CN111306340A - Irrigation Dripstops and Irrigation Systems - Google Patents

Abstract

The invention provides an irrigation drip-proof device and an irrigation system, and relates to the technical field of drip-proof of farmland irrigation. Irrigation antidrip device includes elastic sealing member, sealed support piece and drive assembly, the elastic sealing member cover is established sealed support piece is last, sealed support piece is including two at least sub-sealed support pieces that can relative motion, at least two sub-sealed support piece is in when elastic sealing member is in natural state can with elastic sealing member realizes sealed jointly, drive assembly and at least one sub-sealed support piece transmission is connected, drive assembly is used for the drive sub-sealed support piece opens each other. This scheme has solved the water of depositing in the pipe network can be along the technical problem that the dripper flows, has also reached and has deposited water in the pipe network and has initiatively discharged from the space between the sub-sealed support piece to avoid depositing the water and freezing to rise the technological effect who destroys irrigation pipe network and this device.

Description

Irrigation Dripstops and Irrigation Systems

technical field

The invention relates to the technical field of drip prevention for farmland irrigation, in particular to an irrigation drip prevention device and an irrigation system.

Background technique

Water-saving irrigation technologies mainly include sprinkler irrigation, micro-sprinkler irrigation, and drip irrigation.

For hanging sprinklers in sprinkler and micro-sprinkler technology (that is, the water supply pipe is above the sprinkler), such as the center pivot sprinkler used in field grain crops and cotton cultivation, and the upside-down sprinkler used in greenhouse seedlings, vegetables, and flower cultivation. There are the following problems in the actual use of the micro-spray system: 1. After each irrigation, the water stored in the main pipe network (main pipe, branch pipe) will move down in the form of water droplets along the nozzle, causing the bottom of the nozzle to move downward. 2. When the irrigation system starts up again, the main pipe network needs to be filled first, and the nozzles close to the water pump work first, and the nozzles close to the water pump work first, and those closest to the water pump work first. 3. When the system is just started, the pressure of the pipe network is small, and the water moves downward in the form of water droplets, which will also damage leafy vegetables and flowers.

The above problems also exist for drip irrigation technology: after each irrigation is completed, the stored water in the pipe network will flow out along the dripper; when the irrigation system starts again, the main pipe network needs to be filled first, and the pressure at the inlet end of the pipe network If the pressure is high, the pressure at the end of the pipe network is low, and there is a problem that the capillary close to the pump has been dripping water for a long time, and the capillary far away from the pump begins to drip. For the plots with large elevation difference, this phenomenon is more obvious, which significantly reduces the irrigation uniformity of the drip irrigation system, and the effect of saving water and fertilizer is not ideal. Require.

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 avoid the water in the pipe network when the irrigation stopped. The stored water flows out along the nozzle. In this scheme, whether the stored water in the pipe network flows out and the amount of the outflow water depends on the installation position of the valve relative to the nozzle and whether the valve is installed horizontally, which has great limitations in practical engineering.

SUMMARY OF THE INVENTION

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

In a first aspect, the present invention provides an anti-drip device for irrigation, comprising an elastic seal, a seal support and a drive assembly, the elastic seal is sleeved on the seal support, and the seal support includes a relative movement At least two sub-seal supports, at least two of the sub-seal supports can achieve sealing together with the elastic seal when the elastic seal is in a natural state, and the drive assembly and at least one of the sub-seal supports The parts are drive-connected, and the drive assembly is used to drive the sub-sealing support parts to open to each other.

The anti-drip device for irrigation provided by the present invention is driven by the drive assembly and at least one sub-sealing support member, and can open between the at least two sub-sealing support members to release the seal formed by the sealing support member and the elastic sealing member. Actively drains water trapped in the pipe network from the spaces between the sub-seal supports. The invention not only realizes the drainage of the irrigation pipe network and the stored water of the device before the temperature reaches the freezing point in winter without dismantling the device, and avoids the frost heaving of the stored water from damaging the system. In the case of low or no pressure in the pipe network, when the drive assembly is not actively driven, the sealing support and the elastic seal can seal the water outlet channel to prevent the water in the irrigation pipe network from being unsealed before actively unsealing. Controlled escape from spray or dripper.

