Irrigation valve

Abstract

The utility model discloses an irrigation valve, which is characterized in that a flow adjusting part is arranged above a water inlet of the irrigation valve and comprises a diaphragm structure, and the tightness of a spring can be adjusted by connecting a tightness adjusting structure above the diaphragm structure through the spring, so that the pressure required when the diaphragm structure is opened is changed, and the flow control is further realized. The knob switch is arranged at the connecting position of the upper body and the lower body of the electromagnetic valve, the knob switch can periodically open the pilot hole and open the irrigation valve by manually rotating the iron core when the electromagnet cannot work to open the pilot hole, the emergency capacity is high, the reliability is good, and maintenance is convenient. And the filter mesh is arranged at the pilot hole of the membrane structure to filter large-particle impurities in water, so that abrasion of important components in the irrigation valve can be reduced, and disassembly is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pilot operated solenoid valve door assembly, concretely relates to an irrigation valve. BACKGROUND

[0002] Irrigation is the most basic and most widely used technology in the field of agriculture, and irrigation technology can determine the growth of crops. It is very common to control the water pipe for irrigation through the electromagnetic valve now, but the environment of the valve in agricultural production is relatively harsh, the water source for irrigation often mixes with many impurities, and is not often maintained, and is easily affected by corrosion and other factors to cause damage.

[0003] And the existing agricultural electromagnetic irrigation valve has electromagnetic switch function failure valve, that is, it cannot be used, and the flow when the valve is opened cannot be adjusted. In the "low-in high-out plastic electromagnetic valve" with the announcement number CN211525652U, the electromagnetic valve can only control the opening and closing of the valve through the electromagnet, but lacks a device for manually opening and closing the valve and adjusting the flow, has weak emergency capability, poor durability, and needs to be maintained frequently. The water entering the pilot hole has many impurities, which can easily accelerate the wear of the electromagnetic valve. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides an irrigation valve, the water inlet of the irrigation valve is provided with a flow adjusting part including a diaphragm structure, a spring connecting tension adjusting structure is arranged above the diaphragm structure, the tension of the spring can be adjusted, so that the pressure required when the diaphragm structure is opened is changed, and then the flow control is realized. A knob switch is arranged at the connecting position of the electromagnetic valve upper body and the electromagnetic valve lower body, when the electromagnet cannot work to open the pilot hole, the iron core can be regularly opened by manually rotating the knob switch, so that the pilot hole is opened, the irrigation valve is opened, the emergency capability is strong, the reliability is good, and the maintenance is convenient. A filter screen is arranged at the pilot hole position of the diaphragm structure, and the filter screen can filter the impurities with large particles in the water, so that the wear of the important components in the irrigation valve is reduced, and the disassembly is more convenient.

[0005] The utility model realizes the above technical purpose through the following technical means.

[0006] An irrigation valve comprises an electromagnetic valve upper body and an electromagnetic valve lower body, a flow adjusting part is arranged above the water inlet of the irrigation valve, and an electromagnetic valve upper body is arranged above the water outlet of the irrigation valve.

[0007] A knob switch mounting hole is arranged at the connecting position of the electromagnetic valve upper body and the electromagnetic valve lower body, and a knob switch is mounted in the knob switch mounting hole.

[0008] Further, the flow regulating component comprises a tightness adjusting structure and a diaphragm structure, a spring is connected between the tightness adjusting structure and the diaphragm structure, the diaphragm structure comprises a guide plate and a diaphragm, the diaphragm is clamped in the middle of the guide plate, a hollow cylinder is protruded and extended upward and downward in the middle of the guide plate, a thread is arranged outside the lower hollow cylinder.

[0009] Further, the hollow cylinder of the guide plate is sleeved with the diaphragm, a sealing gasket and a diaphragm locking gasket from top to bottom, the sealing gasket is semi-embedded in the diaphragm, and the upper surface of the diaphragm locking gasket is in contact with the lower surface of the sealing gasket.

