Ball valve for irrigation and preparation method thereof

Abstract

The invention relates to a ball valve for irrigation and a manufacturing method thereof, the ball valve comprises a valve body, a valve plate is arranged in the valve body in a matched mode, a self-adaptive sealing piece is arranged in a first annular groove in the valve plate, and the self-adaptive sealing piece adjusts the sealing performance of contact with the inner wall of the valve body in a self-adaptive mode according to the water pressure. The self-adaptive sealing piece is arranged in the first annular groove of the valve plate, when the water pressure in a ditch is large, the water pressure can extrude the elastic corrugated pipe of the hydraulic cavity, then a filling medium in the elastic corrugated pipe flows to the annular hydraulic cavity, a sealing ring is pushed to be locally expanded, the sealing force is increased, and leakage is prevented; the pressure in the hydraulic cavity is also low, the sealing ring keeps small deformation, moderate sealing force is provided, the self-adaptive sealing piece can automatically adjust the sealing force of the sealing ring according to the pressure of irrigation water, and the sealing performance of the ball valve is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly relates to a ball valve for irrigation and a preparation method thereof. Background Art

[0002] The ball valve belongs to one of the valves. Due to its simple structure, convenient operation, low cost and other characteristics, the ball valve has been widely used in the farmland irrigation system, and is particularly suitable for the flow regulation and cut-off control of the water distribution system in the farmland irrigation ditches.

[0003] Farmland irrigation ditches are an important part of the infrastructure for transforming farmland, mainly used for farmland irrigation and drainage to ensure the water required for the normal growth of crops. Its main function is irrigation. After drought, the ditches are used to irrigate the farmland to prevent crops from withering and dying due to drought. When using ditch irrigation, drain pipes are often arranged on the side of the ditch. A number of drain pipes are distributed in sequence along the length of the ditch and are respectively used to irrigate farmland in different areas. The water in the ditch can flow into the farmland through the drain pipes for irrigation. Valves are arranged on the drain pipes for flow regulation and cut-off control. However, it is found that when using ditch drain pipes for irrigation in farmland, the water flow at the drain pipe is often too rapid, resulting in too large an impact force on the ground, causing partial soil erosion and crop damage. Even through the valve for flow regulation, it is difficult to effectively control the impact force of the discharged water.

[0004] In addition, in the farmland irrigation network, ball valves are mainly installed on each outlet pipe. With its excellent cost performance and adaptability, the ball valve has become an indispensable key device in the modern farmland irrigation system, providing reliable technical support for agricultural water-saving irrigation. However, for the existing ball valves, most of their sealing rings are fixed on the valve body in a ring shape, and their sealing performance is relatively fixed. Moreover, with the frequent opening and closing of the valve plate, the sealing performance of the sealing ring will be further reduced. When the water pressure in the irrigation ditch is relatively large, it is easy to cause water leakage in the ditch, causing water damage to the farmland. Summary of the Invention

[0005] In view of the above problems, the present invention provides a ball valve for irrigation and a preparation method thereof. The adaptive seal can automatically adjust the sealing force of the sealing ring according to the pressure of the irrigation water, improving the sealing performance of the ball valve.

[0006] The specific technical solutions are as follows: A ball valve for irrigation, comprising a valve body, wherein a valve plate is adapted inside the valve body, a first annular groove is coaxially arranged on the edge of one end face of the valve plate close to the water inlet end, an adaptive seal is arranged in the first annular groove, and the adaptive seal adaptively adjusts the sealing performance in contact with the inner wall of the valve body according to the magnitude of the water pressure. A circular clamping plate for clamping the adaptive seal is also coaxially arranged at the port position of the annular groove close to the water inlet end, and a first sliding cavity parallel to its axial direction is further arranged inside the circular clamping plate; The adaptive seal comprises a sealing ring coaxially arranged in the first annular groove and a hydraulic cavity arranged inside the first sliding cavity. The hydraulic cavity comprises a hydraulic seat coaxially arranged with the first sliding cavity, the bottom of the hydraulic seat is connected with the bottom of the first annular groove, the other end of the hydraulic seat is coaxially provided with an elastic corrugated pipe, the elastic corrugated pipe is located inside the first sliding cavity, the other end of the elastic corrugated pipe is coaxially provided with a sealing plate, the other end of the sealing plate is coaxially provided with a first piston adapted to the first sliding cavity, an annular hydraulic cavity is coaxially arranged inside the sealing ring, the annular hydraulic cavity is communicated with the inside of the elastic corrugated pipe through a hydraulic pipeline, and the annular hydraulic cavity, the hydraulic pipeline, the hydraulic seat and the elastic corrugated pipe are communicated with each other and filled with a filling medium; Hemispherical buffer heads are symmetrically arranged on both end faces of the valve plate, and a corrugated buffer channel is further arranged in the hemispherical buffer head along the horizontal direction.

