Valve and irrigation system

Abstract

The utility model discloses a valve and an irrigation system, and relates to the technical field of sealing, the valve comprises a valve body, a valve core and a sealing piece, the valve core is arranged in a valve cavity of the valve body, the sealing piece comprises a sealing piece body, one side of the sealing piece body forms an installation portion used for being matched with the valve body of the valve in installation, and the valve core is arranged in the valve body. The other side of the sealing piece body is provided with a sealing protruding part protruding in the direction away from the installation part, the sealing protruding part is provided with a sealing face used for being matched with a valve element of the valve in a sealing mode, and in the actual application scene, the sealing face can abut against the valve element of the valve in a single-line sealing mode. Therefore, the sucker effect generated between the sealing element body and the valve element is effectively relieved, the torsion needed for controlling the valve element to rotate relative to the valve body is greatly reduced, the burden of the electric actuator is reduced, and the product cost and the risk of fault damage are correspondingly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a valve and an irrigation system. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and adjust and control parameters of the transported medium (such as temperature, pressure, and flow rate). To avoid the problem of leakage of the transported medium, a sealing component is provided between the valve body and the valve core.

[0003] In the related art, to ensure the sealing performance of the sealing component, a tight fit must be maintained between the sealing component and the valve core. However, in the prior art, the sealing between the seal and the valve core is often achieved through two-layer preloading. However, the two tight contacts will form a compression space between the preloading edge and the valve core. After the air in the compression space is compressed, a suction cup effect is generated, resulting in a very large starting torque every time the ball core rotates, far greater than the torque when the ball core rotates smoothly. This leads to a relatively large torque being required to rotate the valve core relative to the valve body. Moreover, the starting torque required for the valve core to rotate is much greater than the torque during the rotation process, which also causes the electric actuator used to control the rotation of the valve core to be unable to start normally and results in an overload damage phenomenon. If an electric actuator with a larger power is used, the cost of the valve will increase significantly, which is not conducive to large-scale use. Summary of the Utility Model

[0004] The purpose of the embodiments of the utility model is to provide a valve and an irrigation system to solve the problem of excessive torque required for the rotation of the valve core.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] In a first aspect, a valve is provided, including:

[0007] A valve body, which forms a hollow valve cavity;

[0008] A valve core, which is rotatably installed in the valve cavity;

[0009] A seal, which is arranged in the valve cavity;

[0010] The seal includes a seal body. One side of the seal body forms an installation part for installation and cooperation with the valve body. The other side of the seal body forms a sealing convex part protruding in a direction away from the installation part. The sealing convex part has a sealing surface for sealing cooperation with the valve core of the valve; the seal body is installed on the valve body through the installation part, and the seal body abuts against the valve core through the sealing surface of the sealing convex part.

[0011] As an alternative embodiment, a sealing sleeve is provided between the sealing member body and the inner wall of the valve cavity, and the sealing member body is in close contact with the sealing sleeve through the mounting portion.

[0012] As an alternative embodiment, the valve body is further provided with at least one water inlet pipe and a water outlet pipe communicating with the valve cavity, and the sealing member body is disposed around the valve cavity near the water inlet pipe and / or the water outlet pipe.

[0013] As an alternative embodiment, at the position where the transition between the water inlet pipe and the valve cavity and / or at the position where the transition between the water outlet pipe and the valve cavity in the valve body, there are annular convex portions protruding relative to the pipe wall, and a sealing sleeve groove is formed on the side of the annular convex portion facing the valve cavity;

[0014] At least a part of the sealing sleeve is disposed in the sealing sleeve groove.

[0015] As an alternative embodiment, the sealing convex portion gradually narrows from the end close to the sealing convex portion to the end away from the sealing convex portion.

[0016] As an alternative embodiment, the sealing surface is an arc surface.

[0017] As an alternative embodiment, the mounting portion includes:

[0018] A first mounting surface; and

[0019] A second mounting surface, and the second mounting surface is connected to the first mounting surface at an angle;

[0020] The position structure of the valve body for mounting the sealing member body is adapted to the mounting portion structure.

[0021] As an alternative embodiment, the mounting portion is further provided with a positioning groove with a notch located on the first mounting surface and / or the second mounting surface.

[0022] As an alternative embodiment, on the same cross-section of the sealing member body, an intersection is formed between the first mounting surface and the second mounting surface, and the intersection is located on the central extension line of the sealing convex portion.

[0023] As an alternative embodiment, the valve core is further provided with a valve stem protruding outside the valve body, and a first sealing ring is disposed between the valve stem and the valve body.

