Electromagnetic valve and irrigation system

Abstract

The invention provides an electromagnetic valve and an irrigation system. According to the electromagnetic valve, a communicating cavity, a water inlet channel and a water outlet channel are formed by combining a coil framework and a valve body, a lower iron sheet is arranged in a diaphragm, an upper iron sheet is arranged on the coil framework, a core column made of a magnet material is adopted, and a coil is powered on through a controller to control the core column to ascend and descend; when the valve is switched to be opened and closed, the coil is electrified, the driving core column descends to be adsorbed with the lower iron sheet or the driving core column ascends to be adsorbed with the upper iron sheet, electrification can be stopped, the valve can be opened by adopting low voltage, the valve opening performance is optimized, the power consumption is reduced, and the cruising ability is improved.

Description

Technical Field

[0001] The present application relates to the field of solenoid valves, and in particular to a solenoid valve and an irrigation system. Background Art

[0002] The solenoid valve is mainly composed of a valve body, a solenoid coil, an armature (movable iron core), a valve core, a spring, a seal and a fluid channel. The valve body is used as a shell to carry the internal components. The solenoid coil is wound around the static iron core and generates a magnetic field when energized. The armature is connected to the valve core and can move axially in the guide structure. The valve core cooperates with the valve seat through the seal to control the opening and closing of the channel, and the spring is used to reset when the power is off. The principle of the switch valve is based on the electromagnetic effect: when the coil is energized, the magnetic field drives the armature to drive the valve core to overcome the spring force and move, so that the valve core is separated from the valve seat and the fluid channel is opened; after the power is off, the magnetic field disappears, the spring pushes the armature to reset, and the valve core presses the valve seat to block the fluid. The normally closed solenoid valve is closed by default and opens when energized; the normally open type is the opposite, and the precise on-off control of the fluid is achieved through the interaction between magnetic force and mechanical force.

[0003] Existing solenoid valves are difficult to open under high water pressure conditions. Excessive water pressure will increase the pressure difference between the valve core and the valve seat, and the resistance to the movement of the valve core will increase, causing the electromagnetic coil to generate a stronger magnetic force to drive the armature and the valve core. If the electromagnetic force is not enough to overcome the water pressure resistance, it will be difficult or impossible to open the valve. If the electromagnetic force is increased to maintain the normal valve opening ability, the coil current needs to be increased, resulting in increased power consumption and reduced battery life. Or, if the coil is enlarged, the overall size will increase and the cost will increase. Summary of the invention

[0004] In view of the above problems, the present application provides a solenoid valve and an irrigation system.

[0005] To achieve the above object, the inventor provides a solenoid valve, comprising:

[0006] A valve body, wherein the valve body is provided with a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are connected through a connecting cavity;

[0007] A diaphragm, the diaphragm cover is arranged at the water outlet end of the water inlet channel and the water inlet end of the water outlet channel, and the diaphragm is provided with a first through hole and a second through hole;

[0008] A lower iron sheet, the lower iron sheet being arranged at the bottom or inside of the diaphragm;

[0009] A coil frame, wherein the coil frame is detachably fixedly connected to the valve body to form the communicating cavity, and a core cavity is provided inside the coil frame;

[0010] A core column, which is made of a magnetic material and is slidably disposed in the core cavity;

[0011] A coil, wherein the coil ring is arranged outside the coil frame;

[0012] An upper iron sheet, the upper iron sheet being arranged on the upper surface of the coil frame;

[0013] A controller is electrically connected to the coil, and the coil is energized by the controller to drive the core column to rise or fall.

[0014] Different from the prior art, the above technical solution forms a connecting cavity, a water inlet channel and a water outlet channel by combining a coil skeleton and a valve body, arranges a lower iron sheet in the diaphragm, arranges an upper iron sheet on the coil skeleton, adopts a core column made of a magnetic material, and controls the rise and fall of the core column by energizing the coil through a controller. It only needs to energize the coil when switching between the open and closed valve states, drive the core column to descend to be adsorbed with the lower iron sheet, or drive the core column to rise and be adsorbed with the upper iron sheet to stop energizing. The valve can be opened with a low voltage, which optimizes the valve opening performance, reduces power consumption, and improves endurance.

[0015] In some embodiments, a detachably connected stem cover and a stem shell are further included, the stem is arranged in a space formed by the connection of the stem cover and the stem shell, and the core cavity is adapted to the stem shell. The combination of the stem cover and the stem shell forms a closed space to protect the stem, thereby extending the service life of the stem.

[0016] In some embodiments, a frame cover is further included, and the frame cover is arranged on the top of the coil frame to fix the upper iron sheet. Such a design firmly fixes the upper iron sheet on the coil frame, improves stability, and increases the service life of the upper iron sheet.

[0017] In some embodiments, the diaphragm is circular; and / or the diaphragm is a rubber diaphragm.

