Pilot-operated type electromagnetic pulse valve and irrigation system
By designing a pilot-operated electromagnetic pulse valve in the irrigation system, and using the pressure difference between the pressure relief channel and the pressure relief valve port to control the opening and closing of the valve, the problems of high temperature rise and high energy consumption of the electromagnetic valve coil are solved, and efficient and stable flow control is achieved.
Patent Information
- Application Number
- CN202520249950.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-17
AI Technical Summary
In existing irrigation systems, the coils of solenoid valves experience temperature rise due to prolonged energization, resulting in poor stability and reliability, as well as high energy consumption.
Design a pilot-operated electromagnetic pulse valve. By setting a pressure relief channel and a pressure relief valve port, the opening and closing of the pressure relief valve port is controlled by an electromagnet assembly to form a pressure difference to regulate the opening and closing of the valve port by the diaphragm assembly, thereby achieving large flow control. In the open state, the power is cut off to avoid coil temperature rise.
This technology enables high flow control through a small coil, reducing energy consumption, improving the stability and reliability of the solenoid valve, and avoiding performance degradation caused by prolonged coil energization.
Smart Images
Figure CN223677138U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of irrigation valves, in particular to a pilot type electromagnetic pulse valve and an irrigation system. BACKGROUND
[0002] With the progress of science and technology, the application of high-pressure water operation in water supply systems is becoming increasingly common, especially in the field of irrigation. Different crops require different amounts of water, so in order to ensure crop yield and quality, reliable and accurate valve control of irrigation water volume should be adopted. As an important device for fluid control, the electromagnetic pulse valve precisely controls the flow of medium by adjusting the opening and closing of the valve, thereby achieving effective management of the liquid and becoming an indispensable part of industrial production.
[0003] The irrigation system often uses electromagnetic valves to control the opening and closing of the irrigation pipeline. The control method is as follows: the electromagnetic valve uses the coil to provide a magnetic field. When the valve needs to be opened, the coil is energized, the magnetic force of the fixed core on the movable core increases, the movable core moves towards the fixed core and the spring is compressed, and the valve port is opened. When the valve needs to be closed, the coil is de-energized, the spring force is greater than the magnetic force of the fixed core, and the movable core is driven by the spring to close the valve port. Since the irrigation time is relatively long, which means that the coil is energized for a long time, the coil may experience temperature rise. The coil may fail during long-term use, which makes it difficult to ensure the stability and reliability of the electromagnetic valve. In addition, the coil needs to be continuously energized when the valve is in operation, which consumes a lot of energy. CONTENT OF THE INVENTION
[0004] Therefore, it is necessary to provide a pilot type electromagnetic pulse valve that can operate stably and reduce energy consumption.
[0005] To solve the above technical problems, the present application provides the following technical solutions:
[0006] A pilot type electromagnetic pulse valve is applied to an irrigation system, and the pilot type electromagnetic pulse valve comprises:
[0007] A valve body has an inlet, an outlet and a valve port, and the inlet and the outlet are communicated through the valve port;
[0008] A pilot seat is installed on the valve body, and a pressure relief channel and a pressure relief valve port are formed on the pilot seat, the pressure relief channel is communicated with the inlet and the outlet respectively, and the pressure relief valve port is arranged on the pressure relief channel;
[0009] An electromagnet assembly is installed on the pilot seat, which is used to control the opening and closing of the pressure relief valve port and the opening and closing of the pressure relief channel;
[0010] A diaphragm assembly is installed in the valve body and is pressed and positioned with the pilot seat, which is used to control the opening and closing of the valve port.
[0011] The pilot electromagnetic pulse valve has an open state and a closed state, the electromagnet assembly is de-energized when the pilot electromagnetic pulse valve is in the open state, and the electromagnet assembly is energized when the pilot electromagnetic pulse valve is switched between the open state and the closed state.