[0024] As an alternative embodiment, the valve core includes:

[0025] An inner ball core; and

[0026] The outer spherical core, and the outer spherical core is coated on the surface of the inner spherical core.

[0027] As an alternative embodiment, it further includes:

[0028] A control box, a first connection part is arranged on the control box, a second connection part adapted to the structure of the first connection part is correspondingly arranged on the valve body, and the control box is connected to the valve body through the first connection part and the second connection part.

[0029] In a second aspect, an irrigation system is provided, including:

[0030] An irrigation pipeline, and a valve as described in the first aspect, and the valve is arranged on the irrigation pipeline.

[0031] The beneficial effect of the present utility model is that: on one side of the seal body for cooperating with the valve core of the valve, a sealing convex part is convexly provided, so that in the actual application scenario, the sealing surface of the sealing convex part can be abutted against the valve core of the valve in a single-line sealing manner, thereby effectively alleviating the viscous effect between the seal body and the valve core, and greatly reducing the torque required to control the relative rotation of the valve core with respect to the valve body;

[0032] The single-line sealing method also avoids the situation of the sucker effect caused by the appearance of a cavity structure between the sealing surface and the surface of the valve core, reduces the static torque required at the initial stage of the rotation of the valve core, and realizes the effect that the static torque is basically equal to the dynamic torque, thereby reducing the burden on the electric actuator, and correspondingly reducing the product cost and the risk of failure and damage. Description of the Drawings

[0033] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0034] Figure 1 Schematic diagram of the valve structure of the prior art described in the embodiment of the present utility model;

[0035] Figure 2 Schematic diagram of the cooperation structure between the seal and the valve body described in the embodiment of the present utility model;

[0036] Figure 3 Schematic diagram of the front structure of the seal described in the embodiment of the present utility model;

[0037] Figure 4 Schematic diagram of the back structure of the seal described in the embodiment of the present utility model;

[0038] Figure 5 Schematic diagram of the valve structure (control box omitted) described in the embodiment of the present utility model;

[0039] Figure 6Schematic diagram of the valve body structure according to the embodiment of the present utility model;

[0040] Figure 7 Cross-sectional view of the valve according to the embodiment of the present utility model;

[0041] Figure 8 is Figure 7 enlarged view of part A;

[0042] Figure 9 Exploded view of the valve body and the valve core according to the embodiment of the present utility model;

[0043] Figure 10 One of the exploded views of the valve according to the embodiment of the present utility model;

[0044] Figure 11 Another exploded view of the valve according to the embodiment of the present utility model;

[0045] Figure 12 Exploded view of the valve core according to the embodiment of the present utility model;

[0046] Figure 13 Schematic diagram of the control box structure according to the embodiment of the present utility model;

[0047] Figure 14 Schematic diagram of the internal structure of the control box according to the embodiment of the present utility model;

[0048] Figure 15 Another schematic diagram of the valve structure according to the embodiment of the present utility model.

[0049] In the figure: 10, sealing member body; 11, mounting part; 111, first mounting surface; 112, second mounting surface; 113, positioning groove; 12, sealing convex part; 121, sealing surface; 20, valve body; 21, valve cavity; 22, water inlet pipe; 23, water outlet pipe; 24, second connecting part; 25, positioning block; 26, sealing sleeve; 27, ring convex part; 271, sealing sleeve groove; 30, valve core; 31, valve stem; 32, inner ball core; 33, outer ball core; 40, first sealing ring; 50, control box; 51, first connecting part; 52, transmission mechanism; 53, motor; 54, antenna; 60, cavity structure. Detailed implementation manners

[0050] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

[0051] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0053] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and regulate and control parameters of the transported medium (such as temperature, pressure, and flow rate). An electric gate valve is a type of gate valve, which is an automated device that uses an electric device to control the opening and closing of the valve and regulate the flow rate and pressure of the valve. It drives the valve core (valve flap) of the valve through an actuator (also known as an electric device) to achieve the opening, closing, regulation, and control of the valve.

[0054] As can be seen from the background art, in existing valve devices, a sealing component for maintaining the sealing performance of the valve is provided between the valve body and the valve core to prevent medium leakage. The sealing component is usually designed and selected according to the specific type of the valve, the working medium, and the working environment, but the basic sealing principle is the same, that is, to fill the gap between the valve body and the valve core to achieve the purpose of their sealing fit.

[0055] Specifically, the types of sealing components include but are not limited to gaskets, sealing rings, packing, etc.

