (64).

9. The drip irrigation device according to claim 1, characterized in that, The main pipe (7) has several liquid outlet holes on its side wall, and a cylindrical connecting tube (71) is installed at the liquid outlet hole position; the dripper (8) is a cylindrical structure with one end sealed, and it is screwed to the inner wall of the connecting tube (71). Several drip holes (81) are opened on the side wall of the dripper (8); a dripper protection tube (9) that can protect the dripper (8) is screwed onto the outer wall of the connecting tube (71).

10. The drip irrigation device according to claim 9, characterized in that, The outlet of the water pump (2) is connected to the upper part of the premixing tank (3) and the outlet of the flow valve (15) through pipes, and is equipped with a second control valve (12) and a first control valve (11) respectively; the inlet of the ejector pipe (4) is connected to a third control valve (13).

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