In an optional embodiment, it further includes a housing, the elastic seal and the seal support are located in the housing, and the driving assembly includes a force applying member and a force transmitting force connectable with the force applying member The force-applying member can protrude from the housing, the force-transmitting portion is drivingly connected with at least one of the sub-sealing support members, the force-applying member penetrates through the driving through hole of the housing, and the force-applying portion is The force member is slidably arranged relative to the housing.

In an optional embodiment, the force transmission portion is fixedly connected with the sub-sealing support.

In an optional embodiment, the force-applying member includes a control end and a connecting portion, the control end is located outside the housing, the connecting portion is fixedly connected with the control end, and when the control end is When pressed toward the housing, the connecting portion can protrude from the housing toward the inside of the housing and come into contact with the force transmission portion.

In an optional embodiment, a support member is further included, the support member is connected with the sealing support member, the support member includes at least two sub-support members, wherein at least one of the sub-support members is a movable sub-support member, The movable sub-support is connected to at least one of the sub-seal supports that is drive-connected with the drive assembly, and the movable sub-support can be connected to at least one of the sub-seal supports that are not drive-connected to the drive assembly relative motion.

In an optional embodiment, the movable sub-support is an elastic sub-support, and the elastic deformation direction of the elastic sub-support is a direction in which the sub-sealing support is relatively opened and closed.

In an optional embodiment, the sealing supporter is formed with a protruding part in the radial direction of the elastic sealing part, and the outer diameter of the protruding part is larger than the part between the elastic sealing part and the sealing supporter spontaneously. Inner diameter in state.

In an optional embodiment, a portion of the middle portion of the housing located on the radially outer side of the elastic seal is provided with an exhaust hole penetrating the housing.

In an optional embodiment, a support installation body is further included, at least part of the sub-seal support member is relatively movable with the support installation body, and the housing directly or indirectly applies a direction to the elastic sealing member The force of the support mounting body.

In a second aspect, the present invention provides an irrigation system, comprising the irrigation drip-proof device according to any one of the above.

Since the irrigation system provided in this aspect includes any of the above-mentioned irrigation drip-prevention devices, it has the technical effects of any of the above-mentioned irrigation drip-prevention devices, which will not be repeated here.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a perspective view of an irrigation drip-proof device provided in Embodiment 1 of the present invention;

Fig. 2 is the perspective view of the drip-preventing device for irrigation according to the first embodiment, after omitting the gland, the casing and the elastic seal;

3 is a cross-sectional view of the combined part of the support installation body, the support member, the support seal and the force applying portion in the first embodiment;

4 is a cross-sectional view of the elastic seal in the first embodiment;

Fig. 5 is the left side view of the gland in the first embodiment;

6 is a cross-sectional view of the gland in the first embodiment;

7 is a cross-sectional view of the housing in the first embodiment;

8 is a schematic diagram of a force applying member in Embodiment 1;

9 is a schematic diagram of the irrigation anti-drip device according to the first embodiment when the elastic seal is not expanded by the hydraulic pressure and the driving assembly;

FIG. 10 is a schematic diagram of the anti-drip device for irrigation according to the first embodiment when the elastic seal is expanded by the upstream water pressure;

FIG. 11 is a schematic diagram of the irrigation anti-drip device according to the first embodiment when the elastic seal is expanded by the driving component.

Icon: 1-support installation body; 11-installation body water inlet; 12-installation body channel; 13-installation body water outlet; 14-square boss part; 15-conical boss part; 161-movable sub-support; 162-Fixed sub-support; 171-First sub-sealing support; 172-Second sub-sealing support; 181-L-shaped rod; 182-Contact head; Threaded part; 111-wrench bayonet; 2-elastic seal; 21-water inlet end of seal; 22-first straight cylindrical part; 23-conical cylindrical part; 24-second straight cylindrical part; 25-seal Water outlet; 26-annular convex ridge; 3- gland; 31-square groove; 32- through hole of gland; 4-shell; 41-inlet of shell; 42-step hole; 43- 44-conical transition section; 45-casing outlet cylindrical part; 46-casing outlet end; 47-vent hole; 48-annular inner flange; 49-drive through hole; 410 - First internal thread part; 411 - Second internal thread part; 412 - Reinforcing rib; 5 - Force member; 51 - Limit end; 52 - Connection part; 53 - Control end.

Detailed ways

In order to make the purposes, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.