[0056] From the above content, it can be understood that in order to ensure that the sealing component can provide stable and effective sealing performance between the valve body and the valve core, a tight fit state must be maintained between the sealing component and the valve core, and a tight fit relationship must be maintained between the sealing component and the valve body and the valve core at all times. And, as Figure 1As shown, the seal between the seal member and the valve core is often achieved through two layers of preloading. However, the two close contacts will form a compression space between the preloading edge and the valve core. After the air in the compression space is compressed, a suction cup effect is generated. As a result, every time the ball core rotates, the starting torque is very large, far greater than the torque when the ball core rotates smoothly. But this also leads to a large interaction force between the sealing component and the valve body and the valve core respectively, so that there is a large frictional force between the valve body and the sealing component and / or between the valve core and the sealing component, making it necessary to apply a large external torque to the valve core when it rotates relative to the valve body. Especially under certain specific sealing component structures, in order to ensure better sealing performance between the sealing component and the valve body and / or the valve core, a multi-point / multi-line sealing structure is adopted between any two of them, resulting in a cavity structure 60 between the sealing points / lines, leading to the generation of the "suction cup effect". Whether the valve core and the valve body are in a relatively static or relatively moving state, the sealing component will adsorb on the surface of the valve core like a "suction cup", thus further increasing the torque required for the valve core to rotate on the basis of increasing the frictional force between the two. The static torque of the valve core will also be much greater than the dynamic torque, ultimately resulting in the inability of the electric actuator used to control the rotation of the valve core to start normally and the phenomenon of overload damage.

[0057] To solve the above existing technical problems, the prior art generally uses an electric actuator with a larger power to apply a larger rotational torque to the valve core to overcome the above frictional force and "suction cup effect". However, the large-power electric actuator also leads to problems such as a significant increase in the cost of the valve and an increase in the volume of the valve equipment, which is not conducive to large-scale use.

[0058] In view of this, the present embodiment provides a valve, which improves the structure of the seal member inside it to solve a series of technical problems caused by the excessive torque required for the rotation of its valve core.

[0059] Please refer to the attached Figures 2 - 11 description. This valve includes a valve body 20 and a valve core 30. The specific structures of the valve body 20 and the valve core 30 can be adjusted adaptively according to the type of the valve. This embodiment does not make strict limitations and requirements on this, and it can be but not limited to ball valves, gate valves, globe valves, butterfly valves, etc.

[0060] In a general valve structure, a hollow valve cavity 21 is formed inside the valve body 20. The valve body 20 also opens at least one water inlet pipe 22 and a water outlet pipe 23 communicating with the valve cavity 21 according to the number of passages of the valve. And the valve core 30 is movably installed in the valve cavity 21 to adjust the on-off and opening degree of the water inlet pipe 22 and the water outlet pipe 23.

[0061] In addition, the valve further includes a seal, wherein the seal includes a seal body 10. The seal body 10 is a component in the valve for realizing the sealing function between the valve body 20 and the valve core 30. In the application scenario of the valve, the seal body 10 is arranged between the valve body 20 and the valve core 30 to prevent problems such as leakage of the conveyed medium or solid particles from the gap between the valve body 20 and the valve core 30. At the same time, it can also prevent external impurities such as dust and moisture from invading the interior of the valve, ensuring the normal operation of the valve and the purity of the fluid.

[0062] From the above content, it can be understood that the type of the seal body 10 can be adjusted according to aspects such as the valve type and the conveyed medium. In addition to including types such as gaskets, sealing rings, and packings, the seal body 10 can also be set as metal seal, soft seal, composite seal, etc. according to its sealing cooperation relationship with the valve core 30 and / or the valve body 20. This embodiment does not make specific limitations on this.

[0063] Specifically, an installation part 11 for installation and cooperation with the valve body 20 of the valve is formed on one side of the seal body 10. The structure of the installation part 11 can be determined according to the specific structure of the valve body 20. This embodiment does not make specific limitations on this for the time being, as long as it can ensure that the sealing performance between the seal body 10 and the valve body 20 is sufficient to meet the sealing requirements of the conveyed medium. And on the other side of the seal body 10, a part for forming a sealing cooperation with the valve core 30 of the valve is formed. The seal body 10 is fixedly arranged on the valve body 20 through the installation part 11. In this way, a relatively movable cooperation form needs to be set between the seal body 10 and the valve core 30. The structural form of the seal body 10 is diverse so that the seal body 10 and the valve core 30 can adapt to different sealing requirements and working environments. Among them, in order to ensure that relative movement can be realized between the valve core 30 and the seal body 10, a flange sealing method is generally adopted between the two for cooperation. That is, as shown in the appendix Figures 2 - 8 As shown, a sealing convex part 12 protruding in the direction away from the installation part 11 is formed on the other side of the seal body 10. The sealing convex part 12 has a sealing surface 121 for sealing cooperation with the valve core 30 of the valve. The sealing convex part 12 abuts against the surface of the valve core 30 through the sealing surface 121, so that a sealing barrier can be formed at the gap between the seal body 10 and the valve core 30 through the sealing convex part 12, thereby achieving the sealing purpose of preventing the conveyed medium from passing through.