[0018] In some embodiments, the lower part of the coil frame is provided with an external thread, the upper part of the valve body is provided with an internal thread, and the coil frame is threadedly connected to the valve body. Such a connection method is convenient for assembly and can provide sufficient connection strength.

[0019] In some embodiments, after the coil frame is threadedly connected to the valve body, the edge of the diaphragm is clamped between the lower edge of the coil frame and the valve body. In these embodiments, the stability of the diaphragm is effectively improved.

[0020] In some embodiments, the diaphragm includes: a water outlet area, the first through hole is arranged on the water outlet area; a water inlet area, the water inlet area is arranged around the water outlet area, and the second through hole is arranged on the water inlet area, the aperture of the second through hole is smaller than the aperture of the first through hole; an elastic area, the elastic area is arranged around the water inlet area, and the thickness of the elastic area is smaller than the thickness of the water inlet area; a fixed area, the fixed area is arranged around the elastic area; wherein the water outlet area, the water inlet area, the elastic member and the fixed area are integrally formed. By arranging the second through hole on the water inlet area, it is avoided that when the diaphragm is clamped and fixed, the second through hole is deformed when the upper and lower surfaces of the diaphragm rotate in different directions. At the same time, by setting the elastic area, it is convenient for the water outlet area and the water inlet area to move up and down along the axial direction of the diaphragm.

[0021] In some embodiments, the membrane includes: the first through hole is placed in the center of the water outlet area. Such a design facilitates the control of the state of the membrane, that is, to avoid the outer edge away from the first through hole from tilting when the first through hole in the water outlet area is pressed.

[0022] In some embodiments, the aperture of the second through hole is larger than the aperture of the second through hole. In these embodiments, when the pressure above the diaphragm decreases, the water inlet area will be lifted up so that water can directly pass over the diaphragm.

[0023] The present invention also provides an irrigation system, comprising: a water inlet pipe and a solar water pump connected to each other, wherein the solar water pump is provided with a solenoid valve as described in any one of the above technical solutions.

[0024] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present invention and other related contents, and shall not be considered as limiting the present application.

[0026] In the drawings of the specification:

[0027] Figure 1 It is a structural cross-sectional view of the solenoid valve in the specific implementation mode in the valve opening state;

[0028] Figure 2 It is a structural cross-sectional view of the solenoid valve in a closed valve state described in a specific implementation manner;

[0029] Figure 3 It is a three-dimensional exploded view of a part of the structure of the solenoid valve described in the specific implementation method;

[0030] Figure 4 It is a structural stereogram of the coil skeleton and the valve body after being connected in the specific implementation mode;

[0031] Figure 5 It is a structural cross-sectional view of the diaphragm and the lower iron sheet in another specific implementation manner.

[0032] The reference numerals in the above drawings are described as follows:

[0033] 10. Valve body; 101. Water inlet channel; 102. Water outlet channel; 103. Connecting cavity; 20. Diaphragm; 201. First through hole; 202. Second through hole; 30. Lower iron sheet; 40. Coil skeleton; 50. Core column; 60. Coil; 70. Upper iron sheet; 80. Controller; 90. Core column cover; 91. Core column shell; 92. Pointed head; 93. Skeleton cover; 94. Water outlet area; 95. Water inlet area; 96. Elastic area; 97. Fixed area. DETAILED DESCRIPTION

[0034] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0036] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0037] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0038] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0039] Without further limitations, in this application, the words "include", "comprises", "has" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0041] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a direct connection, or an indirect connection through an intermediate medium; it can be a relationship in which two components are combined together, or an interaction relationship between two components, or a connection between the insides of two structures. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] See also Figures 1 to 5 , this embodiment provides a solenoid valve, comprising:

[0044] The valve body 10 is provided with a water inlet channel 101 and a water outlet channel 102, and the water inlet channel 101 and the water outlet channel 102 are connected through a connecting cavity 103. The material of the valve body 10 is usually selected according to the application scenario, and common ones are brass, stainless steel, engineering plastics (such as PVC, PP), etc. Brass is corrosion-resistant and has strong pressure-bearing capacity, and is suitable for conventional water and gas systems; stainless steel is suitable for high temperature, strong corrosion or high cleanliness requirements; engineering plastics are used for low pressure or chemically corrosive media, and have the advantage of lightweight. Structurally, the valve body 10 contains a water inlet channel 101 and a water outlet channel 102. The water outlet channel 102 is generally adapted to the diaphragm 20 and the stem 50 in the valve body 10. For example, the diaphragm 20 is horizontally arranged at the center of the valve body 10, and the stem 50 is correspondingly arranged directly above the diaphragm 20, and the water outlet channel 102 is arranged below the diaphragm 20. The water outlet end of the water outlet channel 102 can be arranged on one side or below the bottom of the valve body 10, and connected to the downstream pipeline to ensure directional output of the fluid. The water inlet channel 101 is spaced apart from the water outlet channel 102, and its water inlet end can be arranged on the opposite side or above the bottom of the valve body 10, connected to the water source through an interface, and a filter can be arranged inside to prevent impurities from entering.