[0012] It can be understood that, by setting the pressure relief channel and the pressure relief valve port to form a pilot structure, the electromagnet assembly is used to control the opening and closing of the pressure relief valve port, thereby forming a pressure difference on both sides of the pressure plate and the diaphragm. By using this pressure difference, the opening and closing of the valve port by the diaphragm assembly can be adjusted, thereby achieving control of the large valve port. This design enables the pilot electromagnetic pulse valve to achieve large flow control through a small coil and reduces manufacturing costs. In addition, the movable core can be de-energized when it is in the open state, which means that it does not have to be continuously energized during irrigation, thereby reducing costs. The pilot electromagnetic pulse valve can be de-energized during irrigation, which can also avoid the problem of performance degradation of the pilot electromagnetic pulse valve after long-term use due to temperature rise of the coil.
[0013] In one embodiment, the electromagnet assembly includes a fixed core, a movable core, and a first elastic member, the first elastic member is arranged between the fixed core and the movable core, and abuts against the fixed core and the movable core, respectively;
[0014] When the pilot electromagnetic pulse valve is in the open state, the movable core abuts against the fixed core, and the first elastic member is limited by the movable core and the fixed core.
[0015] In one embodiment, the maximum movement stroke of the movable core relative to the fixed core is set to X, where 1.4mm≥X≥0.8mm.
[0016] It can be understood that the maximum movement stroke of the movable core relative to the fixed core is set within a certain range, and the movement amplitude of the first elastic member driving the movable core is reasonably limited. On the one hand, the force of the first elastic member acting on the movable core remains unchanged, thereby enabling the movable core to maintain force balance in the open and closed states to achieve the purpose of de-energization in the open state. On the other hand, the smaller movement stroke enables the movable core to quickly switch between the two terminal positions, thereby shortening the response time of the pilot electromagnetic pulse valve.
[0017] In one embodiment, the electromagnet assembly further includes a winding coil, the winding coil is sleeved on the fixed core and the movable core;
[0018] The current direction of the winding coil can be changed to switch the pilot electromagnetic pulse valve between the open state and the closed state.
[0019] In one of the embodiments, the diaphragm assembly comprises a diaphragm, a pressing plate and a second elastic member, the pressing plate is installed on the diaphragm and abuts against the second elastic member, and the end of the second elastic member away from the pressing plate abuts against the pilot seat;
[0020] The part of the diaphragm located at the periphery of the pressing plate is limited by the valve body and the pilot seat, and the diaphragm can control the opening / closing of the valve port.
[0021] It can be understood that the diaphragm is fixed by limiting the diaphragm through the pilot seat and the valve body, which can prevent the diaphragm from deforming excessively due to uneven stress.
[0022] In one of the embodiments, the pressing plate has a guide portion, the guide portion penetrates through the diaphragm and extends into the valve port;
[0023] The guide portion can be in sliding fit with the valve body.
[0024] It can be understood that the guide portion is provided on the pressing plate, and the guide portion and the valve body are in sliding fit, which realizes the guidance of the movement of the pressing plate and ensures the accuracy and stability of the action of the diaphragm.
[0025] In one of the embodiments, the guide portion comprises an abutting plate portion and a plurality of guide rib plates, the plurality of guide rib plates are arranged on one end surface of the abutting plate portion and are arranged in sequence and spaced apart along the circumferential direction of the abutting plate portion;
[0026] The abutting plate portion abuts against and limits the diaphragm, and the plurality of guide rib plates are in sliding fit with the valve body.
[0027] It can be understood that the guide portion is designed to comprise the abutting plate portion and the plurality of circumferentially spaced apart guide rib plates, which realizes the function of guidance on one hand and does not affect the water flow when the valve port is opened / closed on the other hand.
[0028] In one of the embodiments, the pressing plate further has a plurality of connecting protrusions, the plurality of connecting protrusions are arranged at the periphery of the guide portion, and the plurality of connecting protrusions can penetrate through the diaphragm and abut against and limit the diaphragm respectively.
[0029] It can be understood that the positioning and firm connection of the pressing plate and the diaphragm are realized through the plurality of connecting protrusions, the diaphragm is positioned through the connecting protrusions, which can prevent the diaphragm from deviating relative to the pressing plate during the operation, thereby ensuring the normal operation of the pilot electromagnetic pulse valve.
[0030] In one of the embodiments, the pressing plate further has a limiting protrusion, which is arranged on an end surface of the pressing plate facing the pilot seat;
[0031] The second elastic member is sleeved on the limiting protrusion and abuts against the limiting protrusion.