[0064] It can be understood that the seal body 10 of this embodiment can adopt either a metal sealing material or a soft sealing material. In the embodiment using a metal sealing material, metal contact sealing is adopted between the seal body 10 and the valve core 30, so that when the valve core 30 is closed, it is in close contact with the seal body 10, forming an almost gapless metal barrier to prevent fluid from passing through. In the embodiment using a soft sealing material, the seal will adopt a soft sealing material (such as rubber, polytetrafluoroethylene, etc.). When the soft sealing material is pressed against the surface of the valve core 30 and is squeezed by the valve core 30 and the valve body 20, it can produce a certain deformation to fill the tiny gaps between the contact surfaces, thereby enhancing the sealing effect.

[0065] That is to say, the sealing convex part 12 and the surface of the valve core 30 generally adopt an interference fit assembly method to ensure that the fit relationship between the two is tight enough. Of course, the sealing method between the sealing component and the valve core 30 is not limited to this. The fit between the two can also but is not limited to clamping seals, thread seals, etc.

[0066] Please refer to the appendix Figure 6 、 Figure 8 , a sealing sleeve 26 is provided between the seal body 10 and the inner wall of the valve cavity 21. The seal body 10 is in close contact with the sealing sleeve 26 through its installation part 11. The presence of the sealing sleeve 26 can provide a positioning reference for the installation of the seal body 10 in the valve cavity 21, making the installation of the seal body 10 easier. At the same time, it can also provide a transmission channel for the interaction force between the valve body 20 and the valve core 30. The seal body 10 can abut against the sealing sleeve 26. When the valve core 30 is further assembled with the valve cavity 21 and abuts against the seal body 10, the seal body 10 can transmit the force from the valve core 30 to the valve body 20 through the sealing sleeve 26. Similarly, the valve body 20 can also transmit the corresponding reaction force to the seal body 10 through the sealing sleeve 26, and then transmit the reaction force to the valve core 30.

[0067] Furthermore, please continue to refer to the appendix Figures 5 - 11 , the valve body 20 is also provided with at least one water inlet pipe 22 and a water outlet pipe 23 communicating with the valve cavity 21. The seal body 10 is disposed around the valve cavity 21 near the water inlet pipe 22 and / or the water outlet pipe 23.

[0068] In the actual application scenario, sealing members 10 are provided between the water inlet pipe 22 and the valve cavity 21, and between the water outlet pipe 23 and the valve cavity 21 to prevent the transported medium from leaking out of the gaps between the valve body 20 and the valve core 30 into the water inlet pipe 22 and the water outlet pipe 23.

[0069] The valve provided by this embodiment can effectively reduce the frictional force between the valve body 20 and the valve core 30 by adopting the above-mentioned seal, and at the same time avoid the "suction cup effect" generated by the seal on the valve core 30, greatly reducing the static torque of the valve core 30, so that the torque required for the valve core 30 to start rotating and the torque required during the rotation process tend to be consistent, so as to reduce the burden on the electric actuator, make the adjustment accuracy of the valve core 30 higher, and effectively extend the service life of the valve.

[0070] On the basis of the above embodiment, a ring convex portion 27 protruding relative to the pipe wall is provided at the position where the water inlet pipe 22 and the valve cavity 21 transition in the valve body 20 and / or at the position where the water outlet pipe 23 and the valve cavity 21 transition. A seal sleeve groove 271 is formed on the side of the ring convex portion 27 facing the valve cavity 21. At least a part of the seal sleeve 26 is arranged in the seal sleeve groove 271. As Figure 5 , Figure 8 shown, the partial structure of the seal sleeve 26 for cooperating with the seal sleeve groove 271 is adapted to the structure of the seal sleeve groove 271, so that the seal sleeve 26 and the valve body 20 form a stable cooperation relationship.