[0045] The diaphragm 20 is covered at the water outlet end of the water inlet channel 101 and the water inlet end of the water outlet channel 102. The diaphragm 20 is provided with a first through hole 201 and a second through hole 202. The first through hole 201 is located above the water inlet end of the water outlet channel 102, and the second through hole 202 is located above the water outlet end of the water inlet channel 101. The fluid enters the communication cavity 103 from the water inlet channel 101 through the second through hole 202, that is, the water inlet channel 101 is connected with the communication cavity 103 through the second through hole 202, and the communication cavity 103 is connected with the water outlet channel 102 through the first through hole 201. The fluid enters the water outlet channel 102 from the communication cavity 103 through the first through hole 201, so as to realize the connection between the water inlet channel 101, the communication cavity 103 and the water outlet channel 102. Preferably, the diaphragm 20 is circular, and the diaphragm 20 is a rubber diaphragm 20.

[0046] The lower iron sheet 30 is arranged at the bottom or inside of the diaphragm 20. The lower iron sheet 30 can be buried inside the diaphragm 20 and has a funnel-like shape. It can also be fixed to the bottom of the diaphragm 20. The lower iron sheet 30 is used to generate a magnetic attraction force with the stem 50, so that the stem 50 and the diaphragm 20 fit tightly and block the first through hole 201, so that the water pressure in the communication cavity 103 rises suddenly to close the diaphragm 20 downward to close the valve.

[0047] The coil frame 40 can be made of plastic material. The coil frame 40 is connected with the valve body 10 to form the connecting cavity 103, that is, the lower part of the coil frame 40 and the upper part of the valve body 10 enclose the connecting cavity 103 to form a closed space. The connecting cavity 103 is used to connect the water inlet channel 101 and the water outlet channel 102 respectively. A movable valve core, a diaphragm 20, etc. are arranged therein, and the on-off control of the fluid is realized by opening and closing the connecting cavity 103. A pressure balance hole can be arranged in the connecting cavity 103 to reduce the resistance of the valve core movement and ensure a quick response. A core cavity is arranged inside the coil frame 40.

[0048] The core column 50 is made of a magnetic material and is slidably disposed in the core cavity. The core column 50 can slide from the core cavity into the connecting cavity 103. The internal space of the core cavity is adapted to the size of the core column 50, that is, the core column 50 can be slidably embedded in the core cavity. The sliding track of the core column 50 is limited by the core cavity, so that it can slide stably on a preset track. The bottom of the core column 50 can be provided with a pointed head 92, which is used to block the first through hole 201 of the diaphragm 20.

[0049] The coil 60 is arranged on the outside of the coil frame 40. The magnetic force generated by the coil 60 after being energized is used to drive the core column 50 to rise or fall. The principle is as follows: after the coil 60 is energized, the current passes through the winding to generate a circular magnetic field, and its strength is proportional to the current. The magnetic field acts on the core column 50, causing it to move upward (or downward) driven by the magnetic attraction, thereby changing the position of the core column 50.

[0050] The upper iron sheet 70 is arranged on the top of the coil skeleton 40. The upper iron sheet 70 is not in direct contact with the core column 50, and the two are physically isolated by the coil skeleton 40. The upper iron sheet 70 is used to produce a magnetic attraction with the core column 50, so that the core column 50 can be stably adsorbed in the core cavity to keep the first through hole 201 open, that is, when the core column 50 rises, it can be attracted by the upper iron sheet 70, the first through hole 201 of the diaphragm 20 is opened, the water pressure in the connecting cavity 103 drops suddenly, and the water pressure of the water inlet channel 101 lifts the diaphragm 20 to open the valve.

[0051] The controller 80 is electrically connected to the coil 60, and the coil 60 is energized by the controller 80 to drive the stem 50 to rise or fall. The controller 80 can refer to the device used in the existing solenoid valve to control the energization of the coil 60, including but not limited to the driving device, the integrated driving module and the auxiliary components. It only needs to be able to realize the bidirectional energization of the coil 60.