[0010] A screw cap is screwed at the thread of the hollow cylinder of the guide plate, and a filter screen is arranged between the screw cap and the opening of the hollow cylinder.

[0011] Further, the water inlet is in contact with the lower end surface of the sealing gasket below the flow regulating component, the water inlet and the water outlet are at the same height, and a valve wall is arranged between the water inlet and the water outlet to separate them.

[0012] Further, the flow regulating component and the electromagnetic valve lower body are provided with an opening near the water outlet, and the opening is in communication with the water inlet.

[0013] The electromagnetic valve upper body and the electromagnetic valve lower body separate the opening and the water outlet.

[0014] Further, the flow regulating component comprises a knob, the knob is fixedly connected with a screw rod, and the screw rod is threadedly connected with a screw sleeve.

[0015] The screw sleeve is a hollow stepped cylinder, the upper cylinder has a small outer diameter and is internally threaded, the lower cylinder has a large outer diameter and has a large internal cavity, the upper cylinder extends downward into the cavity of the lower cylinder by a section, and an annular cavity is arranged between the extension section of the upper cylinder and the lower cylinder, and a spring is arranged in the annular cavity.

[0016] Further, the upper part of the screw rod is provided with a sandwich layer, a screw rod sealing ring is arranged in the sandwich layer, the screw rod and the screw sleeve are covered in a valve cover, and a movable allowance is arranged between the lower end surface of the knob and the valve cover.

[0017] Further, a fixing sleeve is arranged at the upper opening of the electromagnetic valve lower body near the water inlet, the fixing sleeve is a Y-shaped sleeve, and the upper surface of the fixing sleeve is in contact with the diaphragm in the flow regulating component.

[0018] Further, the end of the knob switch is provided with a top plate, one end of the top plate is located at the center of the knob switch, the other end of the top plate is located at the outer circle of the knob switch, and a limiting block is arranged at the other end of the knob switch.

[0019] The knob switch mounting hole is provided with an opening into which a locking piece is inserted.

[0020] The utility model has following gain effect:

[0021] The irrigation valve is provided with a flow adjusting component including a diaphragm structure above the water inlet, and a spring connection tightness adjusting structure above the diaphragm structure can adjust the tightness of the spring, so as to change the pressure required when the diaphragm structure is opened, and then realize flow control. A knob switch is arranged at the connecting position of the upper body and the lower body of the electromagnetic valve, and the knob switch can manually rotate to regularly fix the iron core when the electromagnetic iron cannot work to open the pilot hole, so as to open the pilot hole, open the irrigation valve, and has strong emergency capability, good reliability and convenient maintenance. In addition, a filter screen is arranged at the pilot hole position of the diaphragm structure to filter large impurities in water, so as to reduce the abrasion of important components in the irrigation valve, and the filter screen is convenient to disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is an assembly section view of the irrigation valve of the utility model.

[0023] Fig. 2 It is a water flow path schematic view when the irrigation valve of the utility model is opened.

[0024] Fig. 3 It is a knob switch schematic view of the utility model.

[0025] In the drawing, 1 is a knob, 2 is a screw rod, 3 is a screw rod sealing ring, 4 is a valve cover, 5 is a screw sleeve, 6 is a screw, 7 is a spring, 8 is a diaphragm, 9 is a fixed sleeve, 10 is a flow guide plate, 11 is a diaphragm, 12 is a sealing gasket, 13 is a diaphragm locking gasket, 14 is a nut cover, 15 is a filter screen, 16 is an electromagnetic head shell, 17 is an iron sheet, 18 is a coil skeleton, 19 is a power line, 20 is a static iron core, 21 is a static iron core sealing ring, 22 is an iron sleeve, 23 is a lacquered copper wire, 24 is an iron core spring, 25 is an iron gasket, 26 is a dynamic iron core, 27 is an electromagnetic head sealing ring, 28 is an iron core sealing ring, 29 is a switch sealing ring, 30 is a knob switch, 31 is a locking piece, 32 is a valve seat, 33 is a water inlet, 34 is a water outlet, 35 is a knob switch mounting hole, 36 is a top plate, and 37 is a limiting block. DETAILED DESCRIPTION

[0026] The utility model will be further described in combination with the drawings and specific embodiments, but the protection scope of the utility model is not limited thereto.