[0071] The existence of the seal sleeve 26 can further improve the machining accuracy of the part of the valve body 20 for installing the seal body 10. At the same time, after machining the valve body 20, the structure of the seal sleeve 26 can be further machined on the valve body, and the material of the seal sleeve 26 can be selected according to the valve design requirements, so as to ensure the sealing effect of the valve body 20 by adopting a material with more excellent sealing performance to cooperate with the seal body 10.

[0072] Please refer to the appendix Figures 2 - 3, in this embodiment, the sealing convex portion 12 is arranged to gradually narrow from one end close to the sealing convex portion 12 to the end away from the sealing convex portion 12. In this way, in the metal sealing fit mode, the sealing convex portion 12 can reduce the contact surface between it and the valve core 30, thereby reducing the friction and wear between the two. In the soft sealing fit mode, as the interaction force between the sealing convex portion 12 and the valve core 30 gradually increases, the contact area between the sealing surface 121 and the surface of the valve core 30 will also increase with the deformation of the sealing convex portion 12. This can not only effectively control the contact area between the sealing surface 121 and the surface of the valve core 30 (depending on the gap size between the valve body 20 and the valve core 30 in the assembly requirements), so as to find a good balance between the sealing performance and the frictional force, enabling the sealing performance between the two to meet the requirements while minimizing the frictional force between the sealing member body 10 and the valve core 30 as much as possible, but also allows the sealing convex portion 12 to first cooperate with the surface of the valve core 30 through the end of the sealing convex portion 12 during the assembly process of the sealing convex portion 12 and the valve core 30, so that the two form a line contact relationship. And when the sealing convex portion 12 is further extruded as the assembly progresses, the sealing convex portion 12 and the valve core 30 are converted from a line contact relationship to a surface contact relationship. In this process, the contact surface between the sealing surface 121 and the surface of the valve core 30 expands outward from the line contact point. On the premise that no other parts of the sealing member body 10 are in contact with the valve core 30, the sealing surface 121 can effectively discharge the air between the sealing convex portion 12 and the valve core 30, thereby avoiding the problem of "suction cup effect" caused by the cavity structure 60 existing between the sealing member body 10 and the valve core 30.

[0073] By implementing the above embodiment, compared with the sealing structure of multi-point / multi-line sealing, the friction force generated between the sealing convex portion 12 of the present application and the valve core 30 is reduced by reducing the sealing contact surface to a certain extent. Moreover, by only arranging one sealing convex portion 12, a single-line sealing mode is formed between the sealing member body 10 and the valve core 30, effectively alleviating the sticking effect between the sealing member body 10 and the valve core 30. Thus, while significantly reducing the torque required to control the rotation of the valve core 30 relative to the valve body 20, it also avoids the situation of "suction cup effect" caused by the cavity structure 60 between the sealing surface 121 and the surface of the valve core 30, reduces the static torque required at the initial stage of the rotation of the valve core 30, realizes the effect that the static torque is basically equal to the dynamic torque, thereby reducing the burden on the electric actuator, and correspondingly reducing the product cost and the risk of failure and damage.

[0074] Since the friction between the seal body 10 and the valve core 30 is effectively controlled, the static torque of the valve core 30 also tends to be related to its dynamic torque. The valve can also correspondingly adopt an electric actuator with a smaller power. In addition to reducing the production cost and use cost of the valve, it also makes the valve structure more compact, which is conducive to the miniaturization design of the pipeline system.

[0075] In one embodiment, on the basis of the above structural limitations, the sealing surface 121 can be but is not limited to being set as an arc surface. That is, in the cross-sectional shape of the sealing convex portion 12, the sealing surface 121 forms an approximate "⌒" shape on the sealing convex portion 12. The arc surface design can make the contact between the sealing ring and the surface of the valve core 30 more uniform and tight, effectively reducing the possibility of leakage. In contrast, the sharp corner design may have gaps at some positions between the sealing convex portion 12 and the valve core 30, resulting in leakage problems between the two.

[0076] Specifically, the arc-shaped sealing surface 121 can better adapt to deformation situations such as eccentricity, vibration, and torsion. While maintaining a stable sealing effect, the arc surface design can also make the contact between the sealing convex portion 12 and the surface of the valve core 30 smoother, improving the lubrication condition of the seal body 10, thereby reducing the friction between the seal body 10 and the valve core 30, helping to reduce friction losses, and improving the working efficiency of the electric actuator.

[0077] Of course, in other embodiments, the sealing surface 121 can also be set as the above-mentioned sharp corner shape in the cross-sectional shape of the sealing convex portion 12, that is, an approximate "^" shape, and there are no strict limitations and requirements in other embodiments.