[0007] Further, the valve body is in an inverted L shape, the water outlet end of the valve body is arranged vertically downward, the valve plate is located at the horizontal section of the valve body, a first flange for connecting with a water outlet pipe is coaxially arranged on the water inlet port of the valve body, the water outlet pipe is arranged on one side wall of the irrigation ditch and the other end of the water outlet pipe is communicated with the inside of the irrigation ditch.

[0008] Further, a valve rod is vertically arranged at the axial center position of the valve plate, and a transmission mechanism for driving the valve rod to rotate around the axis is arranged on the upper end face of the horizontal section of the valve body.

[0009] Further, the thickness of the circular clamping plate is the same as the depth of the first annular groove, the circular clamping plate is connected with the bottom of the first annular groove through a plurality of hexagon socket head cap screws, and a second annular groove for clamping the sealing ring is coaxially arranged at a position close to the outer ring on the end face of the circular clamping plate far from the water inlet end.

[0010] Further, the outer ring of the sealing ring is in sealing contact with the inner wall of the valve body when the valve plate is closed, annular limiting protrusions are coaxially arranged at positions close to the inner ring on both end faces of the sealing ring, and annular limiting grooves adapted to the annular limiting protrusions are respectively arranged at the bottoms of the first annular groove and the second annular groove.

[0011] Further, a plurality of hydraulic cavities are provided, and the plurality of hydraulic cavities are arranged at equal intervals along the circumferential direction of the annular clamping plate.

[0012] Further, a plurality of annular hydraulic cavities are provided, and the plurality of annular hydraulic cavities are arranged at equal intervals along the axial direction of the sealing ring. Each annular hydraulic cavity is communicated with all the hydraulic pipelines through a plurality of hydraulic branch pipelines.

[0013] Further, the filling medium is one of hydraulic oil and inert gas.

[0014] Further, both ports of the buffer channel penetrate the outer surface of the hemispherical buffer head. A plurality of buffer channels are provided, and the plurality of buffer channels are arranged at equal intervals on the hemispherical buffer head in sequence.

[0015] A preparation method of a ball valve for irrigation includes the following steps: S1. Use CAD software to design the three-dimensional models of the ball valve for irrigation, including the valve body, the valve plate and the hemispherical buffer head structure, and use CAD software to design the three-dimensional model of the adaptive seal, including the sealing ring, the hydraulic cavity and the hydraulic pipeline structure; S2. Verify the strength, sealing performance and flow resistance performance of the design through finite element analysis and fluid dynamics simulation; S3. Select high-strength and corrosion-resistant titanium alloy, nickel-based alloy or composite material, and use selective laser melting metal 3D printing technology to manufacture the valve body, the valve plate, the hemispherical buffer head and the annular clamping plate; S4. Use gradient materials to print on the outer surfaces of the valve plate, the hemispherical buffer head and the annular clamping plate, so that the material transitions from high strength to high wear resistance; S5. Carry out numerical control turning and grinding finishing on the valve body, the valve plate, the hemispherical buffer head and the annular clamping plate formed by 3D printing to ensure the key dimensions and surface accuracy, and adopt plasma spraying and laser surface hardening technology to form wear-resistant and corrosion-resistant coatings on the inner side of the valve body and the outer surfaces of the valve plate and the hemispherical buffer head; S6. Use fluororubber or polytetrafluoroethylene high-performance elastic material to 3D print the adaptive seal, integrally form the sealing ring, the hydraulic cavity and the hydraulic pipeline structure, and embed the annular hydraulic cavity in the sealing ring; S7. After the adaptive seal is prepared, inject the liquid filling medium into the hydraulic cavity, the hydraulic pipeline and the annular hydraulic cavity through the microchannel, and seal the microchannel; S8. Install the adaptive seal on the valve plate and fix it through the annular clamping plate. Assemble the valve plate into the valve body through the valve stem, and assemble the transmission mechanism at the upper end of the valve body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1)A ball valve for irrigation and its preparation method according to the present invention. By arranging an adaptive seal in the first annular groove of the valve plate, when the water pressure in the ditch is relatively high, the water pressure will squeeze the elastic corrugated pipe of the hydraulic cavity, so that the filling medium in the elastic corrugated pipe flows into the annular hydraulic cavity, pushing the sealing ring to expand locally, increasing the sealing force and preventing leakage. When the water pressure in the ditch is relatively low, the pressure in the hydraulic cavity is also relatively low, and the sealing ring maintains a small deformation amount, providing a moderate sealing force. The adaptive seal can automatically adjust the sealing force of the sealing ring according to the pressure of the irrigation water, improving the sealing performance of the ball valve.