[0027] Embodiment one:

[0028] For example, Figs. 1-3As shown, the utility model relates to an irrigation valve, in the drawing, the irrigation valve includes solenoid valve upper body and solenenum valve lower body composition. Solenoid valve upper body and flow regulating component are located in the upper of solenenum valve lower body. The installation position of flow regulating component is close to the middle part of solenenum valve lower body, and the installation position of solenoid valve upper body is close to the side of water outlet 34. In the utility model, solenoid valve upper body includes electromagnet.

[0029] For the pilot solenoid valve, the diaphragm structure is connected with the electromagnet, so the electromagnet is located in the middle part of the solenoid valve. In the utility model, the diaphragm structure is connected with the flow regulating component, so the flow regulating component is located in the middle part of the solenoid valve, and the electromagnet is placed in the side end. Because the water flow needs to flow from the water inlet 33 to the water outlet 34 along the pilot hole, the installation position of the solenoid valve upper body is closer to the water outlet 34.

[0030] In the utility model, the flow regulating component can be divided into two parts, the upper part is the tightness adjusting structure, including knob 1, screw rod 2, screw rod sealing ring 3 and screw sleeve 5, the knob 1 is fixedly connected with the screw rod 2, when the knob 1 rotates, the screw rod 2 will rotate at the same angular velocity. The screw rod 2 is in cylindrical shape, the upper end of the screw rod 2 extends outwardly with two layers of disc-shaped structures with larger diameter, the screw rod sealing ring 3 is installed in the middle of the two layers of disc-shaped structures, a blind hole with larger depth is formed in the screw rod 2 extending from the lower part to the upper part.

[0031] The screw sleeve 5 is a hollow cylindrical sleeve, the screw sleeve 5 is a stepped column, the diameter of the upper column of the screw sleeve 5 is smaller, and the diameter of the lower column of the screw sleeve 5 is larger, the inner cavity is larger, the upper column of the screw sleeve 5 also extends downwardly for a section, because the outer diameter of the upper column is smaller than the inner diameter of the lower column of the screw sleeve 5, so there is a gap between the extension section of the upper column and the lower column in the lower column, and the size of the gap is larger, so that the spring 7 can be installed. The diameter of the disc-shaped structure of the screw rod 2 is similar to the diameter of the upper column of the screw sleeve 5. In the rotating process, the screw rod 2 remains relatively stationary, and the screw sleeve 5 slides up and down on the screw rod 2.

[0032] The tightness adjusting structure is covered in the inside of the valve cover 4 except the knob 1, the disc-shaped structure of the screw rod 2 can limit the tightness adjusting structure, so that the tightness adjusting structure can be kept in the valve cover 4, the part of the inside of the valve cover 4 matched with the tightness adjusting structure is provided with a corresponding stepped hole section, and the part of the inside of the valve cover 4 matched with the tightness adjusting structure has two steps, the upper step limits the movement of the disc-shaped structure, and the middle step limits the movement of the screw sleeve 5.

[0033] The lower part of the flow regulating component is a diaphragm structure, which comprises from top to bottom a flow guide plate 10 and a diaphragm 8 and a diaphragm 11 and a gasket 12 and a diaphragm locking washer 13 and a filter screen 15 and a screw cap 14. The diaphragm structure is formed by stacking the components. The uppermost layer is the flow guide plate 10, the middle part of which is a hollow cylinder, the inside is hollow, the upper part is large, the middle part is narrow, and the lower part is wide but the diameter is smaller than the upper part. The shape of the transition chamber between the upper large chamber and the middle small chamber is a stepped shape, and the shape of the transition chamber between the middle small chamber and the lower wide chamber is also a stepped shape.

