Irrigation drip stoppers and irrigation systems

Abstract

The present invention provides an irrigation anti-drip device and an irrigation system, and relates to the technical field of anti-drip in farmland irrigation. The irrigation anti-drip device includes an elastic seal, a sealing support, and a drive assembly. The elastic seal is sleeved on the sealing support. The sealing support includes at least two sub-sealing supports that can move relative to each other. At least two of the sub-sealing supports can achieve sealing together with the elastic seal when the elastic seal is in a natural state. The drive assembly is transmission-connected to at least one of the sub-sealing supports, and the drive assembly is used to drive the sub-sealing supports to open each other. This solution solves the technical problem that the stored water in the pipe network will flow out along the dripper, and also achieves the technical effect of actively discharging the stored water in the pipe network from the space between the sub-sealing supports, thereby avoiding the freezing of the stored water and damaging the irrigation pipe network and the device.

Description

Technical Field

[0001] The invention relates to the technical field of anti-drip for farmland irrigation, and in particular to an irrigation anti-drip device and an irrigation system. Background Art

[0002] Water-saving irrigation technologies mainly include sprinkler irrigation, micro-sprinkler irrigation, drip irrigation, etc.

[0003] For the suspended sprinkler heads (i.e., the water supply pipes are above the sprinkler heads) in sprinkler and micro-sprinkler irrigation technologies, such as the center pivot sprinkler used in field grain crops and cotton planting, and the inverted micro-sprinkler system used in greenhouse seedlings, vegetables, and flower cultivation, the following problems may exist in actual use: 1. After each irrigation, the stored water in the main pipe network (main pipe, branch pipe) will move downward along the sprinkler head in the form of water droplets, causing the crops below the sprinkler head to obtain more water and fertilizer, and will also damage leafy vegetables and flowers, causing economic losses; 2. When the irrigation system is started again, the main pipe network needs to be filled first. The sprinkler heads close to the water pump will work first, and the sprinkler heads far from the water pump will work later, which will cause uneven water spraying and fertilization; 3. When the system is just started, the pipe network pressure is small, and the water moves downward in the form of water droplets, which will also damage leafy vegetables and flowers.

[0004] The same problem also exists for drip irrigation technology: after each irrigation, the water in the pipe network will flow out along the dripper; when the irrigation system is started again, the main pipe network needs to be filled first, but the pressure at the water inlet end of the pipe network is high and the pressure at the end of the pipe network is low. There is a problem that the capillary tubes close to the water pump have been dripping for a long time, while the capillary tubes far from the water pump have just started to drip. For plots with large elevation differences, this phenomenon is more obvious, significantly reducing the uniformity of the drip irrigation system, and the effect of saving water and fertilizer is not ideal, which cannot meet the extremely high requirements of irrigation uniformity for emerging cultivation technologies such as hydroponic drip irrigation or matrix drip irrigation.

[0005] CN00247715 (published on June 27, 2001) discloses a micro-irrigation anti-drip valve. The inventor designed the "water outlet 6" to be higher than the "water outlet channel 7" to prevent the water in the pipe network from flowing out along the nozzle when irrigation stops. In this solution, whether the water in the pipe network flows out and how much water flows out depends on the installation position of the valve relative to the nozzle and whether the valve is installed horizontally, which has great limitations when used in actual projects. Summary of the invention

[0006] The object of the present invention is to provide an irrigation anti-drip device and an irrigation system to alleviate the technical problem in the prior art that the water stored in the pipe network will flow out along the dripper.

[0007] In a first aspect, the present invention provides an irrigation anti-drip device, comprising an elastic seal, a sealing support and a driving assembly, wherein the elastic seal is sleeved on the sealing support, the sealing support comprises at least two sub-sealing supports capable of relative movement, at least two of the sub-sealing supports being capable of sealing together with the elastic seal when the elastic seal is in a natural state, the driving assembly being transmission-connected to at least one of the sub-sealing supports, and the driving assembly being used to drive the sub-sealing supports to open each other.

[0008] The irrigation anti-drip device provided by the present invention is transmission-connected to at least one sub-sealing support member through a driving assembly, and can open the space between at least two sub-sealing supports to release the seal formed by the sealing support member and the elastic sealing member, thereby actively discharging the stored water in the pipe network from the space between the sub-sealing supports. The present invention can not only discharge the stored water in the irrigation pipe network and the device without dismantling the device before the temperature reaches the freezing point in winter, but also prevent the stored water from freezing and heaving and damaging the system. In addition, when the pressure in the pipe network is low or there is no pressure, when the driving assembly is not actively driven, the sealing support member and the elastic sealing member can seal the water outlet channel, thereby preventing the stored water in the irrigation pipe network from leaking out of the sprinkler or dripper uncontrollably before the seal is actively released.