Example 1:

As shown in Figures 1 to 11, the present embodiment provides an anti-drip device for irrigation, including an elastic seal 2, a seal support and a drive assembly. The elastic seal 2 is sleeved on the seal support. In this embodiment, the seal support The component includes two sub-sealing supports capable of relative movement, 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 the short axis. When the elastic seal 2 is in a natural state, the two sub-sealing supports can jointly achieve sealing with the elastic seal 2, and the driving assembly is drivingly connected with the first sub-sealing support 171, and the driving assembly is used to drive the sub-sealing supports to open to each other. The above-mentioned natural state refers to the state in which the sub-seal support is not driven to open by external force, and the elastic seal 2 is not expanded by water pressure, but the elastic seal 2 has been supported by the sub-seal support. state of force. When the sub-sealing support members are gathered together by the pressure of the elastic sealing member 2, the overall shape of the sealing support member may be an ellipsoid with the short axis as the axis of symmetry.

The anti-drip device for irrigation provided by the present invention is driven and connected with a sub-sealing support through the drive assembly, so that the two sub-sealing supports can be opened to release the seal formed by the sealing support and the elastic seal 2. The water stored in the pipe network is actively discharged from the space between the sub-sealing supports, not only before the temperature reaches freezing point in winter, without dismantling the device, the water stored in the irrigation pipe network and the device can be discharged to avoid storage. Water frost heave damages the irrigation system; when the pressure of the irrigation pipe network is low or there is no pressure, the water outlet channel can be sealed by the sealing support and the elastic sealing element 2 without actively driving the driving components, avoiding The trapped water leaks uncontrollably from the sprinkler or dripper before actively unsealing.

In an optional embodiment, it also includes a housing 4, the elastic seal 2 and the sealing support are located in the housing 4, and the driving assembly includes a force applying member 5 and a force transmitting portion that can be connected with the force applying member 5, and the force applying The member 5 can protrude from the casing 4 , the force transmission part is drivingly connected with the first sub-sealing support 171 , the force applying member 5 penetrates the driving through hole 49 of the casing 4 , and the force applying member 5 is relatively slidably arranged with the casing 4 .

By protruding the force-applying member 5 from the housing 4 and pressing the force-applying member 5, a force can be applied to the force transmission part, and the force transmission part is in a driving connection with the first sub-sealing support 171, so that the first sub-sealing support 171 can be driven. The sealing supporter 171 is moved relatively away from the second sub-sealing supporter 172, so that the space between the sub-sealing supporters can form a drainage channel.

As shown in FIG. 2 and FIG. 3 , in an optional embodiment, the force transmission part is fixedly connected with the first sub-sealing support 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 171 , and a vertical free end of the L-shaped rod 181 is connected to the force-applying member 5 Abut. In order to improve the rigidity of the L-shaped rod 181, a reinforcing rib may also be provided between a vertical and a horizontal of the L-shaped. In order to improve 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 a vertical part of the L-shaped rod 181, Or an ellipsoid with the short axis as the axis of symmetry, the long axis of the ellipsoid is greater than the diameter of the vertical part of L, or it is a sphere.

By fixing the connection between the force transmission part and the first sub-sealing support 171, not only the connection strength between the first sub-sealing support 171 and the force transmission part can be improved, the damage of the force transmission part can be avoided, but also the self-sealing can be improved. The rigidity of the connection between the parts and the force transmission part is increased, thereby increasing the distance between the two sub-sealing supports when they are opened, which is convenient to improve the speed of draining the water stored in the pipe network, and saves the operation time.

As shown in FIG. 8 , 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 , and the connecting portion 52 is fixedly connected to the control end 53 , and when the control When the end 53 is pressed toward the housing 4 , the connecting portion 52 can protrude out of the housing 4 toward the inside of the housing 4 and come into contact with the force transmission portion. Specifically, a plurality of annular ridges may be provided on the peripheral surface of the control end 53 . The arrangement of the annular ridges facilitates the increase of friction between the hand and the control end 53 when the force applying member 5 is lifted out of the housing 4 . force. The connecting portion 52 can be slidably connected with the driving through hole 49 of the housing 4, and a seal can be maintained therebetween. Specifically, in this embodiment, the entire force applying member 5 may be a rubber plug.

By arranging the control end 53 located 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. Thereby, the action outside the casing 4 is transferred to the inside of the casing 4 and transmitted to the first sub-sealing support 171 .