[0034] At the end of the upper large chamber to the end of the middle small chamber, a circular disc structure is derived outwardly from the outer wall of the flow guide plate 10, which has a large area at the top and a small area at the bottom. The diaphragm 11 is a disc structure, which is sleeved on the hollow cylinder of the flow guide plate 10. The diaphragm 11 cooperates with the flow guide plate 10, and the circular disc surface of the flow guide plate 10 cooperates with the upper part of the diaphragm 11.

[0035] Therefore, the upper part of the diaphragm 11 is recessed inwardly by a portion, and the recessed portion is matched with the shape of the circular disc of the flow guide plate 10. Although the circular disc part of the flow guide plate 10 cooperates with the recessed part of the diaphragm 11, they do not directly contact each other. The diaphragm 8 is sleeved on the inner wall of the lowest point of the recessed position of the diaphragm 11, and the diaphragm 8 is clamped between the circular disc part of the flow guide plate 10 and the recessed part of the diaphragm 11.

[0036] The gasket 12 is sleeved on the hollow cylinder of the flow guide plate 10, the upper half of the gasket 12 is embedded in the inside of the lower half of the diaphragm 11, the diameter of the gasket 12 is larger than the diameter of the upward outlet of the water inlet 33, and the gasket 12 covers the pipeline opening at the outlet of the water inlet 33.

[0037] The upper surface of the diaphragm locking washer 13 is attached to the lower surface of the gasket 12, and the diaphragm locking washer 13 is also sleeved on the hollow cylinder of the flow guide plate 10. The outer wall of the hollow cylinder of the flow guide plate 10 below the lower end surface of the diaphragm locking washer 13 is provided with threads. The filter screen 15 is attached to the lower end surface of the hollow cylinder of the flow guide plate 10, the screw cap 14 is threadedly connected with the lower end hollow cylinder of the flow guide plate 10, and the screw cap 14 and the flow guide plate 10 clamp the filter screen 15 therebetween. Because the diaphragm structure is a combined structure, it is convenient to clean and replace one of the components, and it is simple to maintain and repair.

[0038] The installation of the diaphragm structure in the valve is that the outer edge of the diaphragm 8 is clamped by the valve cover 4 and the valve seat 32, and a fixing sleeve 9 is arranged inside the valve seat 32 and below the installation position of the diaphragm 8, and the fixing sleeve 9 is a Y-shaped sleeve. The upper part of the fixing sleeve 9 is clamped on the step of the inner wall of the valve seat 32, and the outer wall of the lower half part is attached to the inner wall of the valve seat 32. Because the diaphragm 8 is flexible and the shape can be changed, a part of the diaphragm 8 is attached to the upper surface of the fixing sleeve 9.

[0039] The diaphragm structure and the tightness adjusting structure are connected through the spring 7, one end of the spring 7 is sleeved in the gap between the extension section of the upper column and the lower column of the screw sleeve 5, because of the characteristics of the pilot valve, the diaphragm structure is lifted to make the water inlet 33 and the water outlet 34 communicate without relying on the pulling force of the spring 7, but the diaphragm structure closes the flow path between the water inlet 33 and the water outlet 34, on one hand, relying on the gravity of the diaphragm structure itself, and on the other hand, relying on the downward pressure of the spring additionally applied to the diaphragm structure.

[0040] Therefore, the lower end of the spring 7 is sleeved on the outer wall of the hollow cylinder of the upper part of the flow guide plate 10, and the upper end is clamped in the gap between the extension section of the upper column and the lower column of the screw sleeve 5, so that the spring 7 is clamped between the tightness adjusting structure and the diaphragm structure and cannot fall out. By rotating the knob 1 to make the screw rod 2 rotate, the screw sleeve 5 can be moved downward, so that the spring 7 is compressed, the downward pressure of the spring 7 applied to the diaphragm structure is increased, and the force of water overcoming the gravity of the diaphragm structure and the pressure of the spring to lift the diaphragm structure is increased. Therefore, the flow from the water inlet 33 to the water outlet 34 is reduced.