[0009] In an optional embodiment, it also includes a shell, the elastic seal and the sealing support are located in the shell, the drive assembly includes a force-applying member and a force transmission portion that can be connected to the force-applying member, the force-applying member can protrude from the shell, the force transmission portion is transmission-connected to at least one of the sub-sealing supports, the force-applying member passes through the driving through hole of the shell, and the force-applying member and the shell are arranged to slide relative to each other.

[0010] In an optional embodiment, the force transmission portion is fixedly connected to the sub-seal support member.

[0011] In an optional embodiment, the force-applying member includes a control end and a connecting portion, the control end is located on the outside of the shell, the connecting portion is fixedly connected to the control end, and when the control end is pressed toward the shell, the connecting portion can protrude from the shell toward the inside of the shell and contact the force transmission portion.

[0012] In an optional embodiment, it also includes a support member, which is connected to the sealing support member, and the support member includes at least two sub-support members, at least one of which is a movable sub-support member, and the movable sub-support member is connected to at least one sub-sealing support member that is transmission-connected to the drive assembly, and the movable sub-support member can move relative to at least one sub-sealing support member that is not transmission-connected to the drive assembly.

[0013] In an optional embodiment, the movable sub-support member is an elastic sub-support member, and the direction of elastic deformation of the elastic sub-support member is a direction that causes the sub-sealing support member to open and close relatively.

[0014] In an optional embodiment, the sealing support is formed with a protrusion in the radial direction of the elastic sealing member, and the outer diameter of the protrusion is larger than the inner diameter of the portion between the elastic sealing member and the sealing support in a spontaneous state.

[0015] In an optional embodiment, a portion of the middle portion of the shell located radially outward of the elastic seal is provided with an exhaust hole penetrating the shell.

[0016] In an optional embodiment, a support mounting body is further included, at least a portion of the sub-seal support member is relatively movable with the support mounting body, and the shell directly or indirectly applies a force to the elastic seal member toward the support mounting body.

[0017] In a second aspect, the present invention provides an irrigation system, comprising the irrigation anti-drip device described in any one of the above items.

[0018] Since the irrigation system provided in the present aspect includes any of the above-mentioned irrigation anti-drip devices, it has the technical effects of any of the above-mentioned irrigation anti-drip devices, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A three-dimensional diagram of an irrigation anti-drip device provided in Embodiment 1 of the present invention;

[0021] Figure 2 It is a three-dimensional diagram of the irrigation anti-drip device of Example 1 with the gland, housing and elastic sealing member omitted;

[0022] Figure 3 It is a cross-sectional view of the combined part of the support installation body, the support member, the support sealing member and the force applying portion in the first embodiment;

[0023] Figure 4 is a cross-sectional view of the elastic sealing member in the first embodiment;

[0024] Figure 5 It is a left side view of the gland in the first embodiment;

[0025] Figure 6 is a cross-sectional view of the gland in Embodiment 1;

[0026] Figure 7 is a cross-sectional view of the housing in the first embodiment;

[0027] Figure 8 is a schematic diagram of a force-applying member in Embodiment 1;

[0028] Fig. 9 It is a schematic diagram of the irrigation anti-drip device of Example 1 when the elastic sealing member is not expanded by the water pressure and the driving assembly;

[0029] Fig.10 It is a schematic diagram of the irrigation anti-drip device of Example 1 when the elastic sealing member is expanded by the upstream water pressure;

[0030] Fig.11 This is a schematic diagram of the irrigation anti-drip device of Example 1 when the elastic sealing member is expanded by the driving assembly.

[0031] Icons: 1-supporting mounting body; 11-water inlet of mounting body; 12-mounting body channel; 13-water outlet of mounting body; 14-square boss portion; 15-conical boss portion; 161-movable sub-support member; 162-fixed sub-support member; 171-first sub-seal support member; 172-second sub-seal support member; 181-L-shaped rod; 182-contact head; 19-external threaded portion at the end of the mounting body; 110-external threaded portion in the middle of the mounting body; 111-wrench bayonet; 2-elastic sealing member; 21-water inlet end of the sealing member; 22-first straight cylindrical portion; 23-conical cylindrical portion; 2 4-second straight cylindrical portion; 25-water outlet end of the seal; 26-annular convex ridge portion; 3-pressure cover; 31-square groove portion; 32-pressure cover through hole; 4-shell; 41-shell inlet end; 42-step hole portion; 43-shell cylindrical middle portion; 44-conical transition section; 45-shell outlet cylindrical portion; 46-shell outlet end; 47-exhaust hole; 48-annular inner flange; 49-driving through hole; 410-first internal threaded portion; 411-second internal threaded portion; 412-reinforcement rib plate; 5-force member; 51-limiting end; 52-connecting portion; 53-control end. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] Embodiment 1:

[0040] like Figures 1 to 11As shown, this embodiment provides an irrigation anti-drip device, including an elastic seal 2, a sealing support and a driving assembly. The elastic seal 2 is sleeved on the sealing support. In this embodiment, the sealing support includes two sub-sealing supports that can move relative to each other, a first sub-sealing support 171 and a second sub-sealing support 172, and the two sub-sealing supports are divided by a plane passing through a minor axis. The two sub-sealing supports can achieve sealing together with the elastic seal 2 when the elastic seal 2 is in a natural state. The driving assembly is connected to the first sub-sealing support 171 in a transmission manner, and the driving assembly is used to drive the sub-sealing supports to open each other. Among them, the above-mentioned natural state refers to a state in which the sub-sealing support is not driven to open by an external force, and the elastic seal 2 is not expanded by water pressure, but the elastic seal 2 has been subjected to the force of the sub-sealing support supporting outward. When the sub-sealing supports are gathered together under the pressure of the elastic seal 2, the overall shape of the sealing support can be an ellipsoid with the minor axis as the symmetry axis.

[0041] The irrigation anti-drip device provided by the present invention is transmission-connected to a sub-sealing support member through a driving component, and can open the space between the two sub-sealing supports to release the seal formed by the sealing support member and the elastic sealing member 2, thereby actively discharging the stored water in the pipe network from the space between the sub-sealing supports. Not only can the stored water in the irrigation pipe network and the device be discharged before the temperature reaches the freezing point in winter without dismantling the device, thereby preventing the stored water from freezing and swelling and damaging the irrigation system; when the pressure in the irrigation pipe network is low or there is no pressure, the sealing support member and the elastic sealing member 2 can be used to seal the water outlet channel without actively driving the driving component, thereby preventing the stored water in the pipe network from leaking out of the sprinkler or dripper uncontrollably before the seal is actively released.

[0042] In an optional embodiment, it also includes a shell 4, the elastic seal 2 and the sealing support are located in the shell 4, the driving assembly includes a force member 5 and a force transmission part that can be connected to the force member 5, the force member 5 can protrude from the shell 4, the force transmission part is transmission-connected to the first sub-sealing support 171, the force member 5 passes through the driving through hole 49 of the shell 4, and the force member 5 and the shell 4 are arranged to slide relative to each other.

[0043] By making the force-applying component 5 protrude from the shell 4 and pressing the force-applying component 5, a force can be applied to the force transmission part, and the force transmission part is connected to the first sub-sealing support 171 in a transmission manner, thereby driving the first sub-sealing support 171 to move relatively away from the second sub-sealing support 172, thereby forming a drainage channel in the space between the sub-sealing supports.

[0044] like Figure 2 and Figure 3As shown, in an optional embodiment, the force transmission part is fixedly connected to the first sub-sealing support member 171. Specifically, the force transmission part includes an L-shaped rod 181, a horizontal free end of the L-shaped rod 181 is connected to the first sub-sealing support member 171, and a vertical free end of the L-shaped rod 181 can be abutted against the force-applying member 5. In order to increase the rigidity of the L-shaped rod 181, a reinforcing rib can also be provided between the vertical and horizontal of the L-shaped rod. In order to increase the contact area between the L-shaped rod 181 and the force-applying member 5, a contact head 182 is provided at the free end of the L-shaped rod 181, and the shape of the contact head 182 can be a cylinder with a diameter larger than the vertical part of the L-shaped rod 181, or an ellipsoid with a short axis as the axis of symmetry, and the long axis of the ellipsoid is larger than the diameter of the vertical part of the L, or a sphere.

[0045] By fixedly connecting the force transmission part and the first sub-sealing support 171, not only can the connection strength between the first sub-sealing support 171 and the force transmission part be improved to avoid damage to the force transmission part, but also the connection stiffness between the self-sealing part and the force transmission part can be improved, thereby increasing the distance between the two sub-sealing supports when they are opened, making it easier to increase the speed of draining water in the pipe network and saving operation time.

[0046] like Figure 8 As shown, in an optional embodiment, the force-applying member 5 includes a control end 53 and a connecting portion 52, the control end 53 is located outside the housing 4, the connecting portion 52 is fixedly connected to the control end 53, and when the control end 53 is pressed toward the housing 4, the connecting portion 52 can protrude from the housing 4 to the inside of the housing 4 and contact the force transmission portion. Specifically, a plurality of annular ridges can be provided on the circumferential surface of the control end 53, and the provision of the annular ridges facilitates the increase of the friction between the hand and the control end 53 when the force-applying member 5 is lifted outside the housing 4. The connecting portion 52 can be slidably connected to the drive through hole 49 of the housing 4, and the two can be kept sealed. Specifically, in this embodiment, the entire force-applying member 5 can be a rubber plug.

[0047] By setting the control end 53 outside the housing 4, it is convenient to manually press the control end 53 to drive the connecting part 52 to contact the force transmission part and apply force to the force transmission part, so as to transfer the action outside the housing 4 to the inside of the housing 4 and transmit it to the first sub-sealing support 171.