[0052] The working principle of the solenoid valve is as follows: when the solenoid valve is in the valve closing state, since the lower iron sheet 30 is buried in the diaphragm 20, the diaphragm 20 is fixed in the valve body 10, and the stem 50 is tightly adsorbed by the lower iron sheet 30, and at the same time blocks the first through hole 201 on the diaphragm 20. At this time, the water pressure in the connecting cavity 103 in the valve body 10 increases, and the diaphragm 20 is located at the bottom of the connecting cavity 103 and is pushed down by the water pressure. At this time, the water inlet channel 101 is isolated from the water outlet channel 102, and water cannot flow through. When the solenoid valve needs to be converted from the valve closing state to the valve opening state, the coil 60 is energized through the controller 80, so that the coil 60 generates a current that can push the stem 50 upward. The driven magnetic field, the magnetic field force exerted on the core column 50 only needs to be sufficient to separate it from the lower iron sheet 30 and rise to a height sufficient to produce an adsorption effect with the upper iron sheet 70, and the controller 80 can stop energizing the coil 60. At this time, since the upper iron sheet 70 is fixed on the top of the coil skeleton 40, the core column 50 is fixed in the core cavity under the action of the magnetic force. At this time, the first through hole 201 is opened, and the connecting cavity 103 is connected to the water outlet channel 102 through the first through hole 201. The water pressure in the connecting cavity 103 drops suddenly, and the water pressure in the water inlet channel 101 lifts the diaphragm 20, and the water flows from the water inlet channel 101 to the water outlet channel 102, and the solenoid valve switches to the open valve state.

[0053] The present invention forms a connecting cavity 103, a water inlet channel 101 and a water outlet channel 102 by combining a coil skeleton 40 with a valve body 10, arranges a lower iron sheet 30 in the diaphragm 20, arranges an upper iron sheet 70 on the coil skeleton 40, adopts a core column 50 made of a magnetic material, and controls the rise and fall of the core column 50 by energizing the coil 60 through a controller 80. It only needs to energize the coil 60 when switching between the valve opening and valve closing states, drive the core column 50 to descend to be adsorbed with the lower iron sheet 30, or drive the core column 50 to rise and be adsorbed with the upper iron sheet 70 to stop energizing. The valve can be opened with a low voltage, thereby optimizing the valve opening performance, reducing power consumption, and improving endurance.

[0054] Since the magnet is immersed in water for a long time, it will mainly cause the magnet to rust, and may also cause weak magnetization of water. In order to prevent the magnet from losing its magnetic effect, which will cause the solenoid valve to fail to work properly, in some embodiments, a detachably connected stem cover 90 and a stem shell 91 are also included. The stem 50 is arranged in the space formed after the stem cover 90 and the stem 50 shell 91 are connected, and the core cavity is adapted to the stem shell 91. The stem cover 90 and the stem shell 91 are tightly connected, and the bottom of the stem shell 91 can also be provided with a pointed head 92 for blocking the first through hole 201. The stem cover 90 and the stem shell 91 can both be made of a material that does not affect the magnetic force, such as a plastic material. The stem cover 90 and the stem shell 91 are combined to form a closed space to protect the stem 50, thereby extending the service life of the stem 50.

[0055] The upper iron sheet 70 is easily corroded by moisture and impurities in the air due to long-term exposure to the air, which causes the upper iron sheet 70 to rust and lose the magnetic adsorption function with the core column 50, thereby causing the core column 50 to be unable to be adsorbed in the core cavity, affecting the valve opening performance of the solenoid valve. Therefore, in some embodiments, a skeleton cover 93 is also included, and the skeleton cover 93 is covered on the top of the coil skeleton 40 to fix the upper iron sheet 70. The skeleton cover 93 is tightly connected to the coil skeleton 40. When the skeleton cover 93 is covered on the top of the coil skeleton 40, the upper iron sheet 70 is firmly fixed on the coil skeleton 40, thereby improving stability and increasing the service life of the upper iron sheet 70.

[0056] The coil skeleton 40 and the valve body 10 are detachably fixedly connected, and the two can be connected by a snap-fit ​​structure, a buckle structure, etc., and a waterproof gasket can be provided at the connection to achieve airtightness. Preferably, the lower part of the coil skeleton 40 is provided with an external thread, and the upper part of the valve body 10 is provided with an internal thread, and the coil skeleton 40 is threadedly connected to the valve body 10. This connection method is easy to assemble and can provide sufficient connection strength. At the same time, after the coil skeleton 40 is threadedly connected to the valve body 10, the edge of the diaphragm 20 is clamped between the lower edge of the coil skeleton 40 and the valve body 10, thereby improving the stability of the diaphragm 20.

[0057] In some embodiments, the diaphragm 20 includes: a water outlet area 94, wherein the first through hole 201 is arranged on the water outlet area 94; a water inlet area 95, wherein the water inlet area 95 is arranged around the water outlet area 94, and the second through hole 202 is arranged on the water inlet area 95, and the aperture of the second through hole 202 is smaller than the aperture of the first through hole 201; an elastic area 96, wherein the elastic area 96 is arranged around the water inlet area 95, and the thickness of the elastic area 96 is smaller than the thickness of the water inlet area 95; a fixed area 97, wherein the fixed area 97 is arranged around the elastic area 96; wherein the water outlet area 94, the water inlet area 95, the elastic member and the fixed area 97 are integrally formed.

[0058] The water outlet area 94 , the water inlet area 95 , the elastic area 96 and the elastic area 96 are an integrally formed structure, and the diaphragm 20 is made of a soft material.