In an optional embodiment, the force-applying member 5 further includes a limit end 51 , the limit end 51 is connected to an end of the connecting portion 52 located in the housing 4 , and the maximum lateral dimension of the limit end 51 is larger than the drive through hole 49 diameter of. Specifically, the position where the limiting end 51 is arranged on the connecting portion 52 , that is, the length of the portion of the connecting portion 52 located between the control end 53 and the limiting end 51 , can reach the following state, the force-applying member 5 is removed from the housing When the middle part 4 is pulled out to the maximum position, the innermost end of the force applying member 5 is disengaged from the force transmission part, and at this time, the plurality of sub-sealing supports can also be completely closed under the pressure of the elastic seal between the sub-sealing supports.

By setting the limit end 51 whose maximum lateral dimension is larger than the diameter of the driving through hole 49, it can be prevented that when the force applying member 5 is pulled out, the entire force applying member 5 is pulled out from the housing 4, and the force applying member 5 needs to be pulled out again. The member 5 is inserted into the drive through hole 49 in the housing 4 .

In an optional embodiment, the limiting end 51 is made of elastic material, specifically, rubber material, the peripheral surface of the limiting end 51 is a truncated cone, and the axial direction of the truncated cone is the same as the length direction of the force applying member 5 , The side of the limiting end 51 facing the housing 4 is a plane perpendicular to the axis of the truncated cone. Among them, the maximum diameter of the truncated cone is slightly larger than the diameter of the driving 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 driving through hole 49, it can be pressed in the direction of the inner side of the housing 4. The outer end of the conical frustum of the control end 53 and the limiting end 51 is pressed by the outer end of the driving through hole 49 and deformed to pass through the driving through hole 49 .

Setting the limiting end 51 in a conical shape is beneficial for the limiting end 51 made of elastic material to deform when the force applying member 5 is installed, and to pass through the driving through hole 49 smoothly. Moreover, the side of the limiting end 51 facing the inner wall of the casing 4 is set to the above angle, so that when the force applying member 5 is pulled out, the side of the limiting end 51 facing the inner wall of the casing 4 can be connected to the driving through hole. The end of the 49 located on the inner wall of the housing 4 produces frictional self-locking, which prevents the force applying member 5 from being completely pulled out from the driving through hole 49 .

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

By arranging the sub-supports, it is convenient to fix the sub-sealing supports, so that the sub-sealing supports can be restored to the original position after the relative opening or closing, so as to ensure reliable sealing every time.

In an optional embodiment, the movable sub-support 161 is an elastic sub-support, and the elastic deformation direction of the elastic sub-support is a direction in which the sub-sealing supports are relatively opened and closed.

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 give the first sub-sealing support 171 a certain restoring force, which acts through the force transmission part. A part of the force acting on the sub-seal support can be balanced by the elastic sub-support to avoid damage to the elastic seal 2 due to excessive force.

In an optional embodiment, each sub-support member may include a straight line portion, an oblique line portion and a connection end connected in sequence from far away from the sub-sealing support member to approaching the sub-sealing support member. The distance between the straight line parts and the outer dimension and the distance between the oblique line parts of each sub-support part are larger than the distance and the outer dimension of the connection ends of each sub-support part. The sealing supporter protrudes from the outer surface of the connecting end where the supporter is connected with the sealing supporter in the transverse direction of the supporter.

By arranging the sub-support and the sub-sealing support into the above-mentioned shapes, the elastic sealing member 2 can be supported outward by the sub-sealing support to form a seal therebetween. Moreover, setting the connection end as the smallest part of the sub-supports allows the first sub-sealing support 171 to move outward when subjected to the force of the driving assembly, so as to form a water supply outflow between the sub-sealing supports channel.

As shown in FIG. 4 , correspondingly, the elastic sealing member 2 is substantially trumpet-shaped, and the elastic sealing member 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 both continuously transitioned. Wherein, the end of the first straight cylindrical portion 22 away from the conical cylindrical portion 23 is formed with a water inlet end 21 of a sealing member, and the inner diameter of the water inlet end 21 of the sealing member is D21, and D21 is also the inner diameter of the first straight cylindrical portion 22, and the first The outer diameter of the straight cylindrical portion 22 is D21'. One end of the tapered 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 the state in which the elastic seal is completely unaffected by external forces except gravity. The outer diameter is D22', and D22 is smaller than the overall diameter D13 of the sealing support. , D13 is the length of the long axis of the ellipsoid, the end of the second straight cylindrical portion 24 away from the conical cylindrical portion 23 is formed as the water outlet end 25 of the seal, and the inner diameter of the water outlet 25 of the seal is also D22.