[0048] In an optional embodiment, the force-applying member 5 further includes a limiting end 51, which is connected to one end of the connection portion 52 located in the housing 4, and the maximum transverse dimension of the limiting end 51 is greater than the diameter of the driving through hole 49. Specifically, the position at which the limiting end 51 is arranged on the connection portion 52, that is, the length of the portion of the connection portion 52 located between the control end 53 and the limiting end 51, can reach the following state: when the force-applying member 5 is pulled outward from the housing 4 to the maximum position, the innermost end of the force-applying member 5 is separated from the force transmission portion, and at this time, the multiple sub-sealing supports can also be completely closed under the pressure of the elastic sealing member 2 to prevent water from flowing out from between the sub-sealing supports.

[0049] By setting a limit end 51 whose maximum lateral dimension is larger than the diameter of the driving through hole 49 , it is possible to prevent the force-applying member 5 from being pulled out of the shell 4 as a whole when the force-applying member 5 is pulled outward, and the force-applying member 5 needs to be inserted into the driving through hole 49 in the shell 4 again.

[0050] In an optional embodiment, the limiting end 51 is made of elastic material, specifically, rubber material, and the circumference of the limiting end 51 is in the shape of a truncated cone, the axial direction of the truncated cone is the same as the length direction of the force-applying member 5, and the side of the limiting end 51 facing the housing 4 is a plane perpendicular to the axis of the truncated cone. The maximum diameter of the truncated cone is slightly larger than the diameter of the drive through hole 49, and also slightly larger than the diameter of the connecting portion 52. When the force-applying member 5 needs to be installed on the drive through hole 49, the control end 53 can be pressed toward the inner side of the housing 4, and the truncated cone surface of the limiting end 51 is squeezed by the outer end of the driven through hole 49, deformed, and passes through the drive through hole 49.

[0051] The limiting end 51 is set to be conical, which is conducive to the deformation of the limiting end 51 made of elastic material when the force member 5 is installed, so that it can pass through the driving through hole 49 smoothly. In addition, the side of the limiting end 51 facing the inner wall of the shell 4 is set to the above angle, so that when the force member 5 is pulled out, the side of the limiting end 51 facing the inner wall of the shell 4 and the end of the driving through hole 49 located on the inner wall of the shell 4 can generate friction self-locking, thereby preventing the force member 5 from being completely pulled out of the driving through hole 49.

[0052] like Figure 2 and Figure 3As shown, in an optional embodiment, a support member is further included, the support member is connected to the sealing support member, the support member includes two sub-support members, one of which is a movable sub-support member 161, and the other sub-support member is a fixed sub-support member 162, the fixed sub-support member 162 is connected to the second sub-sealing support member 172, the movable sub-support member 161 is connected to the first sub-sealing support member 171, and the movable sub-support member 161 can move relative to the second sub-sealing support member 172. Specifically, in this embodiment, each sub-support member is fixedly connected to the sub-sealing support member. The sub-support member can be rod-shaped or sheet-shaped.

[0053] By providing the sub-support member, it is convenient to fix the sub-sealing support member so that the sub-sealing support member can return to its original position after being relatively opened or closed, so as to ensure reliable sealing every time.

[0054] In an optional embodiment, the movable sub-support member 161 is an elastic sub-support member, and the direction of elastic deformation of the elastic sub-support member is the direction that causes the sub-sealing support member to open and close relatively.

[0055] Setting the movable sub-support 161 as an elastic sub-support can not only adapt to the movement of the sub-sealing support, but also the elastic sub-support can provide a certain restoring force to the first sub-sealing support 171. A part of the force acting on the sub-sealing support through the force transmission part can be balanced by the elastic sub-support to avoid damage to the elastic sealing member 2 due to excessive force.

[0056] In an optional embodiment, each sub-support may include a straight portion, an oblique portion, and a connection end connected in sequence from away from the sub-sealing support to close to the sub-sealing support. The spacing and external dimensions between the straight portions of each sub-support, and the spacing and external dimensions between the oblique portions of each sub-support are greater than the spacing and external dimensions of the connection ends of each sub-support. The sealing support protrudes from the outer surface of the connection end where the support is connected to the sealing support in the lateral direction of the support.

[0057] By setting the sub-support and the sub-sealing support into the above-mentioned shapes, the sub-sealing support can be used to prop up the elastic sealing member 2 outward to form a seal between the two. Moreover, by setting the connection end as the smallest part of the sub-support, the first sub-sealing support 171 can move outward when subjected to the force of the driving assembly to form a channel for water to flow out between the sub-sealing supports.