[0059] The water outlet area 94 is circular and is provided with a first through hole 201 . The first through hole 201 penetrates the diaphragm 20 , and liquid can pass through the diaphragm 20 through the first through hole 201 .

[0060] The water inlet area 95 is arranged around the water outlet area 94. Specifically, the water inlet area 95 is annular, and the inner edge of the water inlet area 95 is connected to the outer edge of the water outlet area 94. The water inlet area 95 is provided with a second through hole 202, and the second through hole 202 penetrates the membrane 20. The second through hole 202 is used for the common liquid to pass through the membrane 20. The aperture of the second through hole 202 is smaller than the aperture of the first through hole 201, that is, the liquid flow rate of the first through hole 201 is smaller than the liquid flow rate of the second through hole 202.

[0061] The elastic region 96 is arranged around the water inlet region 95. Specifically, the elastic region 96 is also annular, and the outer edge of the water inlet region 95 is connected to the inner edge of the elastic region 96. The elastic region 96 has a certain elastic force. Of course, in some embodiments, the elastic region 96 only plays a connecting role and does not provide elastic force.

[0062] The thickness of the elastic region 96 is smaller than the thickness of the water inlet region 95 and the water outlet region 94; when the water inlet region 95 is subjected to an external force, the elastic region 96 may be deformed, thereby changing the positions of the water inlet region 95 and the water outlet region 94. Specifically, when the water inlet region 95 is subjected to an upward force, the elastic region 96 is deformed, and the water inlet region 95 and the water outlet region 94 move upward synchronously; when the water inlet region 95 is not subjected to a force or the forces applied to it cancel each other out, the water inlet region 95 and the water outlet region 94 are reset.

[0063] The fixing area 97 is annular and arranged around the elastic area 96, and the inner edge of the fixing area 97 is connected to the outer edge of the elastic area 96. The fixing area 97 is used to provide a position for fixing the diaphragm 20, that is, when in use, the fixing area 97 is held so that the diaphragm 20 is fixed.

[0064] The outer edges of the water inlet area 95, the water outlet area 94, the elastic area 96 and the fixed area 97 are concentric circles. It should be further explained that when the diaphragm 20 is fixed, the fixed area 97 is placed between two parts clamping the fixed area 97, and the two parts are connected by threads. When the two parts rotate to fix the fixed area 97, the upper and lower surfaces of the diaphragm 20 will be twisted, thereby causing the elastic area 96 to deform. Due to the buffering of the elastic area 96 and the thick thickness of the water inlet area 95, the water inlet area 95 will not be deformed, thereby ensuring that the second through hole 202 will not be deformed, and the aperture of the second through hole 202 is always smaller than the aperture of the first through hole 201.

[0065] By arranging the second through hole 202 on the water inlet area 95, the second through hole 202 is prevented from deforming when the diaphragm 20 rotates in different directions when the upper and lower surfaces of the diaphragm 20 are clamped and fixed. At the same time, by arranging the elastic area 96, it is convenient for the water outlet area 94 and the water inlet area 95 to move up and down along the axial direction of the diaphragm 20.

[0066] In some embodiments, the first through hole 201 is disposed at the center of the water outlet area 94. The first through hole 201 of the water outlet area 94 is located at the axis of the water outlet area 94. The arrangement of the first through hole 201 at the axis of the water outlet area 94 facilitates the control of the state of the diaphragm 20, that is, to avoid the outer edge away from the first through hole 201 from warping when the first through hole 201 of the water outlet area 94 is pressed.

[0067] In some embodiments, the diameter of the water inlet end of the second through hole 202 is larger than the diameter of the water outlet end of the second through hole 202. When the water outlet end of the diaphragm 20 is released from pressure contact, since the flow rate of the second through hole 202 is small and the flow rate of the first through hole 201 is large, when the pressure above the diaphragm 20 decreases, the water inlet area 95 will be lifted up so that water can directly pass over the diaphragm 20.

[0068] The lower iron sheet 30 is arranged at the bottom or inside of the diaphragm 20. The lower iron sheet 30 can be buried inside the diaphragm 20 and has a funnel-like shape. It can also be fixed to the bottom of the diaphragm 20. The lower iron sheet 30 is used to generate a magnetic attraction force with the stem 50, so that the stem 50 and the diaphragm 20 fit tightly and block the first through hole 201, so that the water pressure in the communication cavity 103 rises suddenly to close the diaphragm 20 downward to close the valve.

[0069] The coil frame 40 can be made of plastic material. The coil frame 40 is connected with the valve body 10 to form the connecting cavity 103, that is, the lower part of the coil frame 40 and the upper part of the valve body 10 enclose the connecting cavity 103 to form a closed space. The connecting cavity 103 is used to connect the water inlet channel 101 and the water outlet channel 102 respectively. A movable valve core, a diaphragm 20, etc. are arranged therein, and the on-off control of the fluid is realized by opening and closing the connecting cavity 103. A pressure balance hole can be arranged in the connecting cavity 103 to reduce the resistance of the valve core movement and ensure a quick response. A core cavity is arranged inside the coil frame 40.