[0017] (2)A ball valve for irrigation and its preparation method according to the present invention. By arranging hemispherical buffer heads at both end faces of the valve plate respectively, and arranging a number of corrugated buffer channels horizontally in the hemispherical buffer heads, the impact force when the irrigation water flows out in the ditch can be slowed down, reducing the impact on the farmland.

[0018] (3)A ball valve for irrigation and its preparation method according to the present invention. By using selective laser melting metal 3D printing technology to manufacture the valve body, valve plate, hemispherical buffer head and annular splint, the material waste in traditional processing is reduced, and the design of complex buffer channels is realized; by printing gradient materials on the outer surfaces of the valve plate, hemispherical buffer head and annular splint, the material transitions from high strength to high wear resistance, improving the service life of the valve plate, hemispherical buffer head and annular splint; by using plasma spraying and laser surface hardening technology, wear-resistant and corrosion-resistant coatings are formed on the inner side of the valve body and the outer surfaces of the valve plate and hemispherical buffer head, further improving the service life. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the valve body of the present invention.

[0020] Figure 2 It is of the present invention Figure 1 Partial enlarged schematic diagram at A of.

[0021] Figure 3 It is a schematic diagram of the distribution of the hydraulic cavity of the present invention.

[0022] Figure 4 It is a schematic diagram of the present invention installed on the water outlet pipe.

[0023] Figure 5 It is a schematic structural diagram of the adaptive buffer component of the present invention.

[0024] Figure 6 It is of the present invention Figure 5 Partial enlarged schematic diagram at B of.

[0025] Figure 7 It is of the present invention Figure 5Partial enlarged schematic diagram at C.

[0026] Figure 8 It is a schematic diagram of the flow dividing plate structure of the present invention.

[0027] Figure 9 It is a schematic diagram of the adaptive opening and closing component structure of the present invention.

[0028] Figure 10 It is a schematic diagram of the guide plate structure of the present invention.

[0029] Figure 11 It is a schematic diagram of the auxiliary opening component structure of the present invention.

[0030] In the figure: 1, valve body; 2, valve plate; 3, first annular groove; 4, adaptive seal; 41, sealing ring; 42, hydraulic cavity; 421, hydraulic seat; 422, elastic corrugated pipe; 423, sealing plate; 43, annular hydraulic cavity; 44, hydraulic pipeline; 45, annular limit protrusion; 46, annular limit groove; 5, annular clamping plate; 6, first sliding cavity; 7, first piston; 8, second annular groove; 9, hemispherical buffer head; 10, buffer channel; 11, first flange; 12, water outlet pipe; 13, irrigation ditch; 14, transmission mechanism; 15, adaptive buffer component; 16, buffer box; 17, flow dividing plate; 18, first flow dividing hole; 19, second flow dividing hole; 20, third flow dividing hole; 21, first current limiting plate; 22, second current limiting plate; 23, adaptive opening and closing component; 231, double-threaded screw rod; 232, first thread; 233, second thread; 234, first ball nut slider; 235, second ball nut slider; 236, partition plate; 237, annular plate; 238, first return spring; 239, first connecting rod; 2310, second connecting rod; 2311, first bearing seat; 2312, third connecting rod; 2313, second bearing seat; 2314, guide rod; 24, buffer layer; 25, guide plate; 26, guide groove; 27, auxiliary opening component; 271, auxiliary seat; 272, second sliding cavity; 273, second piston; 274, ejector rod; 275, second return spring. Specific embodiments

[0031] The following further details the present application in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0032] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will detail the present application with reference to the drawings and in conjunction with the embodiments.