[0058] like Figure 4As shown, correspondingly, the elastic seal 2 is roughly trumpet-shaped, and the elastic seal 2 includes a first straight cylindrical portion 22, a conical cylindrical portion 23 and a second straight cylindrical portion 24. The first straight cylindrical portion 22, the conical cylindrical portion 23 and the second straight cylindrical portion 24 are connected in sequence, and the inner surface and the outer surface are continuously transitioned. Among them, the end of the first straight cylindrical portion 22 away from the conical cylindrical portion 23 forms a sealing water inlet end 21, and the inner diameter of the sealing water inlet end 21 is D21, which is also the inner diameter of the first straight cylindrical portion 22, and the outer diameter of the first straight cylindrical portion 22 is D21'. The end of the conical cylindrical portion 23 close to the first straight cylindrical portion 22 is larger than the other end, that is, D21>D22. The inner diameter of the second straight cylindrical portion 24 in the spontaneous state is D22. The spontaneous state refers to a state in which the elastic seal is not affected by any external force except gravity. The outer diameter is D22'. D22 is smaller than the overall diameter D13 of the sealing support. D13 is the major axis length of the ellipsoid. The end of the second straight cylindrical portion 24 away from the conical cylindrical portion 23 is formed as a water outlet end 25 of the seal. The inner diameter of the water outlet end 25 of the seal is also D22.

[0059] The first straight cylindrical portion 22 is located outside the linear portion of the sub-support, and when the sealing support is not pried open by the driving assembly, the linear portion of the sub-support is separated from the inner wall of the first straight cylindrical portion 22 .

[0060] The conical cylindrical portion 23 is sleeved on the outside of the oblique portion, and the second straight cylindrical portion 24 is sleeved on the outside of the connecting end and the sealing support. Since a part of the second straight cylindrical portion 24 is expanded by the sealing support, the connecting end may be detached from the inner wall of the second straight cylindrical portion 24.

[0061] By configuring the elastic sealing member 2 to be roughly trumpet-shaped, when the water pressure increases, there is a larger expansion space on the outside of the conical cylindrical portion 23 and the second straight cylindrical portion 24, so as to facilitate the discharge of the stored water in the pipe network from the space inside the conical cylindrical portion 23 and the space between the second straight cylindrical portion 24 and the sealing support.

[0062] In an optional embodiment, it further includes a support mounting body 1 , in which the first sub-sealing support member 171 and the support mounting body 1 are relatively movable, and the shell 4 directly or indirectly applies a force to the elastic sealing member 2 toward the support mounting body 1 .

[0063] By using the shell 4 to press the elastic seal 2 onto the supporting installation body 1, the supporting installation body 1 can withstand the axial force along the length direction of the device, thereby preventing the elastic seal 2 from moving and causing sealing failure.

[0064] like Figure 4As shown, specifically, the elastic seal 2 includes an annular convex ridge portion 26 located at one end of the first straight cylindrical portion 22 away from the conical cylindrical portion 23, the outer diameter of the annular convex ridge portion 26 is D23, and the inner diameter of the annular convex ridge portion 26 is D24. The support mounting body 1 is provided with a square boss portion 14 protruding toward one side of the housing 4, the square boss portion 14 is a square with four rounded corners, and the distance between two opposite sides of the square is D1, wherein the rounded corners do not refer to the two ends of the rounded arc being tangent to the edge of the square like a rounded rectangle, but to the fact that each arc portion is centered on the center of the square. The outer diameter D23 of the annular convex ridge portion 26 is the same as the distance D1 of the opposite sides of the square boss portion 14. The surface of the square boss portion 14 on one side facing the sealing support is also provided with a conical boss portion 15, the bottom diameter of the conical boss portion 15 is D11, and the top diameter is D12, and D11>D12. The inner diameter D24 of the annular rib portion 26 is the same as D11.

[0065] like Figure 7 As shown, the housing 4 is not in direct contact with the annular ridge, but:

[0066] Adjacent to the first internal thread portion 410, the housing 4 is provided with a stepped hole portion 42. An annular gland 3 is installed in the stepped hole portion 42 of the housing 4. Figure 5 and Figure 6 As shown, the cross section of the gland 3 is roughly L-shaped, and a square groove portion 31 is provided on one side of the gland 3 facing the square boss portion 14. The cross-sectional shape of the square groove portion 31 in the axial direction perpendicular to the gland 3 matches the shape of the square boss portion 14, which will not be repeated here. The shape of the square groove portion 31 matches the shape of the square boss portion 14, so that after the square groove portion 31 and the square boss portion 14 are buckled, the gland 3 and the square boss portion 14 will no longer rotate. Even if the housing 4 and the supporting mounting body 1 rotate, the gland 3 and the annular convex ridge portion 26 will not rotate, thereby reducing the wear of the elastic seal 2, so as to maintain its sealing performance. A first internal thread portion 410 is provided at one end of the housing 4 located at the housing inlet end 41, and the first internal thread portion 410 is threadedly connected to the external thread portion 110 of the mounting body provided on the supporting mounting body 1. The threaded connection provides a force to compress the annular convex ridge portion 26 of the elastic seal 2.