The first straight cylindrical portion 22 is located outside the straight portion of the sub-support, and when the sealing support is not opened by the driving assembly, the straight portion of the sub-support is separated from the inner wall of the first straight cylindrical portion 22 .

The tapered cylindrical portion 23 is sleeved on the outer side of the oblique line portion, and the second straight cylindrical portion 24 is sleeved on the outer side of the connecting end and the sealing support. The ends may be disengaged from the inner wall of the second straight cylindrical portion 24 .

By arranging the elastic sealing member 2 in a substantially flared shape, when the water pressure increases, the outer sides of the conical cylindrical portion 23 and the second straight cylindrical portion 24 have a larger expansion space, so as to facilitate the storage of water in the pipe network from The space within the tapered cylindrical portion 23, the space between the second straight cylindrical portion 24 and the seal supporter is discharged.

In an optional embodiment, the support installation body 1 is also included, the first sub-sealing support member 171 and the support installation body 1 are relatively movable relative to each other, and the housing 4 directly or indirectly applies the elastic sealing member 2 toward the support installation body. 1 force.

By using the housing 4 to press the elastic seal 2 on the support and installation body 1 , the support and installation body 1 can bear the axial force along the length direction of the device, so as to avoid the seal failure caused by the movement of the elastic seal 2 .

As shown in FIG. 4 , specifically, the elastic sealing member 2 includes an annular convex rib 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 rib portion 26 is D23, and the ring The inner diameter of the ridge portion 26 is D24. The support mounting body 1 is provided with a square boss portion 14 protruding toward the side of the housing 4 , the square boss portion 14 is a square with four corners rounded, and the distance between the two opposite sides of the square is D1 , in which rounded corners do not mean that the two ends of the arc with rounded corners such as a rounded rectangle are tangent to the edge of the square, but that each arc part is centered on the center of the square. The outer diameter D23 of the annular ridge portion 26 is the same as the distance D1 between the opposite sides of the square boss portion 14 . The side surface of the square boss portion 14 facing the sealing support is further provided with a tapered boss portion 15 , the bottom diameter of the tapered boss portion 15 is D11, and the top diameter is D12, D11>D12. The inner diameter D24 of the annular ridge portion 26 is the same as D11.

As shown in Figure 7, the shell 4 is not in direct contact with the annular ridge, but:

Adjacent to the first female thread portion 410 , the housing 4 is provided with a stepped hole portion 42 . A ring-shaped press cover 3 is installed in the stepped hole portion 42 of the housing 4 . As shown in FIG. 5 and FIG. 6 , the section of the press cover 3 is substantially L-shaped, and the side of the press cover 3 facing the square boss portion 14 is provided with a square groove portion 31 , and the square groove portion 31 is perpendicular to the pressure The cross-sectional shape of the cover 3 in the axial direction matches the shape of the square boss portion 14 , and details are not repeated here. The shapes of the square groove portion 31 and the square boss portion 14 are matched, so that after the square groove portion 31 and the square boss portion 14 are fastened together, there will be no rotation between the gland 3 and the square boss portion 14, even if The rotation of the housing 4 and the supporting and mounting body 1 will not cause the rotation between the pressing cover 3 and the annular ridge portion 26 , so that the wear of the elastic sealing member 2 can be reduced, and the sealing performance thereof can be maintained. A first inner thread portion 410 is provided at one end of the casing 4 at the inlet end 41 of the casing, and the first inner thread portion 410 is threadedly connected with the outer thread portion 110 in the mounting body provided on the supporting mounting body 1 . The threaded connection provides a force to compress the annular ridge 26 of the elastomeric seal 2 .

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 . After the first internal thread portion 410 is threadedly connected with the external thread portion 110 of the mounting body, the end face of the stepped hole portion 42 presses the press cover 3, and then presses the press cover 3 against the annular ridge portion 26, thereby fixing the elastic sealing member 2 .