[0078] As an alternative embodiment, the installation part 11 includes a first installation surface 111 and a second installation surface 112. Herein, the first installation surface 111 and the second installation surface 112 are connected at an angle, that is, the intersection line (or boundary) between the first installation surface 111 and the second installation surface 112 forms an included angle. When the seal body 10 forms an assembly relationship with the valve body 20 through the installation part 11, the installation part 11 abuts against the inner side surface of the valve body 20 through the first installation surface 111 and the second installation surface 112. Correspondingly, the structure of the part of the valve body 20 for providing the abutment of the installation part 11 should also be set to a structural form adapted to the first installation surface 111 and the second installation surface 112, so as to effectively ensure the contact area between the two, improve the sealing performance between the seal body 10 and the valve body 20, and at the same time, the first installation surface 111 and the second installation surface 112 with an included angle fit can also improve the installation stability between the seal body 10 and the valve body 20. The first installation surface 111 and the second installation surface 112 can respectively effectively restrict two moving directions of the seal body 10, so that the seal body 10 has a certain positioning function during the assembly process and a limiting function after assembly, reducing the situation that the seal body 10 moves relative to the valve body 20, thereby ensuring that the subsequent valve core 30 with higher assembly requirements can have a higher assembly accuracy with the seal body 10, so as to achieve the purpose of reducing the torque of the valve core 30.

[0079] In this example, as Figures 2 - 8 shown, the included angle α between the first installation surface 111 and the second installation surface 112 is set to ≥ 90°, so as to facilitate the machining of the position of the valve body 20 for cooperating with the installation part 11, and avoid the part of the seal body 10 for arranging the first installation surface 111 and the second installation surface 112 from contacting the valve core 30 due to too small an included angle, thus causing the problem of "suction cup effect". Of course, the included angle α between the first installation surface 111 and the second installation surface 112 should not be set too large either. An overly large included angle will reduce the positioning accuracy of the first installation surface 111 and the second installation surface 112 on the inner side of the valve body 20, thereby causing the situation that the seal body 10 moves relative to the valve body 20 during the assembly process and in the assembled state, affecting the sealing performance of the valve.

[0080] As Figure 4 、 Figure 8 shown, the first installation surface 111 and the second installation surface 112 can be but are not limited to being set as a planar structure, and they can also be an arc surface, a step or a groove structure, etc.

[0081] Please continue to refer to the appendix Figure 2, based on the above embodiments, in order to improve the assembly strength between the seal and the valve body 20 in the application scenario of the valve, the mounting portion 11 of the present embodiment is further provided with a positioning groove 113, and the positioning groove 113 is used to cooperate with the matching positioning block 25 on the valve body 20, so that the seal body 10 can be clamped on the valve body 20 through the mounting portion 11, ensuring that there is no problem of displacement between the seal body 10 and the valve body 20 before and after the assembly of the valve core 30, and ensuring the sealing performance between the valve body 20 and the valve core 30.

[0082] Specifically, in the application scenario of the valve, a positioning block 25 adapted to the position and structure of the positioning groove 113 is convexly provided on the cavity wall of the valve cavity 21 formed inside the valve. The positioning groove 113 on the mounting portion 11 can adopt any of the following structural forms:

[0083] I. The positioning groove 113 is provided in the portion of the mounting portion 11 for forming the first mounting surface 111, and the notch of the positioning groove 113 is opened on the first mounting surface 111;

[0084] II. The positioning groove 113 is provided in the portion of the mounting portion 11 for forming the second mounting surface 112, and the notch of the positioning groove 113 is opened on the second mounting surface 112;

[0085] III. The positioning grooves 113 are respectively provided in the portions of the mounting portion 11 for forming the first mounting surface 111 and the second mounting surface 112, and the notches of the positioning grooves 113 are correspondingly opened on the first mounting surface 111 and the second mounting surface 112.

[0086] In addition, the cooperation between the positioning groove 113 and the positioning block 25 can not only improve the positioning accuracy between the seal body 10 and the valve body 20, but also indirectly improve the structural strength of the seal body 10 in the mounting portion 11 because the positioning groove 113 provides a space for the positioning block 25 to extend into the mounting portion 11. Therefore, it helps to improve the resilience performance of the sealing convex portion 12, achieving the purpose of improving the sealing strength between the sealing convex portion 12 and the valve core 30.

[0087] Please refer to the appendix Figure 2 , in the above embodiment where the mounting portion 11 includes the first mounting surface 111 and the second mounting surface 112, on the same cross-section of the seal body 10, it can be seen that there is an intersection point P formed between the line segment formed by the first mounting surface 111 and the line segment formed by the second mounting surface 112. The intersection point P is located on the central extension line of the sealing convex portion 12, so that the forces on both sides of the sealing convex portion 12 and both sides of the mounting portion 11 are more balanced, ensuring the sealing effect.