[0067] The gland 3 is provided with a gland through hole 32 on the side away from the square boss portion 14, and the inner diameter of the gland through hole 32 is D31, which is slightly larger than the outer diameter D21' of the first straight cylindrical portion 22. When the first internal thread portion 410 is threadedly connected with the external thread portion 110 in the mounting body, the end surface of the step hole portion 42 presses the gland 3, and then the gland 3 presses the annular convex ridge portion 26, thereby fixing the elastic seal 2.

[0068] Adjacent to the step hole portion 42, the shell 4 is also provided with a shell cylindrical middle portion 43. The inner diameter of the shell cylindrical middle portion 43 is D41, which is smaller than the inner diameter of the step hole portion 42. D41 is the same as the outer diameter D21' of the first straight cylindrical portion 22 of the elastic seal 2. In this way, accurate radial positioning of the first cylindrical portion can be maintained, thereby avoiding excessive pressure on part of the sealing support body and smaller pressure on part of the sealing support body due to the inconsistency between the center line of the elastic seal 2 during installation and the axis of the shell 4 and the axis of the supporting mounting body 1, thereby improving the uniformity of the seal. In addition, the cylindrical middle portion 43 of the shell is also provided with an exhaust hole 47 that penetrates the shell 4. The setting of the exhaust hole 47 can reduce the space between the conical cylindrical portion 23 and the second straight cylindrical portion 24 of the elastic seal 2 and the inner wall of the cylindrical middle portion 43 of the shell when they expand outward due to water pressure. The gas in the space can be discharged outward when it is compressed, so as to avoid interference or restriction of the expansion of the elastic seal 2 due to the increase in air pressure, thereby affecting the drainage performance and reducing the head loss caused by water flow through the device.

[0069] The inner wall of the shell 4 is also provided with an annular inner flange 48, the inner diameter of which is D42, which is smaller than D41, and which is the same as the outer diameter D22' of the second straight cylindrical portion 24 of the elastic seal 2. The annular inner flange 48 is provided with a tapered transition section 44 toward the cylindrical middle portion 43 of the shell. The inner wall of the shell 4 is also provided with a shell outlet cylindrical portion 45, which is located on the side of the annular inner flange 48 facing the shell outlet end 46, the inner diameter of the shell outlet cylindrical portion 45 is smaller than the inner diameter of the cylindrical middle portion 43 of the shell, and the driving through hole 49 is provided on the shell outlet cylindrical portion 45. The shell outlet end 46 is also provided with a second internal threaded portion 411, which can be connected to a suspended nozzle or a capillary water inlet.

[0070] like Figure 1 As shown, in addition, in order to improve the rigidity of the shell 4, a Y-shaped reinforcing rib 412 can also be provided. The reinforcing rib 412 is provided on the outside of the shell outlet cylindrical portion 45, and two Y-shaped reinforcing ribs 412 are symmetrically provided.

[0071] In addition, the support mounting body 1 also includes a mounting body water inlet 11 arranged at one end of the support mounting body 1, a mounting body channel 12 connected to the mounting body water inlet 11 and extending along the length direction of the support mounting body 1, a mounting body water outlet 13 located at the other end of the first channel, a mounting body end external threaded portion 19 arranged on the side wall of the mounting body channel 12, and a wrench bayonet 111 arranged between the mounting body end external threaded portion 19 and the mounting body middle external threaded portion 110, and the mounting body end external threaded portion 19 can be connected to the water outlet of the final water supply pipe. The mounting body water inlet 11, the mounting body channel 12, the mounting body water outlet 13, the mounting body end external threaded portion 19, the mounting body middle external threaded portion 110, the square boss portion 14, the conical boss portion 15, the wrench bayonet 111, and the ellipsoid of the sealing support are all coaxially arranged.

[0072] The operating principle of this embodiment is as follows:

[0073] like Fig. 9As shown, when assembling the various parts, first, the second straight cylindrical portion 24 of the elastic seal 2 is sleeved on the sealing support. At the same time, the end face of the annular convex ridge portion 26 contacts the square boss portion 14 of the support mounting body 1. Since the diameter D13 of the sealing support is larger than the inner diameter D22 of the second straight cylindrical portion 24, and the elastic seal 2 is supported by elastic rubber or silicone and has good elasticity, the first sub-sealing support 171 and the second sub-sealing support 172 of the sealing support can be tightly clamped together, and the first sub-sealing support 171 and the second sub-sealing support 172 are watertight, and the elastic seal 2 and the sealing support are also watertight. water; then, the gland through hole 32 of the gland 3 is sleeved on the outside of the elastic seal 2, and its square groove part 31 is buckled on the square boss part 14 of the support mounting body 1; then, the first internal thread part 410 of the shell 4 is threadedly connected with the external thread part 110 of the mounting body of the support mounting body 1, and the elastic seal 2 forms a sealed space with the support mounting body 1 under the action of the gland 3 and the shell 4; finally, the force member 5 is inserted into the drainage drive through hole 49 and slightly pulled outward, that is, the lower bottom surface of the limit end 51 contacts the inner wall of the shell outlet cylindrical part 45, at this time, the upper top surface of the limit end 51 just contacts with the contact head 182 of the force transmission part, or is separated from it. It should be noted that, since the structure in which the force member and the force transmission part are separately arranged is adopted, it is not necessary for the force member to be completely colinear with a vertical part of the L-shaped rod 181, and it can also be achieved by pressing the control end 53 inward to finally drive the first sub-sealing support 171 to move. Moreover, a contact head 182 is provided at the top end of the L-shaped rod 181, and the width of the contact head 182 is greater than the cross section of the L-shaped rod 181, which can also increase the probability of the inner end of the force-applying member contacting the contact head 182. In addition, since the annular ridge portion 26 of the elastic seal is elastic, the sealing of the square boss portion 14, the conical boss portion 15 and the annular ridge portion 26 can be achieved regardless of whether the annular ridge portion 26 is compressed by 35% or 55%. That is, when the sealing is achieved, the number of rotations on the first internal thread portion 410 and the external thread portion 19 at the mounting body end is not absolutely unique. When the irrigation system is not started, or the water supply pressure is small and insufficient to cause the elastic seal 2 to deform, water cannot move to the downstream through the gap between the elastic seal 2 and the sealing support.