[0032] The application further provides the following technical solutions:
[0033] An irrigation system comprising the pilot type electromagnetic pulse valve according to any one of the above embodiments.
[0034] Compared with the prior art, the pilot type electromagnetic pulse valve forms a pilot type structure by arranging the pressure relief channel and the pressure relief valve port, and controls the opening and closing of the pressure relief port by using the movable iron core and the iron core sealing assembly in the electromagnetic head, so as to form a pressure difference on both sides of the pressing plate and the diaphragm. By using the pressure difference, the opening and closing of the valve port by the pressing plate and the diaphragm assembly can be adjusted, and the control of the large valve port is realized. This design enables the pilot type electromagnetic pulse valve to realize the flow control of large flow by a small coil, and can reduce the cost. In addition, the movable iron core can be powered off when it is in the open state, which means that it is not necessary to continuously power on during the irrigation process, and therefore the cost can be further reduced. The pilot type electromagnetic pulse valve can be powered off during irrigation, which can also avoid the problem of performance degradation of the pilot type electromagnetic pulse valve after long-term use due to the temperature rise of the coil. BRIEF DESCRIPTION OF DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0036] Figure 1 The pilot type electromagnetic pulse valve structure sectional view provided by the application.
[0037] Figure 2 The pilot type electromagnetic pulse valve structure sectional view provided by the application. Figure 1 The enlarged view of A in the application.
[0038] Figure 3 The pilot type electromagnetic pulse valve provided by the application.
[0039] The element reference numbers are as follows:
[0040] 100, pilot operated solenoid operated valve; 10, valve body; 11, inlet; 12, outlet; 13, valve port; 20, pilot seat; 21, pressure relief passage; 211, first liquid inlet passage; 212, liquid discharge passage; 22, pressure relief valve port; 23, first chamber; 30, electromagnet assembly; 31, fixed core; 32, movable core; 33, first elastic member; 34, winding coil; 40, diaphragm assembly; 41, diaphragm; 42, pressing plate; 421, guide portion; 4211, abutting plate portion; 4212, guide rib plate; 422, connecting protrusion; 4213, second liquid inlet passage; 423, second chamber; 424, limiting protrusion; 43, second elastic member. DETAILED DESCRIPTION
[0041] To make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways from those described herein without departing from the scope of the present application and it is understood that variations can be made in view of what is described and understood in the field of art. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0042] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements can also be present. In addition, when an element is referred to as being "connected" to another element, it can be directly connected to the other element, or intervening elements can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions as used in the description of the specification are used for explanation only and do not indicate the only orientation of the present application.
[0043] In addition, the terms "first", "second", etc. are used herein only to describe various elements, but do not imply or suggest relative importance or a number of the indicated technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0044] In the present application, unless specifically defined and limited otherwise, the first feature is "on", "under", "above" or "over" the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature is "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.
[0045] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.
[0046] Please refer to Figures 1 to 3 The present application provides a pilot electromagnetic pulse valve 100 applied to an irrigation system, comprising a valve body 10, a pilot seat 20, an electromagnet assembly 30 and a diaphragm assembly 40, the valve body 10 has an inlet 11, an outlet 12 and a valve port 13, the inlet 11 and the outlet 12 are communicated through the valve port 13; the pilot seat 20 is installed on the valve body 10, the pilot seat 20 is provided with a pressure relief channel 21 and a pressure relief valve port 22, the pressure relief channel 21 is communicated with the inlet 11 and the outlet 12 respectively, and the pressure relief valve port 22 is arranged on the pressure relief channel 21; the electromagnet assembly 30 is installed on the pilot seat 20, used for controlling the opening / closing of the pressure relief valve port 22 and the opening / closing of the pressure relief channel 21; the diaphragm assembly 40 is installed in the valve body 10 and is pressed and limited by the pilot seat 20, used for controlling the opening / closing of the valve port 13; wherein the pilot electromagnetic pulse valve 100 has an open state and a closed state, when the pilot electromagnetic pulse valve 100 is in the open state, the electromagnet assembly 30 is powered off; when the pilot electromagnetic pulse valve 100 switches between the open state and the closed state, the electromagnet assembly 30 is powered on.