[0033] Embodiment 1 The present invention provides a ball valve for irrigation, referring to Figures 1-4 , which includes a valve body 1. The valve body 1 is in an inverted L shape, and the water outlet end of the valve body 1 is arranged vertically downward. A valve plate 2 is fitted inside the valve body 1. The valve plate 2 is located at the horizontal section of the valve body 1. A first flange 11 for connecting with a water outlet pipe 12 is coaxially arranged on the water inlet port of the valve body 1. The water outlet pipe 12 is arranged on one side wall of an irrigation ditch 13 and the other end thereof communicates with the inside of the irrigation ditch 13. A valve rod is vertically arranged at the axial center position of the valve plate 2. A transmission mechanism 14 for driving the valve rod to rotate around an axis is arranged on the upper end surface of the horizontal section of the valve body 1. A first annular groove 3 is coaxially arranged on the edge of one end surface of the valve plate 2 close to the water inlet end. An adaptive seal 4 is arranged in the first annular groove 3. The adaptive seal 4 adaptively adjusts the sealing performance in contact with the inner wall of the valve body 1 according to the magnitude of the water pressure. A ring splint 5 for clamping the adaptive seal 4 is also coaxially arranged at the port position of the annular groove close to the water inlet end. A first sliding cavity 6 parallel to its axial direction is further arranged inside the ring splint 5; the thickness of the ring splint 5 is the same as the depth of the first annular groove 3. The ring splint 5 is connected to the bottom of the first annular groove 3 through a plurality of socket head cap screws. A second annular groove 8 for clamping the sealing ring 41 is coaxially arranged at a position close to the outer circle on one end surface of the ring splint 5 far from the water inlet end; a third groove for allowing a hydraulic pipeline 44 to pass through is also arranged on one end surface of the ring splint 5 far from the water inlet end.

[0034] Further, as a specific implementation manner, referring to Figure 2 and Figure 3, the adaptive seal 4 includes a sealing ring 41 coaxially arranged in the first annular groove 3 and a hydraulic cavity 42 arranged inside the first sliding cavity 6. The hydraulic cavity 42 includes a hydraulic seat 421 coaxially arranged with the first sliding cavity 6. The bottom of the hydraulic seat 421 is connected to the bottom of the first annular groove 3. The other end of the hydraulic seat 421 is coaxially provided with an elastic bellows 422. The elastic bellows 422 is located inside the first sliding cavity 6. The other end of the elastic bellows 422 is coaxially provided with a sealing plate 423. The other end of the sealing plate 423 is coaxially provided with a first piston 7 adapted to the first sliding cavity 6. An annular hydraulic cavity 43 is coaxially arranged inside the sealing ring 41. The annular hydraulic cavity 43 is communicated with the inside of the elastic bellows 422 through a hydraulic pipeline 44. The annular hydraulic cavity 43, the hydraulic pipeline 44, the hydraulic seat 421, and the elastic bellows 422 are communicated with each other and filled with a filling medium. The filling medium is one of hydraulic oil and inert gas. Low-pressure working condition: When the pressure of the irrigation water in the ditch is low, the pressure in the elastic bellows 422 is also low, and the sealing ring 41 maintains a small deformation amount, providing a moderate sealing force; High-pressure working condition: When the pressure of the irrigation water in the ditch becomes high, the pressure in the elastic bellows 422 increases accordingly, pushing the sealing ring 41 to expand locally, increasing the sealing force and preventing leakage. The sealing ring 41 can automatically adjust the sealing force according to the pressure of the irrigation water in the ditch, adapting to various working conditions; Since the sealing ring 41 can dynamically adjust the sealing force, local wear is reduced, and the service life is extended.

[0035] Reference Figure 2 , hemispherical buffer heads 9 are symmetrically arranged on both end faces of the valve plate 2. A corrugated buffer channel 10 is also arranged horizontally inside the hemispherical buffer head 9; Both ends of the buffer channel 10 penetrate the outer surface of the hemispherical buffer head 9. A plurality of the buffer channels 10 are provided, and the plurality of buffer channels 10 are arranged on the hemispherical buffer head 9 at equal intervals in sequence. By respectively arranging hemispherical buffer heads 9 on both end faces of the valve plate 2 and arranging a plurality of corrugated buffer channels 10 horizontally inside the hemispherical buffer heads 9, the impact force when the irrigation water in the ditch flows out can be slowed down, and the impact on the farmland can be reduced.

[0036] Further, as a specific implementation manner, reference Figure 2 , the outer ring of the sealing ring 41 is in sealing contact with the inner wall of the valve body 1 when the valve plate 2 is closed. Annular limiting protrusions 45 are coaxially arranged at positions close to the inner ring on both end faces of the sealing ring 41. Annular limiting grooves 46 adapted to the annular limiting protrusions 45 are respectively arranged at the bottoms of the first annular groove 3 and the second annular groove 8. Improve the clamping stability of the annular clamping plate 5 and the valve plate 2 on the sealing ring 41.