[0074] like Fig.10As shown, when the pressure of the irrigation system increases to the rated working pressure, the first straight cylindrical portion 22, the tapered cylindrical portion 23, and the second straight cylindrical portion 24 of the elastic seal 2 are deformed, and a gap appears between the elastic seal 2 and the sealing support. As shown in the figure, water can sequentially pass through the mounting body water inlet 11 and the mounting body channel 12 of the supporting mounting body 1, the sealing water inlet end 21, the first straight cylindrical portion 22, the tapered cylindrical portion 23, the second straight cylindrical portion 24, and the sealing water outlet end 25 of the elastic seal 2, and the shell outlet cylindrical portion 45 of the shell 4, and finally flow out from the shell outlet end 46 of the shell 4. In addition, since the force member 5 is elastic, a seal can be formed between it and the driving through hole 49, and water will not leak out from between the driving through hole 49. When the pressure of the irrigation system is reduced to below the rated working pressure, the elastic seal 2 returns to its original state, and the sealing contact surface between the elastic seal 2 and the sealing support is restored. In addition, under the exhaust effect of the exhaust hole 47 of the shell 4, the deformation of the elastic sealing member 2 will not be affected by the air pressure and can be freely expanded and contracted.

[0075] like Fig.11 As shown, when winter comes, the water supply network system and the water stored in the present invention need to be discharged to prevent the temperature from dropping to the freezing point and the expansion of the stored water from damaging the network system and the present invention. The control end 53 of the force member 5 can be pressed downward toward the shell 4 as shown in the figure. At this time, the limit end 51 and the connecting part 52 of the force member 5 press the contact head 182 downward, driving the contact head 182 to move downward, and then driving the L-shaped rod 181 to move downward. At the same time, the L-shaped rod 181 also moves the first sub-sealing support 171 and the movable sub-support 161 downward. At this time, the first sub-sealing support 171 and the second sub-sealing support 172 of the supporting installation body 1 are separated, and a water flow gap is formed. The water stored in the network system and the present invention can flow out in the direction of the water flow as shown in the figure. When the stored water is drained, the control end 53 of the force member 5 is pulled upward to restore the anti-drip function of the present invention.

[0076] Embodiment 2:

[0077] This embodiment provides an irrigation system, comprising any one of the above-mentioned irrigation anti-drip devices.

[0078] Since the irrigation system provided in the present aspect includes any of the above-mentioned irrigation anti-drip devices, it has the technical effects of any of the above-mentioned irrigation anti-drip devices, which will not be described in detail here.

[0079] Since a plurality of the above-mentioned irrigation anti-drip devices are provided, when the pressure in the pipeline is greater than enough to cause the elastic seal to deform, each irrigation anti-drip device will be opened almost simultaneously, which significantly reduces the time difference in starting operation of each sprinkler or dripper due to different locations and pipeline lengths, and is conducive to improving the uniformity of irrigation.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. For example:

[0081] In the first embodiment, the force-applying member is slidably connected to the housing, which does not negate the fact that the force-applying member and the housing can rotate relative to each other. In other words, the cross-sections of the connection portion, the control end, and the limit end of the force-applying member can actually be circular or polygonal, as long as they can be inserted into the drive through hole and can slide in the drive through hole as described in the embodiment.

[0082] In the first embodiment, the side surface of the limit end facing the inner wall of the shell is a plane, and the limit end has an overall truncated cone shape. In fact, it can also be a cone. As long as the tangent value of the angle formed by the side of the limit end facing the shell and the length direction of the force-applying member is greater than the friction coefficient between the first material of the limit end and the second material at the driving through hole of the shell, friction self-locking is formed to prevent the force-applying member from being completely pulled out upward.