[0041] The electromagnetic assembly is located beside the tightness adjusting structure and is fixed on the valve cover 4 through screw rotation, and the iron core sealing ring 28 of the electromagnet covers the pilot hole of the valve seat 32 leading to the water outlet 34. Only when the electromagnet is powered on and the moving iron core 26 moves upward, the pilot hole covered by the iron core sealing ring 28 is opened, so that the water flow can flow along the pilot hole to generate a pressure difference. Further, the diaphragm structure is lifted to make the water flow directly from the water inlet 33 to the water outlet 34.

[0042] Embodiment two:

[0043] As Figs. 1-3 shown, the utility model relates to an irrigation valve, in the drawing, the irrigation valve includes solenoid valve upper body and solenoid valve lower body composition. Solenoid valve upper body and flow regulating component are located above solenoid valve lower body. The installation position of flow regulating component is close to the middle part of solenoid valve lower body, and the installation position of solenoid valve upper body is close to the side of water outlet 34. In the utility model, solenoid valve upper body includes electromagnet.

[0044] For the pilot solenoid valve, the membrane structure is connected with the solenoid, so the solenoid is located in the middle of the solenoid valve. In the utility model, the membrane structure is connected with the flow regulating component, so the flow regulating component is located in the middle of the solenoid valve, and the solenoid is arranged at the side end. Because water flow needs to flow from the water inlet 33 to the water outlet 34 along the pilot hole, the mounting position of the upper body of the solenoid valve is closer to the water outlet 34.

[0045] In the utility model, the flow regulating component can be divided into two parts, the upper part is the tightness adjusting structure, including knob 1, screw rod 2, screw rod sealing ring 3, screw sleeve 5, the knob 1 is fixedly connected with the screw rod 2, when the knob 1 rotates, the screw rod 2 can rotate at the same angular velocity. The screw rod 2 is in the shape of a cylinder, the upper end of the screw rod 2 extends outwardly and has two layers of disc-shaped structures with a larger diameter, a screw rod sealing ring 3 is arranged in the middle of the two layers of disc-shaped structures, a thread is arranged along the outer wall of the screw rod 2, and a blind hole with a large depth is arranged on the screw rod 2 and extends upwardly from the lower part.

[0046] The screw sleeve 5 is a hollow cylindrical sleeve, the screw sleeve 5 is in the shape of a stepped column, the upper column of the screw sleeve 5 has a smaller diameter, the lower column of the screw sleeve 5 has a larger diameter, the inner cavity is relatively large, and the upper column of the screw sleeve 5 also extends downwardly by a section, because the outer diameter of the upper column is smaller than the inner diameter of the lower column of the screw sleeve 5, so there is a gap between the extension section of the upper column and the lower column in the lower column, and the gap is relatively large and can be used for installing a spring 7. The diameter of the disc-shaped structure of the screw rod 2 is similar to the diameter of the upper column of the screw sleeve 5. In the rotating process, the screw rod 2 remains relatively stationary, and the screw sleeve 5 slides upwardly and downwardly on the screw rod 2.

[0047] The tightness adjusting structure is entirely covered in the inside of the valve cover 4 except the knob 1, the disc-shaped structure of the screw rod 2 can limit the tightness adjusting structure, so that the tightness adjusting structure can be kept in the valve cover 4, the part of the inside of the valve cover 4 matched with the tightness adjusting structure is provided with a corresponding stepped hole section, and the part of the inside of the valve cover 4 matched with the tightness adjusting structure has two steps, the upper step limits the movement of the disc-shaped structure, and the middle step limits the movement of the screw sleeve 5.