[0037] Further, as a specific implementation manner, reference Figure 3, a plurality of the hydraulic cavities 42 are provided, and the plurality of the hydraulic cavities 42 are arranged at equal intervals along the circumferential direction of the annular clamping plate 5. The annular hydraulic cavity 43 is respectively communicated with each hydraulic cavity 42 through a hydraulic pipeline 44 to ensure uniform pressure distribution.

[0038] Further, as a specific embodiment, refer to Figure 2 , a plurality of the annular hydraulic cavities 43 are provided, and the plurality of the annular hydraulic cavities 43 are arranged at equal intervals along the axial direction of the sealing ring 41. Each annular hydraulic cavity 43 is communicated with all the hydraulic pipelines 44 through a plurality of hydraulic branch pipelines. A plurality of annular hydraulic cavities 43 are designed inside the sealing ring 41, and the annular hydraulic cavities 43 are communicated with each other through hydraulic branch pipelines and hydraulic pipelines 44 to ensure uniform pressure distribution.

[0039] Embodiment 2 On the basis of Embodiment 1, the present invention also discloses a preparation method of a ball valve for irrigation, including the following steps: S1, using CAD software to design a three-dimensional model of the ball valve for irrigation, including the structures of the valve body 1, the valve plate 2, and the hemispherical buffer head 9, optimizing the structures of the valve body 1, the valve plate 2, and the hemispherical buffer head 9, and using CAD software to design a three-dimensional model of the adaptive seal 4, including the structures of the sealing ring 41, the hydraulic cavity 42, and the hydraulic pipeline 44; S2, verifying the designed strength, sealing performance, and flow resistance performance through finite element analysis (FEA) and computational fluid dynamics (CFD) simulation, and optimizing the design of key parts; S3, selecting high-strength and corrosion-resistant titanium alloy, nickel-based alloy, or composite material, and using selective laser melting (SLM) metal 3D printing technology to manufacture the valve body 1, the valve plate 2, the hemispherical buffer head 9, and the annular clamping plate 5, reducing material waste in traditional processing, and realizing the design of the complex buffer channel 10; S4, using gradient materials to print on the outer surfaces of the valve plate 2, the hemispherical buffer head 9, and the annular clamping plate 5, so that the material transitions from high strength to high wear resistance, and improving the service lives of the valve plate 2, the hemispherical buffer head 9, and the annular clamping plate 5; S5, performing numerical control turning and grinding finishing on the valve body 1, the valve plate 2, the hemispherical buffer head 9, and the annular clamping plate 5 formed by 3D printing to ensure key dimensions and surface accuracy, and adopting plasma spraying and laser surface hardening technologies to form wear-resistant and corrosion-resistant coatings on the inner side of the valve body 1 and the outer surfaces of the valve plate 2 and the hemispherical buffer head 9; S6. Use fluororubber or polytetrafluoroethylene high-performance elastic materials to 3D print the adaptive seal 4, ensuring a tight fit between the outer ring of the seal ring 41 and the inner wall of the valve body 1. Integrate the seal ring 41, the hydraulic cavity 42, and the hydraulic pipeline 44 into one structure, and embed the annular hydraulic cavity 43 in the seal ring 41, enabling the seal ring 41 to automatically adjust the sealing force according to the medium pressure and improving the sealing performance. S7. After the adaptive seal 4 is prepared, inject the liquid filling medium into the hydraulic cavity 42, the hydraulic pipeline 44, and the annular hydraulic cavity 43 through the microchannel, and seal the microchannel. S8. Install the adaptive seal 4 on the valve plate 2 and fix it with the annular splint 5. Assemble the valve plate 2 into the valve body 1 through the valve stem, and assemble the transmission mechanism 14 at the upper end of the valve body 1.

[0040] In step S6, design multiple annular hydraulic cavities 43 inside the seal ring 41, and connect the annular hydraulic cavities 43 through hydraulic branch pipelines and the hydraulic pipeline 44 to ensure uniform pressure distribution.

[0041] In step S6, it also includes step S61. Use a high-precision 3D printer (such as stereolithography or inkjet printing technology) to ensure the dimensional accuracy of the seal ring 41, the hydraulic seat 421, the elastic corrugated pipe 422, and the annular hydraulic cavity 43, the hydraulic branch pipeline, and the hydraulic pipeline 44.

[0042] Embodiment 3 According to the working principle of Embodiment 1, the irrigation water in the ditch flows into the water outlet end of the valve body 1 after being slowed down by the buffer channel 10 in the hemispherical buffer head 9. The valve body 1 is in an inverted L shape, and the water outlet end of the valve body 1 is arranged vertically downward. The inverted L shape of the valve body 1 can further slow down the impact force of the irrigation water flowing out on the farmland. However, it is found in practice that although the slowdown through the buffer channel 10 and the valve body 1 can slow down the impact force of the irrigation water to a certain extent, when the water pressure is large, the slowdown degree is limited, and there is still a problem of relatively large impact on the farmland.