Adjacent to the stepped hole portion 42 , the casing 4 is further provided with a casing cylindrical middle portion 43 , the inner diameter of the casing cylindrical middle portion 43 is D41 , D41 is smaller than the inner diameter of the stepped hole portion 42 , and D41 is the first of the elastic seal 2 . The outer diameter D21' of the straight cylindrical part 22 is the same, so that the accurate radial positioning of the first cylindrical part can be maintained, so as to avoid the center line of the elastic seal 2 during installation and the axis of the casing 4 and the axis of the support installation body 1. Therefore, the pressure of some sealing supports is too large, and the pressure of some sealing supports is small, which improves the uniformity of sealing. In addition, the central cylindrical portion 43 of the casing is also provided with an exhaust hole 47 penetrating the casing 4. The arrangement of the exhaust hole 47 can make the conical cylindrical portion 23 and the second straight cylindrical portion 24 of the elastic seal 2 due to the water When the pressure expands outward, the space between the two and the inner wall of the cylindrical middle part 43 of the casing is reduced, and the gas in the space can be discharged outward when compressed, so as to avoid disturbing or restricting the elastic seal due to the increase of air pressure. The expansion of the component 2 affects the drainage performance and reduces the head loss caused by the water flow through the device.

The inner wall of the housing 4 is also provided with an annular inner flange 48, the inner diameter of the annular inner flange 48 is D42, D42 is smaller than D41, and D42 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 conical transition section 44 toward the cylindrical middle 43 of the casing. The inner wall of the casing 4 is also provided with a casing outlet cylindrical portion 45, the casing outlet cylindrical portion 45 is located on the side of the annular inner flange 48 facing the casing outlet end 46, and the inner diameter of the casing outlet cylindrical portion 45 is A driving through hole 49 is provided on the casing outlet cylindrical portion 45 smaller than the inner diameter of the casing cylindrical middle portion 43 . The outlet end 46 of the casing is further provided with a second internal thread portion 411, and the second internal thread portion 411 can be connected to the hanging spray head or the capillary water inlet.

As shown in FIG. 1 , in addition, in order to improve the rigidity of the casing 4, a Y-shaped reinforcing rib 412 can be provided. The ribs 412 are arranged symmetrically.

In addition, the support installation body 1 further includes a water inlet port 11 of the installation body disposed at one end of the support installation body 1 , and an installation body channel 12 communicated with the water inlet port 11 of the installation body and passing through the length direction of the support installation body 1 , located in the first channel The mounting body water outlet 13 at the other end, the mounting body end external thread portion 19 provided on the side wall of the mounting body channel 12, and the wrench bayonet between the mounting body end external thread portion 19 and the mounting body middle external thread portion 110 111, the external thread portion 19 of the mounting body end can be connected to the water outlet of the final water supply pipeline. The installation body water inlet 11, the installation body channel 12, the installation body water outlet 13, the installation body end external thread part 19, the installation body middle external thread part 110, the square boss part 14, the conical boss part 15, the wrench bayonet 111, The ellipsoids of the sealing support are all coaxially arranged.

The action principle of this embodiment is as follows:

As shown in FIG. 9 , when assembling the various components, firstly, the second straight cylindrical portion 24 of the elastic sealing member 2 is put on the sealing support member. The square boss portions 14 are in contact with each other. 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 sealing member 2 is supported by elastic rubber or silicone, it has good elasticity, and the sealing support can be The first sub-sealing support 171 and the second sub-sealing support 172 are tightly hooped together, the first sub-sealing support 171 and the second sub-sealing support 172 are watertight, the elastic seal 2 and the seal The support members are also watertight; then the through hole 32 of the gland 3 is sleeved on the outer side of the elastic seal 2, and its square groove portion 31 is buckled on the square boss portion 14 of the support installation body 1; then The first internal thread portion 410 of the housing 4 is threadedly connected with the external thread portion 110 of the mounting body supporting the mounting body 1, and the elastic seal 2 forms a seal with the supporting mounting body 1 under the action of the gland 3 and the housing 4. Finally, insert the force-applying member 5 into the drainage driving through hole 49 and pull it out slightly, that is, the lower bottom surface of the limiting end 51 is in contact with the inner wall of the casing outlet cylindrical portion 45, at this time, the limiting end The upper top surface of 51 is just in contact with the contact head 182 of the force transmission part, or is disengaged therefrom. Among them, it should be noted that since the structure in which the force applying member and the force transmitting portion are separately arranged is adopted, it is not necessary that the force applying member and the vertical part of the L-shaped rod 181 are completely collinear, and the Pressing the control end 53 inward will finally drive the first sub-sealing support 171 to move. Moreover, a contact head 182 is arranged at the top of the L-shaped rod 181, and the width of the contact head 182 is larger than the cross-section of the L-shaped rod 181, which can also increase the probability that the inner end of the force-applying member contacts the contact head 182. In addition, since the annular ridge portion 26 of the elastic seal has elasticity, regardless of whether the annular ridge portion 26 is compressed by 35% or 55%, the square boss portion 14 and the tapered boss portion can be realized. 15 and sealing of the annular rib 26. That is, when sealing is achieved, the number of rotations on the first female thread portion 410 and the mounting body end male thread portion 19 is not absolutely unique. When the irrigation system is not started, or the water supply pressure is low enough to deform the elastic seal 2, water cannot move downstream through the gap between the elastic seal 2 and the seal support.