[0048] The lower part of the flow regulating component is the membrane structure, the membrane structure comprises, from top to bottom, a flow guide plate 10, a diaphragm 8, a partition diaphragm 11, a sealing gasket 12, a diaphragm locking gasket 13, a filter screen 15 and a nut cover 14. The membrane structure is formed by stacking the components. The flow guide plate 10 is located at the uppermost layer, the middle part of the flow guide plate 10 is a hollow cylinder, the inside is hollow and has the structure that the upper part is large, the middle part is narrow, and the lower part is wide but has a smaller diameter than the upper part. The shape of the transition chamber between the upper large chamber and the middle small chamber is in the shape of a ladder, and the shape of the transition chamber between the middle small chamber and the lower wide chamber is also in the shape of a ladder.

[0049] At the end of the upper large chamber to the end of the middle small chamber, the outer wall of the flow guide plate 10 diverges outwardly a circular disc structure in the shape of a circular truncated cone, the upper part of which is large in area and the lower part is small in area. The diaphragm 11 is in the shape of a disc and is sleeved on the hollow cylindrical part of the flow guide plate 10. The diaphragm 11 cooperates with the flow guide plate 10, and the circular truncated cone surface of the flow guide plate 10 cooperates with the upper part of the diaphragm 11.

[0050] Therefore, the upper part of the diaphragm 11 is recessed inwardly by a portion, the recessed portion being in a shape cooperating with the shape of the circular truncated cone of the flow guide plate 10. Although the circular truncated cone part of the flow guide plate 10 cooperates with the recessed portion of the diaphragm 11, the two do not directly contact each other. The diaphragm 8 is sleeved on the inner wall at the lowest point of the recessed position of the diaphragm 11, and the diaphragm 8 is clamped between the circular truncated cone part of the flow guide plate 10 and the recessed portion of the diaphragm 11.

[0051] The sealing gasket 12 is sleeved on the hollow cylindrical part of the flow guide plate 10, the upper half of the sealing gasket 12 is embedded in the inside of the lower half of the diaphragm 11, the diameter of the sealing gasket 12 is larger than the diameter of the upward outlet of the water inlet 33, and the sealing gasket 12 covers the pipeline opening at the outlet of the water inlet 33.

[0052] The upper surface of the diaphragm locking gasket 13 is attached to the lower surface of the sealing gasket 12, and the diaphragm locking gasket 13 is also sleeved on the hollow cylindrical part of the flow guide plate 10. The outer wall of the hollow cylindrical part of the flow guide plate 10 below the lower end surface of the diaphragm locking gasket 13 is provided with a thread. The filter screen 15 is attached to the lower end surface of the hollow cylindrical part of the flow guide plate 10, the screw cap 14 is threadedly connected with the lower end hollow cylindrical part of the flow guide plate 10, and the flow guide plate 10 clamps the filter screen 15 in the middle. Because the diaphragm structure is a combined structure, it is convenient to clean and replace one of the components, and maintenance is simple.

[0053] The installation of the diaphragm structure in the valve is achieved by clamping the outer edge of the diaphragm 8 by the valve cover 4 and the valve seat 32. A fixing sleeve 9 in the shape of a Y is arranged inside the valve seat 32 below the installation position of the diaphragm 8. The upper part of the fixing sleeve 9 is clamped on the step of the inner wall of the valve seat 32, and the outer wall of the lower half part is attached to the inner wall of the valve seat 32. Because the diaphragm 8 is flexible and its shape can be changed, a part of the diaphragm 8 is attached to the upper surface of the fixing sleeve 9.

[0054] The electromagnetic valve upper body structure is provided near the tightness adjusting structure, and includes an electromagnetic iron assembly. The electromagnetic iron is surrounded by an electromagnetic head shell 16, and a cavity is provided inside the electromagnetic head shell. Two sides of the cavity are provided with enameled copper wires 23. A coil former 18 is further provided outside the enameled copper wires. An iron sheet 17 is further provided above the coil former 18, and the iron sheet 17 is clamped between the coil former 18 and the electromagnetic head shell 16. An iron sleeve 22 is further provided outside the coil former 18 and clamped between the coil former 18 and the electromagnetic head shell 16. An iron washer 25 is provided inside and below the coil former 18 and between the coil former 18 and the electromagnetic head shell 16.