[0088] In one embodiment, based on the implementation mode that the above-mentioned installation part 11 is provided with a positioning groove 113, and the opening of the positioning groove 113 is opened on the first installation surface 111 or the second installation surface 112, or two positioning grooves 113 are opened in the positioning groove 113, and the openings of the two positioning grooves 113 are respectively opened on the first installation surface 111 and the second installation surface 112, the central extension line L1 of the sealing convex part 12 passes through the positioning groove 113. In this way, in the state where the sealing convex part 12 is deformed under pressure, when the mutual force applied by the valve core 30 and the valve core 30 through the sealing element body 10 passes through the central extension line L1, the forces on both sides of the sealing convex part 12 and the installation part 11 are more evenly balanced, ensuring the assembly stability between the sealing element body 10 and the valve body 20 and between the sealing element body 10 and the valve core 30, and ensuring that the sealing effect between components meets the use requirements of the valve.

[0089] In one embodiment, the valve core 30 is further provided with a valve stem 31 protruding outside the valve body 20, and the valve stem 31 is used to provide a connection position for the electric actuator (such as the motor 53) to connect with the valve core 30. Due to the relationship that the valve core 30 is provided with the valve stem 31 extending out of the valve body 20, the gap between the valve stem 31 and the valve core 30 will also be exposed outside the valve. In order to avoid the leakage of the conveying medium between the valve stem 31 and the valve body 20, a first sealing ring 40 should also be provided between the valve stem 31 and the valve body 20.

[0090] It should be understood that the valve body 20 is provided with an opening for the valve stem 31 to extend out. The first sealing ring 40 is arranged around the valve stem 31 so that its inner side abuts against the surface of the valve stem 31. At the same time, the outer side surface of the first sealing ring 40 can abut against the surface of the opening of the valve body 20. Moreover, the structure of the sealing element provided in this embodiment can also be adopted between the sealing ring and the valve body 20 to avoid the problem of "suction cup effect" between the sealing element and the valve stem 31 and / or the valve body 20, so as to ensure that the valve core 30 can be driven smoothly.

[0091] In one embodiment, please refer to the appendix Figure 12 , the valve core 30 includes an inner ball core 32 and an outer ball core 33. The inner ball core 32 and the outer ball core 33 can be combined into an integral valve core 30 through secondary processing, and it can be specifically processed by secondary casting, secondary injection molding, secondary 3D printing and other methods.

[0092] After machining the inner ball core 32, since the structural dimensions of the inner ball core 32 approach the dimensional requirements of the valve core 30, the machining allowance between the inner ball core 32 and the valve body 20 will become more controllable. Therefore, by machining the outer ball core 33 covering the inner ball core 32 on the basis of the inner ball core 32 through secondary machining, during the machining process, the roundness of the outer ball core 33 can be ensured by adjusting the positional relationship between the outer ball core 33 and the inner ball core 32 and the thickness of each part of the outer ball core 33. Moreover, in the embodiment where the valve core 30 is provided with a valve stem 31, the outer ball core 33 with higher machining accuracy can also ensure that its center point is located on the rotation axis of the valve stem 31. Thus, in the final assembled state, the distances between the surfaces of the valve core 30 and the valve body 20 more conform to the assembly requirements, and at the same time, the interaction forces between the surfaces of the valve core 30 and the seal are more stable, ensuring the sealing performance of the valve.

[0093] In one embodiment, the valve further includes a control box 50. As Figures 13 - 15 shown, a first connection part 51 is provided on the control box 50. Correspondingly, a second connection part 24 adapted to the structure of the first connection part 51 is provided on the valve body 20. The control box 50 and the valve body 20 are installed and fitted through the first connection part 51 and the second connection part 24. For example, both the first connection part 51 and the second connection part 24 can be connection holes, and the control box 50 and the valve body 20 can be connected by passing fasteners through the connection holes; alternatively, the control box 50 and the valve body 20 can also be snap-connected through the first connection part 51 and the second connection part 24.

[0094] A transmission mechanism 52 is provided inside the control box 50. The transmission mechanism 52 can be, but is not limited to, a gear set. The valve core 30 is in transmission connection with the transmission mechanism 52 through the valve stem 31, and further, by providing a driving device such as a motor 53 on the control box 50 that is in transmission connection with the transmission mechanism 52, the control box 50 is enabled to have the function of controlling the rotation of the valve core 30.