[0047] As can be seen from the above, the pilot type structure is formed by setting the pressure relief channel 21 and the pressure relief valve port 22, and the opening and closing of the pressure relief valve port 22 is controlled by the electromagnet assembly 30, so as to form a pressure difference on both sides of the pressure plate 42 and the diaphragm 41. By using this pressure difference, the opening and closing of the valve port 13 by the pressure plate 42 and the diaphragm assembly 40 can be adjusted to achieve control of the large valve port. This design enables the pilot type electromagnetic pulse valve 100 to achieve large flow control by a small coil, thereby reducing the cost. In addition, the movable core 32 can be powered off when it is in the open state, which means that the pilot type electromagnetic pulse valve 100 does not have to be continuously powered on during irrigation, thereby further reducing the cost. The pilot type electromagnetic pulse valve 100 can be powered off during irrigation, which can also avoid the problem of performance degradation of the pilot type electromagnetic pulse valve 100 after long-term use due to temperature rise of the coil.
[0048] In the present embodiment, a first chamber 23 is formed between the pilot seat 20 and the electromagnet assembly 30, and the pressure relief channel 21 includes a first liquid inlet channel 211 and a liquid outlet channel 212. After the water flows into the first chamber 23 through the liquid inlet channel, it is discharged from the liquid outlet channel 212 to the outlet 12 through the valve port 13.
[0049] As shown in Figure 1 , the electromagnet assembly 30 includes a fixed core 31, a movable core 32, and a first elastic member 33. The first elastic member 33 is arranged between the fixed core 31 and the movable core 32 and abuts against the fixed core 31 and the movable core 32, respectively. When the pilot type electromagnetic pulse valve 100 is in the open state, the movable core 32 abuts against the fixed core 31, and the first elastic member 33 is pressed and limited by the movable core 32 and the fixed core 31.
[0050] Preferably, the first elastic member 33 is configured as a spring.
[0051] Further, the maximum movement stroke of the movable core 32 relative to the fixed core 31 is set as X, where 1.4mm≥X≥0.8mm. In this way, by reasonably limiting the movement amplitude of the first elastic member 33 driving the movable core 32, on the one hand, the force of the first elastic member 33 acting on the movable core 32 remains almost unchanged, thereby enabling the movable core 32 to maintain force balance in the open and closed states to achieve the purpose of power-off in the open state, and on the other hand, the smaller movement stroke enables the movable core 32 to quickly switch between the two terminal positions, thereby shortening the response time of the pilot type electromagnetic pulse valve 100.
[0052] As shown in Figure 1 , the electromagnet assembly 30 further includes a winding coil 34, which is sleeved on the fixed core 31 and the movable core 32. The current direction of the winding coil 34 when energized can be changed to enable the pilot type electromagnetic pulse valve 100 to switch back and forth between the open state and the closed state.
[0053] In the embodiment, the winding coil 34 is configured as a plastic package coil.
[0054] In an embodiment, the diaphragm assembly 40 comprises a diaphragm 41, a pressing plate 42 and a second elastic member 43, the pressing plate 42 is mounted on the diaphragm 41 and abuts against the second elastic member 43, and an end of the second elastic member 43 away from the pressing plate 42 abuts against the pilot seat 20; wherein the part of the diaphragm 41 located at the periphery of the pressing plate 42 is limited by the valve body 10 and the pilot seat 20, and the diaphragm 41 can control the opening / closing of the valve port 13. By limiting the diaphragm 41 through the pilot seat 20 and the valve body 10, the diaphragm 41 is fixed, which can prevent the diaphragm 41 and the pressing plate 42 from excessive deformation.
[0055] As preferred, the second elastic member is configured as a spring.
[0056] As shown in Figure 2 and Figure 3 , the pressing plate 42 has a guide portion 421, which penetrates through the diaphragm 41 and extends into the valve port 13; wherein the guide portion 421 can be in sliding fit with the valve body 10. It can be understood that, by providing the guide portion 421 on the pressing plate 42, the sliding fit of the guide portion 421 with the valve body 10 realizes the guidance of the movement of the pressing plate 42, thereby ensuring the accuracy and stability of the action of the diaphragm 41.