[0055] A cavity is provided in the coil former 18, and an iron core assembly is placed in the cavity. The uppermost end is a static iron core 20, which is fixed in the electromagnetic head shell 16. A static iron core sealing ring 21 is provided between the static iron core 20 and the coil former 18. A dynamic iron core 26 is provided below the static iron core 21, and the static iron core 21 and the dynamic iron core 26 are connected by an iron core spring 24. The bottom of the dynamic iron core 26 is wrapped with an iron core sealing ring 28, and the iron core sealing ring 28 is exposed outside the opening of the electromagnetic head shell 16 and blocks the pilot hole above the valve seat 32.

[0056] The lower end of the electromagnetic head shell 16 is installed by screwing and cooperating with the valve cover 4, and an electromagnetic head sealing ring 27 is embedded in the bottom end face of the electromagnetic head shell 16. The top of the electromagnetic head shell 16 is connected with a power line 19.

[0057] The difference between the present embodiment and the first embodiment is that a knob switch mounting hole 35 is provided between the valve cover 4 and the valve seat 32 on the side where the electromagnetic iron is installed, and the knob switch 30 is installed in the knob switch mounting hole 35. The knob switch 30 is provided with a switch sealing ring 29 at the position where the knob switch 30 contacts the inner wall of the valve cover 4 and the valve seat 32. The knob switch 30 is provided with a top plate 36 at the end thereof, one end of the top plate 36 is located at the center of the knob switch 30, and the other end of the top plate 36 is located at the outer circle of the knob switch 30. The other end of the knob switch 30 is provided with a limiting block 37. The knob switch mounting hole 35 is provided with an opening into which a locking piece 31 is inserted. The opening is provided at the position of the valve seat 32. The limiting block 37 can limit the angle of rotation of the knob switch 30 in the knob switch mounting hole 35.

[0058] Generally, the top plate 36 of the knob switch 30 does not contact the bottom of the iron core sealing ring 28, and does not affect the normal operation of the electromagnetic iron. However, when power failure occurs or the electromagnetic iron fails to normally open the pilot hole to open the irrigation valve, the dynamic iron core 26 can be lifted by rotating the knob switch 30 to open the pilot hole and thus open the irrigation valve. When closing, the knob switch 30 only needs to be rotated to separate the top plate 36 from the iron core sealing ring 28 of the dynamic iron core 26, and the dynamic iron core will also block the pilot hole under the action of gravity, thereby closing the irrigation valve. The valve cover 4 and the valve seat 32 are fixedly connected by a screw 6.

[0059] Embodiment Three:

[0060] This embodiment introduces how the irrigation valve opens and closes and how the water flows between the pilot holes.

[0061] As Fig. 2 mentioned, before the electromagnet opens, because the diaphragm structure and the tightness adjustment structure are in a closed structure, water cannot flow in. After the electromagnet opens, water flows from the water inlet 33, at which time because the diaphragm structure blocks the water outlet, water flow can only flow from the middle hole of the guide plate 10 into the space between the diaphragm structure and the tightness adjustment structure. The valve cover 4 and the valve seat 32 have a flow channel between the tightness adjustment structure and the electromagnet structure, and water can flow into this place, while the pilot hole at the electromagnet position is opened because the moving iron core 26 is attracted, and water flow flows from the pilot hole to the water outlet 34. A flow path is formed in which water flows from the water inlet 33 to the water outlet 34.

[0062] Because the water between the diaphragm structure and the tightness adjustment structure is flowing, the pressure decreases, the diaphragm structure is lifted, and water flow directly flows from the water inlet 33 to the water outlet 34 to complete the opening of the irrigation valve.