[0095] In one embodiment, in order to accurately collect the water pressure around each valve, an antenna 54 is also provided on the valve. The antenna 54 can be provided on the control box 50 covering the outside of the valve. The terminal device can send control signals to the corresponding valve through the antenna 54 to adjust and control the state of the valve core 30.

[0096] In addition, this embodiment also provides an irrigation system, which includes an irrigation pipeline and the valve according to any of the above embodiments. The valve is arranged on the irrigation pipeline to control the on-off of the irrigation pipeline and the flow direction of the conveying medium in the irrigation pipeline.

[0097] In the description of this article, it should be understood that the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0098] In the description of this specification, the description referring to terms such as "one embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0099] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0100] The technical principle of the present utility model has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present utility model and cannot be construed as a limitation to the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can readily conceive of other specific implementation manners of the present utility model without creative efforts, and these manners will fall within the protection scope of the present utility model.

Claims

1. A valve, characterized in that, Comprising: A valve body (20) formed with a hollow valve cavity (21); A valve core (30) rotatably installed in the valve cavity (21); A seal, disposed in the valve cavity (21); The seal includes a seal body (10). One side of the seal body (10) forms a mounting portion (11) for mounting and cooperating with the valve body (20). The other side of the seal body (10) forms a sealing convex portion (12) protruding in a direction away from the mounting portion (11). The sealing convex portion (12) has a sealing surface (121) for sealing cooperation with the valve core (30) of the valve. The seal body (10) is installed on the valve body (20) through the mounting portion (11), and the seal body (10) abuts against the valve core (30) through the sealing surface (121) of the sealing convex portion (12).

2. The valve according to claim 1, characterized in that, A seal sleeve (26) is provided between the seal body (10) and the inner wall of the valve cavity (21), and the seal body (10) is in close contact with the seal sleeve (26) through the mounting portion (11).

3. The valve according to claim 2, characterized in that, The valve body (20) is further provided with at least one water inlet pipe (22) and a water outlet pipe (23) communicating with the valve cavity (21). The seal body (10) is disposed around the valve cavity (21) at a position close to the water inlet pipe (22) and / or the water outlet pipe (23).

4. The valve according to claim 3, characterized in that, At a position where the valve body (20) transitions between the water inlet pipe (22) and the valve cavity (21) and / or at a position where the water outlet pipe (23) transitions between the valve cavity (21), there is a ring convex portion (27) protruding relative to the pipe wall. A seal sleeve groove (271) is formed on one side of the ring convex portion (27) facing the valve cavity (21). At least a part of the seal sleeve (26) is disposed in the seal sleeve groove (271).

5. The valve according to claim 1, characterized in that, The sealing convex portion (12) gradually narrows from one end close to the sealing convex portion (12) to the other end away from the sealing convex portion (12).

6. The valve according to claim 5, characterized in that, The sealing surface (121) is an arc surface.

7. The valve according to any one of claims 1-6, characterized in that, The mounting portion (11) includes: A first mounting surface (111); and A second mounting surface (112) angularly connected to the first mounting surface (111); The position structure of the valve body (20) for mounting the seal body (10) is adapted to the structure of the mounting portion (11).

8. The valve according to claim 7, characterized in that, The mounting portion (11) is further provided with a positioning groove (113) with a notch located on the first mounting surface (111) and / or the second mounting surface (112).

9. The valve according to claim 7, characterized in that, On the same cross-section of the seal body (10), an intersection is formed between the first mounting surface (111) and the second mounting surface (112), and the intersection is located on the central extension line of the sealing convex portion (12).

10. The valve according to claim 1, characterized in that, The valve core (30) is further provided with a valve stem (31) protruding outside the valve body (20), and a first sealing ring (40) is provided between the valve stem (31) and the valve body (20).

11. The valve according to claim 1, characterized in that, The valve core (30) includes: Inner ball core (32); and an outer ball core (33), wherein the outer ball core (33) covers the surface of the inner ball core (32).

12. The valve according to claim 1, characterized in that, Further comprising: A control box (50) provided with a first connecting portion (51) thereon, and the valve body (20) is correspondingly provided with a second connecting portion (24) having a structure adapted to that of the first connecting portion (51), and the control box (50) is connected to the valve body (20) through the first connecting portion (51) and the second connecting portion (24).

13. An irrigation system, characterized in that, Comprising: An irrigation pipeline, and a valve according to any one of claims 1-12, wherein the valve is provided on the irrigation pipeline.

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