[0057] In an embodiment, the guide portion 421 comprises an abutting plate portion 4211 and a plurality of guide rib plates 4212, the plurality of guide rib plates 4212 are arranged on one end face of the abutting plate portion 4211 and are arranged in sequence and spaced along the circumferential direction of the abutting plate portion 4211; wherein the abutting plate portion 4211 abuts against and limits the diaphragm 41, and the plurality of guide rib plates 4212 are in sliding fit with the valve body 10. In this way, by designing the guide portion 421 to be composed of the abutting plate portion 4211 and the plurality of circumferentially spaced guide rib plates 4212, on the one hand, the function of guidance is realized, and on the other hand, the water flow is not affected when the valve port 13 is opened / closed by the guide rib plates 4212. Here, the number of the guide rib plates 4212 can be configured as three, four, five, etc.
[0058] In the embodiment, the number of the guide rib plates 4212 is configured as four, and through the four guide rib plates 4212, the weight of the guide portion 421 can be reduced while realizing good sliding fit with the valve body 10.
[0059] In an embodiment, the pressing plate 42 further has a plurality of connecting protrusions 422 arranged at the periphery of the guide portion 421, and each of the plurality of connecting protrusions 422 is capable of penetrating through the diaphragm 41 and abutting against the diaphragm 41. In this way, the positioning and firm connection of the pressing plate 42 and the diaphragm 41 are achieved by providing the plurality of connecting protrusions 422, and the diaphragm 41 is positioned by the connecting protrusions, so that the diaphragm 41 is prevented from being deviated relative to the pressing plate 42 during operation, thereby ensuring the normal operation of the pilot electromagnetic pulse valve 100.
[0060] Here, the number of the connecting protrusions 422 can be configured as two, three, four, five, etc.
[0061] In the present embodiment, the number of the connecting protrusions 422 is configured as two, and the pressure relief passage 21 further comprises a second liquid inlet passage 4213 and a second chamber 423 formed by the guide seat and the diaphragm assembly 40. The second liquid inlet passage (not shown in the figure) is provided on one of the connecting protrusions 422, and water flows from the inlet 11 into the second chamber 423 through the second liquid inlet passage 4213.
[0062] In an embodiment, the pressing plate 42 further has a limiting protrusion 424 provided on an end surface of the pressing plate 42 facing the pilot seat 20, and the second elastic member 43 is sleeved on the limiting protrusion 424 and abuts against the limiting protrusion 424.
[0063] In the present embodiment, the working principle of the pilot electromagnetic pulse valve 100 is as follows:
[0064] When the pilot electromagnetic pulse valve 100 needs to be opened: the power is turned on, the magnetic force acting on the movable core 32 is greater than the elastic force of the first elastic member 33, the movable core 32 is attracted and moved upward by the fixed core 31, and water flows out through the pressure relief passage 21, so that the water pressure in the first chamber 23 and the second chamber 423 decreases, the water pressure at the outlet 12 at the diaphragm assembly 40 is greater than the elastic force of the second elastic member 43, the diaphragm assembly 40 moves upward, and the valve port 13 is opened.
[0065] After the pilot electromagnetic pulse valve 100 is opened and the power is turned off, the water pressure, the magnetic force and the elastic force of the first elastic member 33 are balanced with each other, and the valve can be in an open state under the condition of power-off.
[0066] When the pilot electromagnetic pulse valve 100 needs to be closed: the power is turned on in the reverse direction, the elastic force of the first elastic member 33 is greater than the magnetic force acting on the movable core 32, the movable core 32 is driven to move downward by the elastic force of the first elastic member 33, and the pressure relief valve port 22 is blocked, so that the water pressure in the first chamber 23 and the second chamber 423 increases, the water pressure at the outlet 12 at the diaphragm assembly 40 is less than the elastic force of the second elastic member 43, the diaphragm assembly 40 moves downward, and the valve port 13 is blocked.
[0067] The pilot electromagnetic pulse valve 100 is powered off after being closed.
[0068] The application also provides the following technical scheme: an irrigation system comprising the pilot electromagnetic pulse valve 100 according to any one of the above embodiments.
[0069] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.
[0070] The above embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.