[0070] The core column 50 is made of a magnetic material and is slidably disposed in the core cavity. The core column 50 can slide from the core cavity into the connecting cavity 103. The internal space of the core cavity is adapted to the size of the core column 50, that is, the core column 50 can be slidably embedded in the core cavity. The sliding track of the core column 50 is limited by the core cavity, so that it can slide stably on a preset track. The bottom of the core column 50 can be provided with a pointed head 92, which is used to block the first through hole 201 of the diaphragm 20.

[0071] The coil 60 is arranged on the outside of the coil frame 40. The magnetic force generated by the coil 60 after being energized is used to drive the core column 50 to rise or fall. The principle is as follows: after the coil 60 is energized, the current passes through the winding to generate a circular magnetic field, and its strength is proportional to the current. The magnetic field acts on the core column 50, causing it to move upward (or downward) driven by the magnetic attraction, thereby changing the position of the core column 50.

[0072] The upper iron sheet 70 is arranged on the top of the coil skeleton 40. The upper iron sheet 70 is not in direct contact with the core column 50, and the two are physically isolated by the coil skeleton 40. The upper iron sheet 70 is used to produce a magnetic attraction with the core column 50, so that the core column 50 can be stably adsorbed in the core cavity to keep the first through hole 201 open, that is, when the core column 50 rises, it can be attracted by the upper iron sheet 70, the first through hole 201 of the diaphragm 20 is opened, the water pressure in the connecting cavity 103 drops suddenly, and the water pressure of the water inlet channel 101 lifts the diaphragm 20 to open the valve.

[0073] The controller 80 is electrically connected to the coil 60, and the coil 60 is energized by the controller 80 to drive the stem 50 to rise or fall. The controller 80 can refer to the device used in the existing solenoid valve to control the energization of the coil 60, including but not limited to the driving device, the integrated driving module and the auxiliary components. It only needs to be able to realize the bidirectional energization of the coil 60.

[0074] The working principle of the solenoid valve is as follows: when the solenoid valve is in the valve closing state, since the lower iron sheet 30 is buried in the diaphragm 20, the diaphragm 20 is fixed in the valve body 10, and the stem 50 is tightly adsorbed by the lower iron sheet 30, and at the same time blocks the first through hole 201 on the diaphragm 20. At this time, the water pressure in the connecting cavity 103 in the valve body 10 increases, and the diaphragm 20 is located at the bottom of the connecting cavity 103 and is pushed down by the water pressure. At this time, the water inlet channel 101 is isolated from the water outlet channel 102, and water cannot flow through. When the solenoid valve needs to be converted from the valve closing state to the valve opening state, the coil 60 is energized through the controller 80, so that the coil 60 generates a current that can push the stem 50 upward. The driven magnetic field, the magnetic field force exerted on the core column 50 only needs to be sufficient to separate it from the lower iron sheet 30 and rise to a height sufficient to produce an adsorption effect with the upper iron sheet 70, and the controller 80 can stop energizing the coil 60. At this time, since the upper iron sheet 70 is fixed on the top of the coil skeleton 40, the core column 50 is fixed in the core cavity under the action of the magnetic force. At this time, the first through hole 201 is opened, and the connecting cavity 103 is connected to the water outlet channel 102 through the first through hole 201. The water pressure in the connecting cavity 103 drops suddenly, and the water pressure in the water inlet channel 101 lifts the diaphragm 20, and the water flows from the water inlet channel 101 to the water outlet channel 102, and the solenoid valve switches to the open valve state.

[0075] The present invention forms a connecting cavity 103, a water inlet channel 101 and a water outlet channel 102 by combining a coil skeleton 40 with a valve body 10, arranges a lower iron sheet 30 in the diaphragm 20, arranges an upper iron sheet 70 on the coil skeleton 40, adopts a core column 50 made of a magnetic material, and controls the rise and fall of the core column 50 by energizing the coil 60 through a controller 80. It only needs to energize the coil 60 when switching between the valve opening and valve closing states, drive the core column 50 to descend to be adsorbed with the lower iron sheet 30, or drive the core column 50 to rise and be adsorbed with the upper iron sheet 70 to stop energizing. The valve can be opened with a low voltage, thereby optimizing the valve opening performance, reducing power consumption, and improving endurance.