[0063] The closing of the irrigation valve only needs to de-energize the electromagnet, at which time the moving iron core 26 falls under the action of gravity and re-blocks the pilot hole, at which time the upper flow path is blocked, but the lower water is still flowing, the upper pressure is greater than the lower pressure, the diaphragm structure is pressed downward to block the upper opening of the water inlet 33, thereby closing the irrigation valve.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An irrigation valve, comprising an upper solenoid valve body and a lower solenoid valve body, characterized in that: A flow regulating component is provided above the water inlet (33) of the irrigation valve, and an upper body of the electromagnetic valve is provided above the water outlet (34) of the irrigation valve; A knob switch mounting hole (35) is provided at the connection position between the solenoid valve upper body and the solenoid valve lower body, and a knob switch (30) is mounted in the knob switch mounting hole (35).

2. The irrigation valve according to claim 1, wherein: The flow regulating component comprises a tension regulating structure and a diaphragm structure, wherein a spring (7) is connected between the tension regulating structure and the diaphragm structure, and the diaphragm structure comprises a guide plate (10) and a diaphragm (11) sandwiching the diaphragm (8) in the middle, and a hollow column protruding upward and downward is provided in the middle of the guide plate (10), and a thread is provided on the outer side of the lower hollow column.

3. The irrigation valve according to claim 2, wherein: The hollow cylinder of the guide plate (10) is covered with a diaphragm (11), a sealing gasket (12) and a diaphragm locking gasket (13) from top to bottom, the sealing gasket (12) is half-embedded in the diaphragm (11), and the upper surface of the diaphragm locking gasket (13) is in contact with the lower surface of the sealing gasket (12); A nut cover (14) is screwed onto the thread of the hollow cylinder of the guide plate (10), and a filter mesh (15) is provided between the nut cover (14) and the opening of the hollow cylinder.

4. The irrigation valve according to claim 1, wherein: The water inlet (33) is opened upward at the lower body of the solenoid valve and contacts the lower end surface of the sealing gasket (12) below the flow regulating component. The axes of the water inlet (33) and the water outlet (34) are at the same height. A valve wall is provided between the water inlet (33) and the water outlet (34) near the water outlet (34) to separate the two.

5. The irrigation valve according to claim 1, 2, 3 or 4, characterized in that: The flow regulating component and the lower body of the solenoid valve are provided with an opening at a position close to the water outlet (34), and the opening is communicated with the water inlet (33); The electromagnetic valve upper body and the electromagnetic valve lower body separate the opening and the water outlet (34).

6. The irrigation valve according to claim 1, 2, 3 or 4, characterized in that: The flow regulating component comprises a knob (1), the knob (1) is fixedly connected to a screw rod (2), and the screw rod (2) is threadedly engaged with a screw sleeve (5); The screw sleeve (5) is a hollow stepped cylinder, the outer diameter of the upper cylinder is smaller and provided with an internal thread, the outer diameter of the lower cylinder is larger and there is a larger empty chamber inside, the upper cylinder extends downward for a section to the empty chamber of the lower cylinder, and there is an annular cavity between the extended section of the upper cylinder and the lower cylinder, and a spring (7) is provided in the annular cavity.

7. The irrigation valve according to claim 6, wherein: The upper portion of the screw (2) is provided with an interlayer, in which a screw sealing ring (3) is provided. The screw (2) and the screw sleeve (5) are enclosed in a valve cover (4), and a movable margin is provided between the lower end surface of the knob (1) and the valve cover.

8. The irrigation valve according to claim 1 or 2 or 3 or 4 or 7, characterized in that: A fixing sleeve (9) is provided at the upper opening of the lower body of the solenoid valve near the water inlet (33). The fixing sleeve (9) is a Y-shaped sleeve, and the upper surface of the fixing sleeve (9) contacts the diaphragm (8) in the flow regulating component.

9. The irrigation valve according to claim 1 or 2 or 3 or 4 or 7, characterized in that: A top plate (36) is provided at the end of the knob switch (30), one end of the top plate (36) is located at the center of the knob switch (30), and the other end is located at the outer circle of the knob switch (30), and a limit block (37) is provided at the other end of the knob switch; The knob switch mounting hole (35) is provided with an opening into which a locking piece (31) is inserted.

Images