[0043] The present invention provides a ball valve for irrigation. On the basis of Embodiment 1, refer to Figure 5 、 Figure 6 and Figure 7, an adaptive buffer component 15 is further provided at the water outlet end of the valve body 1. The adaptive buffer component 15 includes a buffer box body 16. The middle of the upper end surface of the buffer box body 16 is communicated with the water outlet end of the valve body 1. A shunt plate 17 is horizontally arranged inside the buffer box body 16. A first shunt hole 18 penetrating up and down is arranged in the middle of the shunt plate 17. A second shunt hole 19 penetrating up and down is arranged at one end of the shunt plate 17 in the length direction. A third shunt hole 20 penetrating up and down is arranged at the other end of the shunt plate 17 in the length direction. A first current-limiting plate 21 for blocking is arranged in the second shunt hole 19. A second current-limiting plate 22 for blocking is arranged in the third shunt hole 20. The vertical height of the first current-limiting plate 21 is less than the vertical height of the second current-limiting plate 22. An adaptive opening and closing component 23 for controlling the longitudinal movement of the first current-limiting plate 21 and the second current-limiting plate 22 according to the magnitude of the water impact force is also vertically arranged upward in the middle of the shunt plate 17. A buffer layer 24 is further arranged below the shunt plate 17 inside the buffer box body 16. A guide plate 25 is arranged at the lower end inside the buffer box body 16. An outlet is arranged on one side surface of the buffer box body 16 away from the irrigation ditch 13. The buffer layer 24 is a geotextile layer and is arranged in several layers vertically. When the impact force of the irrigation water flowing out of the water outlet end of the valve body 1 is small, the adaptive opening and closing component 23 controls the first current-limiting plate 21 to block the second shunt hole 19 and controls the second current-limiting plate 22 to block the third shunt hole 20. At this time, the irrigation water only flows out through the first shunt hole 18 and falls into the buffer layer 24, and after being buffered by the buffer layer 24, it falls onto the guide plate 25 and finally flows out, which can ensure the outflow efficiency of a small amount of water after passing through the shunt plate 17 and the buffer layer 24. When the impact force of the irrigation water flowing out of the water outlet end of the valve body 1 is large, the adaptive opening and closing component 23 controls the opening of the second shunt hole 19 or the opening of both the second shunt hole 19 and the third shunt hole 20. At this time, the irrigation water can flow out through the first shunt hole 18 and the second shunt hole 19 and fall into the buffer layer 24 or flow out through the first shunt hole 18, the second shunt hole 19, and the third shunt hole 20 and fall into the buffer layer 24. After being buffered by the buffer layer 24, it falls onto the guide plate 25 and finally flows out, which can ensure the outflow efficiency of a large amount of water after passing through the shunt plate 17 and the buffer layer 24.

[0044] Further, as a specific implementation manner, referring to Figure 5 and Figure 8 , the shunt plate 17 divides the buffer box body 16 into upper and lower two chambers. The length directions of the first shunt hole 18, the second shunt hole 19, and the third shunt hole 20 are all arranged along the width direction of the shunt plate 17. A plurality of the first shunt holes 18, the second shunt holes 19, and the third shunt holes 20 are arranged. The first shunt holes 18 are arranged obliquely at a certain angle, and the second shunt holes 19 and the third shunt holes 20 are arranged vertically. The first shunt holes 18 being arranged obliquely at a certain angle can further reduce the impact force of the irrigation water flowing towards the buffer layer 24.