[0076] Since the magnet is immersed in water for a long time, it will mainly cause the magnet to rust, and may also cause weak magnetization of water. In order to prevent the magnet from losing its magnetic effect, which will cause the solenoid valve to fail to work properly, in some embodiments, a detachably connected stem cover 90 and a stem shell 91 are also included. The stem 50 is arranged in the space formed after the stem cover 90 and the stem 50 shell 91 are connected, and the core cavity is adapted to the stem shell 91. The stem cover 90 and the stem shell 91 are tightly connected, and the bottom of the stem shell 91 can also be provided with a pointed head 92 for blocking the first through hole 201. The stem cover 90 and the stem shell 91 can both be made of a material that does not affect the magnetic force, such as a plastic material. The stem cover 90 and the stem shell 91 are combined to form a closed space to protect the stem 50, thereby extending the service life of the stem 50.

[0077] The upper iron sheet 70 is easily corroded by moisture and impurities in the air due to long-term exposure to the air, which causes the upper iron sheet 70 to rust and lose the magnetic adsorption function with the core column 50, thereby causing the core column 50 to be unable to be adsorbed in the core cavity, affecting the valve opening performance of the solenoid valve. Therefore, in some embodiments, a skeleton cover 93 is also included, and the skeleton cover 93 is covered on the top of the coil skeleton 40 to fix the upper iron sheet 70. The skeleton cover 93 is tightly connected to the coil skeleton 40. When the skeleton cover 93 is covered on the top of the coil skeleton 40, the upper iron sheet 70 is firmly fixed on the coil skeleton 40, thereby improving stability and increasing the service life of the upper iron sheet 70.

[0078] The coil skeleton 40 and the valve body 10 are detachably fixedly connected, and the two can be connected by a snap-fit ​​structure, a buckle structure, etc., and a waterproof gasket can be provided at the connection to achieve airtightness. Preferably, the lower part of the coil skeleton 40 is provided with an external thread, and the upper part of the valve body 10 is provided with an internal thread, and the coil skeleton 40 is threadedly connected to the valve body 10. This connection method is easy to assemble and can provide sufficient connection strength. At the same time, after the coil skeleton 40 is threadedly connected to the valve body 10, the edge of the diaphragm 20 is clamped between the lower edge of the coil skeleton 40 and the valve body 10, thereby improving the stability of the diaphragm 20.

[0079] In some embodiments, the diaphragm 20 includes: a water outlet area 94, wherein the first through hole 201 is arranged on the water outlet area 94; a water inlet area 95, wherein the water inlet area 95 is arranged around the water outlet area 94, and the second through hole 202 is arranged on the water inlet area 95, and the aperture of the second through hole 202 is smaller than the aperture of the first through hole 201; an elastic area 96, wherein the elastic area 96 is arranged around the water inlet area 95, and the thickness of the elastic area 96 is smaller than the thickness of the water inlet area 95; a fixed area 97, wherein the fixed area 97 is arranged around the elastic area 96; wherein the water outlet area 94, the water inlet area 95, the elastic member and the fixed area 97 are integrally formed.

[0080] The water outlet area 94 , the water inlet area 95 , the elastic area 96 and the elastic area 96 are an integrally formed structure, and the diaphragm 20 is made of a soft material.

[0081] The water outlet area 94 is circular and is provided with a first through hole 201 . The first through hole 201 penetrates the diaphragm 20 , and liquid can pass through the diaphragm 20 through the first through hole 201 .

[0082] The water inlet area 95 is arranged around the water outlet area 94. Specifically, the water inlet area 95 is annular, and the inner edge of the water inlet area 95 is connected to the outer edge of the water outlet area 94. The water inlet area 95 is provided with a second through hole 202, and the second through hole 202 penetrates the membrane 20. The second through hole 202 is used for the common liquid to pass through the membrane 20. The aperture of the second through hole 202 is smaller than the aperture of the first through hole 201, that is, the liquid flow rate of the first through hole 201 is smaller than the liquid flow rate of the second through hole 202.

[0083] The elastic region 96 is arranged around the water inlet region 95. Specifically, the elastic region 96 is also annular, and the outer edge of the water inlet region 95 is connected to the inner edge of the elastic region 96. The elastic region 96 has a certain elastic force. Of course, in some embodiments, the elastic region 96 only plays a connecting role and does not provide elastic force.

[0084] The thickness of the elastic region 96 is smaller than the thickness of the water inlet region 95 and the water outlet region 94; when the water inlet region 95 is subjected to an external force, the elastic region 96 may be deformed, thereby changing the positions of the water inlet region 95 and the water outlet region 94. Specifically, when the water inlet region 95 is subjected to an upward force, the elastic region 96 is deformed, and the water inlet region 95 and the water outlet region 94 move upward synchronously; when the water inlet region 95 is not subjected to a force or the forces applied to it cancel each other out, the water inlet region 95 and the water outlet region 94 are reset.

[0085] The fixing area 97 is annular and arranged around the elastic area 96, and the inner edge of the fixing area 97 is connected to the outer edge of the elastic area 96. The fixing area 97 is used to provide a position for fixing the diaphragm 20, that is, when in use, the fixing area 97 is held so that the diaphragm 20 is fixed.