As shown in FIG. 10 , when the irrigation system pressure increases to the rated working pressure, the first straight cylindrical portion 22 , the conical cylindrical portion 23 and the second straight cylindrical portion 24 of the elastic seal 2 are deformed, and the elastic seal 2 and the seal When there is a gap between the supports, water can pass through the installation body water inlet 11 and the installation body channel 12 of the support installation body 1, the sealing member water inlet end 21 and the first straight cylindrical portion of the elastic sealing member 2 in sequence as shown in the figure. 22. The conical cylindrical portion 23, the second straight cylindrical portion 24, the water outlet end 25 of the seal, and the casing outlet cylindrical portion 45 of the casing 4 finally flow out from the casing outlet end 46 of the casing 4. In addition, due to the elasticity of the urging member 5 , a seal can be formed with the driving through holes 49 , and water will not leak from between the driving through holes 49 . When the pressure of the irrigation system is reduced to below the rated working pressure, the elastic seal 2 restores its original state, and the sealing contact surface between the elastic seal 2 and the sealing support is restored. In addition, under the action of the exhaust of the exhaust hole 47 of the housing 4, the deformation of the elastic sealing member 2 will not be affected by the air pressure, and it can expand and contract freely.

As shown in FIG. 11 , when the water supply pipe network system and the stored water in the present invention need to be discharged in winter to avoid the temperature dropping to the freezing point, the expansion of the stored water will cause damage to the pipe network system and the present invention. The control end 53 is pressed downward toward the housing 4 as shown in the figure. At this time, the limiting end 51 and the connecting portion 52 of the force applying member 5 press the contact head 182 downward, and drive the contact head 182 to move downward, thereby driving the contact head 182 to move downward. The L-shaped rod 181 moves in the downward direction, and 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 supporting the mounting body 1 are separated to form a water flow gap, and the pipe network system and the stored water in the present invention can flow out in the direction of water flow as shown in the figure. When the stored water is exhausted, the control end 53 of the force applying member 5 is pulled upwards, so that the present invention can restore the anti-drip effect.

Embodiment 2:

This embodiment provides an irrigation system, including any one of the above-mentioned irrigation drip prevention devices.

Since the irrigation system provided in this aspect includes any of the above-mentioned irrigation drip-prevention devices, it has the technical effects of any of the above-mentioned irrigation drip-prevention devices, which will not be repeated here.

Due to the installation of a plurality of the above-mentioned anti-drip devices for irrigation, when the pressure in the pipeline is greater than enough to deform the elastic seal, each anti-drip device for irrigation will be opened almost at the same time, which significantly reduces the distance due to the different positions and the length of the pipeline. The difference in the starting time of each sprinkler or dripper caused by the difference is beneficial to improve the uniformity of irrigation.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; for example:

In the first embodiment, the force-applying member is slidably connected to the casing, which does not deny that the force-applying member and the casing can rotate relative to each other. In other words, the cross-sections of the connecting portion, the control end and the limiting end of the force-applying member may actually be circular or polygonal, which can be inserted into the driving through hole and can be inserted into the driving through hole as mentioned in the embodiment. Swipe in.

In the first embodiment, the side of the limiting end facing the inner wall of the casing is flat, and the overall limiting end is in the shape of a truncated cone. The tangent value of the angle formed in the length direction is greater than the friction coefficient of the first material at the limit end and the second material at the driving through hole of the casing, that is, a frictional self-locking is formed, and it is sufficient to prevent the force-applying member from being completely pulled out upward. .