[0045] Further, as a specific implementation manner, referring to Figure 5 and Figure 9 , the adaptive opening and closing assembly 23 includes a double-threaded lead screw 231 arranged vertically. The upper and lower ends of the double-threaded lead screw 231 are respectively provided with a first thread 232 and a second thread 233. The pitch of the first thread 232 is greater than that of the second thread 233 and their thread directions are opposite. The first thread 232 is located inside the water outlet end of the valve body 1. A first ball nut slider 234 is fitted on the first thread 232, and a second ball nut slider 235 is fitted on the second thread 233. A partition plate 236 is arranged at the position between the first thread 232 and the second thread 233 on the double-threaded lead screw 231 through a bearing. A circular plate 237 is horizontally arranged on the outer side of the first ball nut slider 234. A first return spring 238 is further arranged between the partition plate 236 and the first ball nut slider 234. One end of the second ball nut slider 235 close to the second diversion hole 19 is horizontally provided with a first connecting rod 239, and the other end of the first connecting rod 239 is connected to the upper ends of a plurality of the first current-limiting plates 21. One end of the second ball nut slider 235 close to the third diversion hole 20 is horizontally provided with a second connecting rod 2310, and the other end of the second connecting rod 2310 is connected to the upper ends of a plurality of the second current-limiting plates 22. The upper end of the double-threaded lead screw 231 is provided with a first bearing seat 2311, and the outer side of the first bearing seat 2311 is connected to the inner wall of the water outlet end of the valve body 1 through a plurality of third connecting rods 2312. The lower end of the double-threaded lead screw 231 is provided with a second bearing seat 2313, and the second bearing seat 2313 is connected to the middle of the diversion plate 17. A guide rod 2314 is further arranged between the first bearing seat 2311 and the second bearing seat 2313. The first ball nut slider 234 and the second ball nut slider 235 are respectively provided with guide holes adapted to the guide rod 2314. The outer diameter of the circular plate 237 is smaller than the inner diameter of the water outlet end of the valve body 1. When the irrigation water flows out from the water outlet end of the valve body 1, it can impact the circular plate 237, so that the circular plate 237 moves downward. The downward movement stroke of the circular plate 237 is positively correlated with the magnitude of the water impact force. The downward movement of the circular plate 237 can drive the upward movement of the second ball nut slider 235, and then drive the upward movement of the first connecting rod 239 and the second connecting rod 2310, and then drive the upward movement of the first current-limiting plate 21 and the second current-limiting plate 22. When the first current-limiting plate 21 moves out of the second diversion hole 19, the blocking of the second diversion hole 19 is released. When the second current-limiting plate 22 moves out of the third diversion hole 20, the blocking of the third diversion hole 20 is released. Thus, the opening or closing of the second diversion hole 19 and the third diversion hole 20 is controlled according to the amount of the irrigation water, and while buffering the irrigation water, the outflow efficiency of the irrigation water is ensured.

[0046] Further, as a specific implementation manner, with reference to Figure 5 and Figure 10 , the width direction of the flow guide plate 25 is inclined at a certain angle, and the end close to the water outlet of the buffer box body 16 is the lower end. A plurality of flow guide grooves 26 are arranged on the upper end surface of the flow guide plate 25. The length direction of the flow guide grooves 26 is arranged along the width direction of the flow guide plate 25, and the plurality of flow guide grooves 26 are arranged at equal intervals in sequence along the length direction of the flow guide plate 25.

[0047] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0048] The above-described embodiments only express the implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A ball valve for irrigation, characterized in that, It includes a valve body (1), a valve plate (2) is fitted inside the valve body (1). On the edge of one end face of the valve plate (2) close to the water inlet end, a first annular groove (3) is coaxially arranged. An adaptive seal (4) is arranged in the first annular groove (3). The adaptive seal (4) adaptively adjusts the sealing performance in contact with the inner wall of the valve body (1) according to the magnitude of the water pressure. At the port position of the first annular groove (3) close to the water inlet end, an annular clamping plate (5) for clamping the adaptive seal (4) is also coaxially arranged. A first sliding cavity (6) parallel to its axis is also arranged inside the annular clamping plate (5); The adaptive seal (4) includes a sealing ring (41) coaxially arranged in the first annular groove (3) and a hydraulic cavity (42) arranged inside the first sliding cavity (6). The hydraulic cavity (42) includes a hydraulic seat (421) coaxially arranged with the first sliding cavity (6). The bottom of the hydraulic seat (421) is connected to the bottom of the first annular groove (3). The other end of the hydraulic seat (421) is coaxially provided with an elastic corrugated pipe (422). The elastic corrugated pipe (422) is located inside the first sliding cavity (6). The other end of the elastic corrugated pipe (422) is coaxially provided with a sealing plate (423). The other end of the sealing plate (423) is coaxially provided with a first piston (7) adapted to the first sliding cavity (6). An annular hydraulic cavity (43) is coaxially arranged inside the sealing ring (41). The annular hydraulic cavity (43) is communicated with the inside of the elastic corrugated pipe (422) through a hydraulic pipe (44). The annular hydraulic cavity (43), the hydraulic pipe (44), the hydraulic seat (421), and the elastic corrugated pipe (422) are communicated with each other and filled with a filling medium; Hemispherical buffer heads (9) are symmetrically arranged on both end faces of the valve plate (2). A corrugated buffer channel (10) is also arranged horizontally inside the hemispherical buffer head (9).