[0086] The outer edges of the water inlet area 95, the water outlet area 94, the elastic area 96 and the fixed area 97 are concentric circles. It should be further explained that when the diaphragm 20 is fixed, the fixed area 97 is placed between two parts clamping the fixed area 97, and the two parts are connected by threads. When the two parts rotate to fix the fixed area 97, the upper and lower surfaces of the diaphragm 20 will be twisted, thereby causing the elastic area 96 to deform. Due to the buffering of the elastic area 96 and the thick thickness of the water inlet area 95, the water inlet area 95 will not be deformed, thereby ensuring that the second through hole 202 will not be deformed, and the aperture of the second through hole 202 is always smaller than the aperture of the first through hole 201.

[0087] By arranging the second through hole 202 on the water inlet area 95, the second through hole 202 is prevented from deforming when the diaphragm rotates in different directions when the upper and lower surfaces of the diaphragm are clamped and fixed. At the same time, by arranging the elastic area 96, it is convenient for the water outlet area 94 and the water inlet area 95 to move up and down along the axial direction of the diaphragm.

[0088] In some embodiments, the first through hole 201 is disposed at the center of the water outlet area 94. The first through hole 201 of the water outlet area 94 is located at the axis of the water outlet area 94. The arrangement of the first through hole 201 at the axis of the water outlet area 94 facilitates the control of the state of the diaphragm, that is, to avoid the outer edge away from the first through hole 201 from warping when the first through hole 201 of the water outlet area 94 is pressed.

[0089] In some embodiments, the diameter of the water inlet end of the second through hole 202 is larger than the diameter of the water outlet end of the second through hole 202. When the membrane is released from pressure contact, since the flow rate of the second through hole 202 is small and the flow rate of the first through hole 201 is large, when the pressure above the membrane decreases, the water inlet area 95 will be lifted up so that water can directly pass over the membrane 20.

[0090] The present invention further provides an irrigation system, comprising: a water inlet pipe and a solar water pump connected to each other, wherein the solar water pump is provided with a solenoid valve as described in the above embodiment.

[0091] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A solenoid valve, characterized in that: include: A valve body, wherein the valve body is provided with a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are connected through a connecting cavity; A diaphragm, the diaphragm cover is arranged at the water outlet end of the water inlet channel and the water inlet end of the water outlet channel, and the diaphragm is provided with a first through hole and a second through hole; A lower iron sheet, the lower iron sheet being arranged at the bottom or inside of the diaphragm; A coil frame, wherein the coil frame is detachably fixedly connected to the valve body to form the communicating cavity, and a core cavity is provided inside the coil frame; A core column, which is made of a magnetic material and is slidably disposed in the core cavity; A coil, wherein the coil ring is arranged outside the coil frame; An upper iron sheet, the upper iron sheet being arranged on the upper surface of the coil frame; A controller is electrically connected to the coil, and the coil is energized by the controller to drive the core column to rise or fall.

2. The solenoid valve according to claim 1, characterized in that: It also includes a detachably connected stem cover and a stem shell. The stem is arranged in a space formed after the stem cover and the stem shell are connected, and the core cavity is adapted to the stem shell.

3. The solenoid valve according to claim 1, characterized in that: It also includes a frame cover, which is arranged on the coil frame and is used to fix the upper iron sheet.

4. The solenoid valve according to claim 1, characterized in that: The diaphragm is circular; and / or the diaphragm is a rubber diaphragm.

5. The solenoid valve according to claim 1, characterized in that: The lower part of the coil frame is provided with an external thread, the upper part of the valve body is provided with an internal thread, and the coil frame is threadedly connected with the valve body.

6. The solenoid valve according to claim 5, characterized in that: After the coil frame is threadedly connected to the valve body, the edge of the diaphragm is clamped between the lower edge of the coil frame and the valve body.

7. The solenoid valve according to claim 6, characterized in that: The diaphragm comprises: A water outlet area, wherein the first through hole is arranged on the water outlet area; a water inlet area, the water inlet area is arranged around the water outlet area, and the second through hole is arranged on the water inlet area, and the aperture of the second through hole is smaller than the aperture of the first through hole; an elastic region, the elastic region being arranged around the water inlet region, the thickness of the elastic region being smaller than the thickness of the water inlet region; a fixed area, the fixed area being arranged around the elastic area; Wherein, the water outlet area, the water inlet area, the elastic member and the fixing area are integrally formed.

8. The solenoid valve according to claim 7, characterized in that: The membrane includes: the first through hole is located at the center of the water outlet area.

9. The solenoid valve according to claim 8, characterized in that: The aperture of the second through hole is larger than the aperture of the second through hole.

10. An irrigation system, characterized in that The invention comprises: a water inlet pipe and a solar water pump connected to each other, wherein the solar water pump is provided with a solenoid valve as claimed in any one of claims 1 to 9.

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