[0083] In the first embodiment, two sub-sealing support members are provided. In fact, multiple sub-sealing support members may be provided, for example, 3 or 4 sub-sealing support members, so that there are more options when the internal thread of the housing and the external thread of the supporting mounting body are tightened. Accordingly, the number of sub-support members is the same as that of the sub-sealing support members, and also changes with the change in the number of sub-sealing support members.

[0084] In the first embodiment, a plurality of annular ridges are provided on the peripheral surface of the control end. In fact, a plurality of convex points or knurling may also be provided, which may also play the same role of increasing friction.

[0085] In the first embodiment, both sub-support members can be elastic sub-support members, which is set to improve the uniformity of material selection and ensure the uniformity of force on the elastic seal in all directions without being driven by the driving assembly. In fact, when the above further requirements are not considered, only the movable sub-support member can be set as an elastic sub-support member, and the other side has no corresponding elasticity.

[0086] In the first embodiment, the force transmission part is formed by the cooperation of the L-shaped rod and the rib plate. In fact, the L-shaped rod and the rib plate can be directly replaced by a triangular plate, which can also play the same role.

[0087] However, these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An irrigation anti-drip device, characterized in that: The invention comprises an elastic sealing member (2), a sealing support member and a driving assembly, wherein the elastic sealing member (2) is sleeved on the sealing support member, the sealing support member comprises at least two sub-sealing support members capable of relative movement, the at least two sub-sealing support members being capable of sealing together with the elastic sealing member (2) when the elastic sealing member (2) is in a natural state, the driving assembly being in driving connection with at least one of the sub-sealing support members, and the driving assembly being used to drive the sub-sealing support members to open each other; The irrigation anti-drip device further comprises a housing (4), the elastic sealing member (2) and the sealing support member are located in the housing (4), the driving assembly comprises a force-applying member (5) and a force-transmitting portion capable of being connected to the force-applying member (5), the force-applying member (5) being capable of protruding from the housing (4), the force-transmitting portion being drivingly connected to at least one of the sub-sealing supports, the force-applying member (5) penetrating a driving through hole of the housing (4), and the force-applying member (5) being arranged to slide relative to the housing (4); The irrigation anti-drip device also includes a support member, the support member is connected to the sealing support member, the support member includes at least two sub-support members, at least one of the sub-support members is a movable sub-support member (161), the movable sub-support member (161) is connected to at least one sub-sealing support member that is transmission-connected to the drive assembly, and the movable sub-support member (161) is capable of relative movement with at least one sub-sealing support member that is not transmission-connected to the drive assembly; The sub-support member comprises a straight line portion, an oblique line portion and a connecting end connected in sequence; The elastic sealing member (2) comprises a first straight cylindrical portion (22), a conical cylindrical portion (23) and a second straight cylindrical portion (24) which are connected in sequence, and a sealing member water inlet end (21) is provided at one end of the first straight cylindrical portion (22) away from the conical cylindrical portion (23); The first straight cylindrical portion (22) is located outside the straight portion of the sub-support, and when the sealing support is not pried open by the drive assembly, the straight portion of the sub-support is separated from the inner wall of the first straight cylindrical portion (22), so that the elastic sealing member (2) can be expanded by the upstream water pressure.

2. The irrigation anti-drip device according to claim 1, characterized in that: The force transmission portion is fixedly connected to the sub-seal support member.

3. The irrigation anti-drip device according to claim 1 or 2, characterized in that: The force-applying member (5) comprises a control end (53) and a connecting portion (52); the control end (53) is located outside the shell (4); the connecting portion (52) is fixedly connected to the control end (53); and when the control end (53) is pressed toward the shell (4), the connecting portion (52) can protrude from the shell (4) toward the inside of the shell (4) and contact the force-transmitting portion.

4. The irrigation anti-drip device according to claim 1, characterized in that: The movable sub-support member (161) is an elastic sub-support member, and the direction of elastic deformation of the elastic sub-support member is the direction in which the sub-sealing support member is relatively opened and closed.

5. The irrigation anti-drip device according to claim 1, 2 or 4, characterized in that: The sealing support is formed with a protrusion in the radial direction of the elastic sealing member, and the outer diameter of the protrusion is larger than the inner diameter of the connection portion between the elastic sealing member and the sealing support in a spontaneous state.

6. The irrigation anti-drip device according to claim 1, 2 or 4, characterized in that: A portion of the middle portion of the shell (4) located radially outside the elastic seal is provided with an exhaust hole (47) penetrating the shell.

7. The irrigation anti-drip device according to claim 1, 2 or 4, characterized in that: It also comprises a support installation body (1), at least part of the sub-sealing support member being arranged to move relative to the support installation body (1), and the shell (4) directly or indirectly applying a force to the elastic sealing member (2) towards the support installation body (1).

8. An irrigation system, characterized in that: The invention comprises the irrigation anti-drip device according to any one of claims 1 to 7.

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