2. The ball valve for irrigation according to claim 1, characterized in that, The valve body (1) is in an inverted L shape. The water outlet end of the valve body (1) is arranged vertically downward. The valve plate (2) is located at the horizontal section position of the valve body (1). A first flange (11) for connecting with a water outlet pipe (12) is coaxially arranged on the water inlet port of the valve body (1). The water outlet pipe (12) is arranged on one side wall of an irrigation ditch (13) and its other end is communicated with the inside of the irrigation ditch (13).

3. The ball valve for irrigation according to claim 1, characterized in that, A valve rod is vertically arranged at the axial center position of the valve plate (2). A transmission mechanism for driving the valve rod to rotate around the axis is arranged on the upper end face of the horizontal section of the valve body (1).

4. The ball valve for irrigation according to claim 1, characterized in that, The thickness of the annular clamping plate (5) is the same as the depth of the first annular groove (3). The annular clamping plate (5) is connected to the bottom of the first annular groove (3) through a plurality of socket head cap screws. A second annular groove (8) for clamping the sealing ring (41) is coaxially arranged at a position close to its outer ring on the end face of the annular clamping plate (5) away from the water inlet end.

5. The ball valve for irrigation according to claim 4, characterized in that, The outer ring of the sealing ring (41) is in sealing contact with the inner wall of the valve body (1) when the valve plate (2) is closed. At positions near the inner ring on both end faces of the sealing ring (41), annular limiting protrusions (45) are coaxially arranged respectively. Annular limiting grooves (46) adapted to the annular limiting protrusions (45) are arranged at the bottoms of the first annular groove (3) and the second annular groove (8) respectively.

6. The ball valve for irrigation according to claim 1, wherein A plurality of the hydraulic cavities (42) are provided, and the plurality of the hydraulic cavities (42) are arranged at equal intervals along the circumferential direction of the annular clamping plate (5).

7. The ball valve for irrigation according to claim 6, wherein, A plurality of the annular hydraulic cavities (43) are provided, and the plurality of the annular hydraulic cavities (43) are arranged at equal intervals along the axial direction of the sealing ring (41). Each of the annular hydraulic cavities (43) is communicated with all the hydraulic pipelines (44) through a plurality of hydraulic branch pipelines.

8. The ball valve for irrigation according to claim 1, characterized in that, The filling medium is one of hydraulic oil and inert gas.

9. The ball valve for irrigation according to claim 1, characterized in that, Both ports of the buffer channel (10) penetrate through the outer surface of the hemispherical buffer head (9). A plurality of the buffer channels (10) are provided, and the plurality of the buffer channels (10) are arranged at equal intervals on the hemispherical buffer head (9) in sequence.

10. The preparation method of a ball valve for irrigation according to any one of claims 1-9, characterized in that, Including the following steps: S1. Use CAD software to design the three-dimensional models of the irrigation ball valve, including the valve body, valve plate and hemispherical buffer head structure, and use CAD software to design the three-dimensional model of the adaptive seal, including the sealing ring, hydraulic cavity and hydraulic pipeline structure; S2. Verify the strength, sealing performance and flow resistance performance of the design through finite element analysis and fluid dynamics simulation; S3. Select high-strength and corrosion-resistant titanium alloy, nickel-based alloy or composite material, and use selective laser melting metal 3D printing technology to manufacture the valve body, valve plate, hemispherical buffer head and annular clamping plate; S4. Use gradient materials to print on the outer surfaces of the valve plate, hemispherical buffer head and annular clamping plate to make the material transition from high strength to high wear resistance; S5. Carry out numerical control turning and grinding finishing on the 3D printed valve body, valve plate, hemispherical buffer head and annular clamping plate to ensure the key dimensions and surface accuracy, and adopt plasma spraying and laser surface hardening technology to form wear-resistant and corrosion-resistant coatings on the inner side of the valve body and the outer surfaces of the valve plate and hemispherical buffer head; S6. Use fluororubber or polytetrafluoroethylene high-performance elastic material to 3D print the adaptive seal, integrally form the sealing ring, hydraulic cavity and hydraulic pipeline structure, and embed the annular hydraulic cavity in the sealing ring; S7. After the adaptive seal is prepared, inject the liquid filling medium into the hydraulic cavity, hydraulic pipeline and annular hydraulic cavity through the microchannel, and seal the microchannel; S8. Install the adaptive seal on the valve plate and fix it through the annular clamping plate, assemble the valve plate into the valve body through the valve stem, and assemble the transmission mechanism at the upper end of the valve body.

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