Claims
1. A pilot-operated electromagnetic pulse valve, used in an irrigation system, characterized in that, The pilot electromagnetic pulse valve (100) comprises: a valve body (10) having an inlet (11), an outlet (12) and a valve port (13) in communication between the inlet (11) and the outlet (12) through the valve port (13); a pilot seat (20) mounted on the valve body (10), the pilot seat (20) being provided with a pressure relief channel (21) and a pressure relief valve port (22), the pressure relief channel (21) being in communication with the inlet (11) and the outlet (12) respectively, and the pressure relief valve port (22) being arranged on the pressure relief channel (21); an electromagnet assembly (30) mounted on the pilot seat (20) for controlling the opening / closing of the pressure relief valve port (22) and the opening / closing of the pressure relief channel (21); a diaphragm assembly (40) mounted in the valve body (10) and pressed against the pilot seat (20) for controlling the opening / closing of the valve port (13); wherein the pilot electromagnetic pulse valve (100) has an open state and a closed state, when the pilot electromagnetic pulse valve (100) is in the open state, the electromagnet assembly (30) is de-energized; when the pilot electromagnetic pulse valve (100) switches between the open state and the closed state, the electromagnet assembly (30) is energized.
2. The pilot operated electromagnetic pulse valve of claim 1, wherein, The electromagnet assembly (30) comprises a fixed core (31), a movable core (32) and a first elastic member (33), the first elastic member (33) being arranged between the fixed core (31) and the movable core (32) and abutting against the fixed core (31) and the movable core (32) respectively; When the pilot electromagnetic pulse valve (100) is in the open state, the movable core (32) abuts against the fixed core (31), and the first elastic member (33) is pressed and limited by the movable core (32) and the fixed core (31).
3. The pilot operated electromagnetic pulse valve of claim 2, wherein, The maximum movement stroke of the movable core (32) relative to the fixed core (31) is set as X, wherein 1.4mm≥X≥0.8mm.
4. The pilot operated electromagnetic pulse valve of claim 2, wherein, The electromagnet assembly (30) further comprises a winding coil (34) sleeved on the fixed core (31) and the movable core (32); wherein the current direction of the winding coil (34) can be changed when energized, so that the pilot electromagnetic pulse valve (100) switches back and forth between the open state and the closed state.
5. The pilot operated electromagnetic pulse valve of claim 1, wherein, The diaphragm assembly (40) comprises a diaphragm (41), a pressing plate (42) and a second elastic member (43), the pressing plate (42) being mounted on the diaphragm (41) and abutting against the second elastic member (43), one end of the second elastic member (43) away from the pressing plate (42) abutting against the pilot seat (20); wherein the part of the diaphragm (41) located at the periphery of the pressing plate (42) is pressed and limited by the valve body (10) and the pilot seat (20), and the diaphragm (41) can control the opening / closing of the valve port (13).
6. The pilot operated electromagnetic pulse valve of claim 5, wherein, The pressing plate (42) has a guide portion (421) penetrating through the diaphragm (41) and extending into the valve port (13); The guide portion (421) is capable of slidingly fitting with the valve body (10).
7. The pilot operated electromagnetic pulse valve of claim 6, wherein, The guide portion (421) comprises an abutting plate portion (4211) and a plurality of guide rib plates (4212), the plurality of guide rib plates (4212) are arranged on one end surface of the abutting plate portion (4211) and are sequentially and spacedly arranged along the circumferential direction of the abutting plate portion (4211); The abutting plate portion (4211) is capable of abutting and limiting with the diaphragm (41), and the plurality of guide rib plates (4212) are capable of collectively slidingly fitting with the valve body (10).
8. The pilot operated electromagnetic pulse valve of claim 6, wherein, The pressing plate (42) further has a plurality of connecting protrusions (422), the plurality of connecting protrusions (422) are arranged on the periphery of the guide portion (421), and the plurality of connecting protrusions (422) are capable of penetrating through the diaphragm (41) and abutting and limiting with the diaphragm (41) respectively.
9. The pilot operated electromagnetic pulse valve of claim 5, wherein, The pressing plate (42) further has a limiting protrusion (424) arranged on one end surface of the pressing plate (42) facing the pilot seat (20); The second elastic member (43) is sleeved on the limiting protrusion (424) and abuttingly limited with the limiting protrusion (424).
10. An irrigation system characterized by, The pilot type electromagnetic pulse valve (100) according to any one of claims 1-9.