In the first embodiment, two sub-sealing supports are provided. In fact, a plurality of sub-sealing supports, such as 3 or 4 sub-sealing supports, are provided, so that the inner thread of the housing and the outer thread of the supporting mounting body are screwed tightly. , there are more choices. Correspondingly, the number of the sub-supports is the same as that of the sub-sealing supports, and also changes with the change of the number of the sub-sealing supports.

In the first embodiment, a plurality of annular ridges are arranged on the peripheral surface of the control end. In fact, a plurality of bumps, or knurling, can also be arranged, which can also play the same role of increasing friction.

In the first embodiment, elastic sub-supports can be selected for the two sub-supports. This arrangement is to facilitate the uniformity of material selection, and at the same time, the force uniformity of the elastic seal in all directions is ensured without being driven by the drive assembly. In fact, when the above-mentioned further requirements are not considered, only the movable sub-support can be set as an elastic sub-support, and the other side has no corresponding elasticity.

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 above-mentioned L-shaped rod and the rib plate can also be directly replaced by a triangular plate, which can also play the same role. effect.

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 (10)

1. An anti-drip device for irrigation, characterized in that it comprises an elastic seal (2), a seal support and a drive assembly, wherein the elastic seal (2) is sleeved on the seal support, and the seal supports The component includes at least two sub-sealing supports that can move relatively, and the at least two sub-sealing supports can achieve sealing together with the elastic sealing member (2) when the elastic sealing member (2) is in a natural state, so The driving assembly is in driving connection with at least one of the sub-sealing supports, and the driving assembly is used for driving the sub-sealing supports to open to each other. 2. The anti-drip device for irrigation according to claim 1, characterized in that it further comprises a housing (4), wherein the elastic sealing member (2) and the sealing support member are located in the housing (4), The driving assembly includes a force applying member (5) and a force transmitting part that can be connected with the force applying member (5), the force applying member (5) can protrude from the housing (4), and the transmission The force portion is in driving connection with at least one of the sub-sealing supports, the force applying member (5) penetrates the driving through hole of the casing (4), and the force applying member (5) is connected to the casing (4). ) relative sliding settings. 3 . The anti-drip device for irrigation according to claim 2 , wherein the force transmission part is fixedly connected with the sub-sealing support. 4 . 4. The anti-drip device for irrigation according to claim 2 or 3, characterized in that, the force applying member (5) comprises a control end (53) and a connecting portion (52), and the control end (53) is located at the The outer side of the housing (4), the connecting portion (52) is fixedly connected with the control end (53), and when the control end (53) is pressed toward the housing (4), the The connecting part (52) can protrude from the housing (4) toward the inner side of the housing (4) and be in contact with the force transmission part. 5. The anti-drip device for irrigation according to claim 1, 2 or 3, further comprising a support member, the support member is connected with the sealing support member, and the support member comprises at least two sub-support members, At least one of the sub-supports is a movable sub-support (161), and the movable sub-support (161) is connected with at least one of the sub-sealing supports that are drivingly connected to the drive assembly, and the movable sub-support The member (161) is capable of relative movement with at least one of the sub-sealing support members not in driving connection with the drive assembly. 6. The drip-proof device for irrigation according to claim 5, wherein the movable sub-support (161) is an elastic sub-support, and the elastic deformation direction of the elastic sub-support is such that the sub-seal is The direction of the relative opening and closing of the support. 7. The anti-drip device for irrigation according to claim 1, 2, 3 or 6, wherein the sealing support is formed with a protruding portion in the radial direction of the elastic sealing member, and the outer diameter of the protruding portion is It is larger than the inner diameter of the part of the elastic seal and the seal support in a spontaneous state. 8. The anti-drip device for irrigation according to claim 2, 3 or 6, characterized in that, the part of the middle part of the casing (4) located on the radially outer side of the elastic seal is provided with a penetration through the casing body vent (47). 9. The drip-proof device for irrigation according to claim 2, 3 or 6, characterized in that it further comprises a support mounting body (1), and at least part of the sub-sealing supporter is opposite to the support mounting body (1) In a movable setting, the housing (4) directly or indirectly applies a force towards the support mounting body (1) to the elastic seal (2). 10 . An irrigation system, characterized in that, comprising the irrigation drip-proof device according to any one of claims 1 to 9 .

Images